Board Certified Ophthalmologist Exam — Questions and Answers

Question 1: A 55-year-old hyperopic female presents to the emergency department with severe right eye pain, headache, nausea, and blurred vision with halos around lights. On examination, her IOP is 52 mmHg, the cornea is hazy, the pupil is mid-dilated and nonreactive, and the anterior chamber is shallow. Gonioscopy of the fellow eye reveals a narrow, occludable angle. What is the definitive treatment for this condition?

Selective laser trabeculoplasty (SLT)
Intravenous acetazolamide followed by oral therapy
Laser peripheral iridotomy (Correct answer)
Topical prostaglandin analog therapy

Correct answer: Laser peripheral iridotomy

This patient presents with classic signs and symptoms of acute angle-closure glaucoma, which is an ophthalmic emergency. While initial management involves medically lowering the IOP with agents like topical beta-blockers, alpha-agonists, and systemic carbonic anhydrase inhibitors (acetazolamide), the definitive treatment to prevent recurrence and treat the underlying mechanism of pupillary block is a laser peripheral iridotomy (LPI). LPI creates an alternative pathway for aqueous humor to flow from the posterior to the anterior chamber, relieving the pressure gradient and allowing the peripheral iris to move away from the trabecular meshwork. SLT is used for open-angle glaucoma.

Question 2: A 60-year-old woman with Fuchs endothelial corneal dystrophy reports that her vision is worst upon waking and gradually improves throughout the day. What is the pathophysiologic explanation for this pattern?

Endothelial pump function is inhibited by melatonin
Intraocular pressure spikes during sleep cause corneal decompensation
Descemet membrane detachment occurs during sleep
Overnight lid closure reduces tear evaporation, increasing corneal edema (Correct answer)

Correct answer: Overnight lid closure reduces tear evaporation, increasing corneal edema

During sleep, closed lids prevent tear film evaporation, causing relative corneal hydration that worsens edema in a cornea with compromised endothelial pump function.

Question 3: A 28-year-old woman with known myasthenia gravis presents with fluctuating ptosis and diplopia that worsens throughout the day. Ice pack test improves the ptosis. What percentage of ocular myasthenia patients will develop generalized disease within two years?

10-15%
50-60% (Correct answer)
25-30%
80-90%

Correct answer: 50-60%

Approximately 50-60% of patients presenting with ocular myasthenia gravis will progress to generalized myasthenia within two years of symptom onset.

Question 4: In a patient with Mooren ulcer, what is the characteristic pattern of corneal involvement?

Peripheral ulcerative keratitis with undermined leading edge progressing centrally (Correct answer)
Bilateral band-shaped opacity at the interpalpebral zone
Superior pannus with Herbert pits
Central stromal abscess with hypopyon

Correct answer: Peripheral ulcerative keratitis with undermined leading edge progressing centrally

Mooren ulcer is an autoimmune peripheral ulcerative keratitis with a characteristic undermined, overhanging central edge that progresses circumferentially and centrally.

Question 5: What is the most significant risk factor for the development of normal-tension glaucoma?

High myopia
Disc hemorrhage and thin central corneal thickness (Correct answer)
Elevated serum cholesterol
Family history of glaucoma

Correct answer: Disc hemorrhage and thin central corneal thickness

Disc hemorrhages and thin central corneal thickness are strongly associated with normal-tension glaucoma and predict progression.

Question 6: Which symptom is most commonly associated with acute angle-closure glaucoma?

Slow peripheral vision loss
Dryness and grittiness
Itchy eyes
Sudden severe eye pain (Correct answer)

Correct answer: Sudden severe eye pain

Retinal detachment occurs when the retina separates from its underlying supportive tissue, leading to potential vision loss. Common initial symptoms include a sudden onset of flashes of light (photopsia) and new, numerous floaters, which may appear as specks or cobwebs in the visual field. These symptoms warrant immediate ophthalmological evaluation.

Question 7: A patient with sickle cell disease develops proliferative retinopathy. In which retinal location do sea-fan neovascular lesions most commonly arise?

Peripheral retina at the border of perfused and non-perfused zones (Correct answer)
Along the major vascular arcades
Posterior pole near the macula
Peripapillary region

Correct answer: Peripheral retina at the border of perfused and non-perfused zones

Sea-fan neovascularization in sickle cell retinopathy characteristically develops at the junction between perfused and non-perfused peripheral retina.

Question 8: A patient has a spectacle prescription of -10.00 D sphere. The measurement from the posterior surface of the spectacle lens to the corneal apex (vertex distance) is 12 mm. To achieve the same effective optical correction with a contact lens, what power should be prescribed?

-11.36 D
-9.00 D
-8.93 D (Correct answer)
-10.00 D

Correct answer: -8.93 D

For spectacle powers greater than +/- 4.00 D, the vertex distance becomes clinically significant when converting to a contact lens prescription. The formula for the effective power at the cornea (Fc) is Fc = Fs / (1 - d * Fs), where Fs is the spectacle power and d is the vertex distance in meters. In this case, Fs = -10.00 D and d = 0.012 m. Fc = -10.00 / (1 - (0.012 * -10.00)) = -10.00 / (1 + 0.12) = -10.00 / 1.12 ≈ -8.93 D. Moving a high minus lens closer to the eye reduces its effective power, so a weaker minus contact lens is required. [4, 9, 16]

Question 9: Which laboratory test is most useful in the initial workup of a patient with suspected sarcoid uveitis?

Antinuclear antibody (ANA)
HLA-B27 typing
Antineutrophil cytoplasmic antibody (ANCA)
Serum angiotensin-converting enzyme (ACE) (Correct answer)

Correct answer: Serum angiotensin-converting enzyme (ACE)

Serum ACE is elevated in approximately 60–75% of patients with active sarcoidosis and is a useful screening test for sarcoid uveitis, though it lacks specificity.

Question 10: A biconvex lens made of crown glass (n=1.52) has a power of +5.00 D in air (n=1.00). If this same lens is fully submerged in water (n=1.33), what is its new approximate power?

It becomes a minus-powered lens.
+1.83 D (Correct answer)
+5.00 D
+7.80 D

Correct answer: +1.83 D

The power of a lens depends on the difference between the refractive index of the lens material and the surrounding medium. The simplified Lensmaker's equation is Power ∝ (n_lens - n_medium). In air, the power is proportional to (1.52 - 1.00) = 0.52. In water, the power is proportional to (1.52 - 1.33) = 0.19. The new power can be found by the ratio: P_water / P_air = (0.19 / 0.52). So, P_water = +5.00 D * (0.19 / 0.52) ≈ +1.83 D. Submerging the lens in a medium with a higher refractive index reduces the refractive power of the lens. [2, 17, 25]

Question 11: Which corneal dystrophy is characterized by recurrent erosions beginning in the first decade of life and demonstrates map-dot-fingerprint patterns on slit lamp examination?

Lattice dystrophy type I
Epithelial basement membrane dystrophy (Correct answer)
Meesmann dystrophy
Reis-Bücklers dystrophy

Correct answer: Epithelial basement membrane dystrophy

Epithelial basement membrane dystrophy (EBMD/Cogan's) is the most common anterior corneal dystrophy, characterized by map-like gray patches, microcysts (dots), and fingerprint lines.

Question 12: Which class of medication is the first-line treatment for non-infectious uveitis?

Calcineurin inhibitors (cyclosporine)
Antimetabolites (methotrexate)
Anti-TNF biologics (adalimumab)
Corticosteroids (Correct answer)

Correct answer: Corticosteroids

Corticosteroids—topical, periocular, or systemic—are the first-line agents for non-infectious uveitis due to their potent and rapid anti-inflammatory effect.

Question 13: Which aberration causes a point source of light to appear as a comet-shaped blur when imaged through a spherical lens peripherally?

Distortion
Coma (Correct answer)
Chromatic aberration
Spherical aberration

Correct answer: Coma

Coma produces an asymmetric, comet-shaped image of off-axis point sources due to varying magnification across the lens aperture.

Question 14: What is the most common benign eyelid lesion in adults?

Chalazion (Correct answer)
Hordeolum (stye)
Papilloma
Sebaceous cyst

Correct answer: Chalazion

A chalazion, caused by obstruction of a meibomian gland leading to a sterile lipogranulomatous reaction, is the most common benign eyelid lesion in adults.

Question 15: Which class of glaucoma medications works by decreasing aqueous humor production through inhibition of carbonic anhydrase?

Dorzolamide (Correct answer)
Brimonidine
Latanoprost
Pilocarpine

Correct answer: Dorzolamide

Dorzolamide is a topical carbonic anhydrase inhibitor that reduces aqueous humor production.

Question 16: A premature infant born at 26 weeks gestational age undergoes retinopathy of prematurity screening. Zone I, stage 3 disease with plus disease is identified. What is the appropriate management?

Observation with follow-up in one week
Treatment within 72 hours with laser photocoagulation or intravitreal anti-VEGF (Correct answer)
Vitrectomy with scleral buckle
Cryotherapy to the avascular retina

Correct answer: Treatment within 72 hours with laser photocoagulation or intravitreal anti-VEGF

Zone I ROP with plus disease meets criteria for type 1 ROP per the ETROP study, requiring treatment within 72 hours with laser photocoagulation or intravitreal anti-VEGF.

Question 17: A patient presents with a painless, slowly progressive unilateral proptosis. MRI shows a well-circumscribed intraconal mass with homogeneous enhancement. What is the most likely diagnosis?

Orbital varix
Cavernous hemangioma (cavernous venous malformation) (Correct answer)
Metastatic lesion
Optic nerve sheath meningioma

Correct answer: Cavernous hemangioma (cavernous venous malformation)

Cavernous hemangioma (cavernous venous malformation) is the most common benign orbital tumor in adults and presents as a well-circumscribed intraconal mass with homogeneous enhancement.

Question 18: What is the target IOP reduction generally recommended for a patient newly diagnosed with normal-tension glaucoma showing progressive field loss?

50% reduction from baseline
30% reduction from baseline (Correct answer)
Achieve IOP below 21 mmHg
10% reduction from baseline

Correct answer: 30% reduction from baseline

The Collaborative Normal-Tension Glaucoma Study demonstrated that a 30% reduction from baseline IOP slows progression.

Question 19: A 45-year-old contact lens wearer presents with a rapidly progressive corneal ulcer and satellite lesions. Culture on Sabouraud agar grows filamentous organisms. Which antifungal agent is the most appropriate first-line treatment?

Fluconazole 0.2% ophthalmic drops
Amphotericin B 0.15% ophthalmic drops
Oral itraconazole
Natamycin 5% ophthalmic suspension (Correct answer)

Correct answer: Natamycin 5% ophthalmic suspension

Natamycin 5% is the preferred first-line topical antifungal for filamentous fungal keratitis such as Fusarium and Aspergillus species.

Question 20: A 55-year-old male presents with a one-week history of painless, progressive central vision loss in his right eye. Fundus examination reveals a localized serous detachment of the neurosensory retina in the macula. Optical coherence tomography (OCT) confirms subretinal fluid. Fluorescein angiography shows a focal point of leakage. What is the most appropriate initial management for this patient with acute central serous chorioretinopathy (CSC)?

Focal laser photocoagulation to the leakage point.
Observation for 3-4 months with lifestyle modification advice. (Correct answer)
Half-dose photodynamic therapy (PDT).
Immediate intravitreal anti-VEGF injection.

Correct answer: Observation for 3-4 months with lifestyle modification advice.

For most cases of acute central serous chorioretinopathy, the standard initial management is observation, as many cases resolve spontaneously within 3 to 4 months. Patients are often counseled on modifying risk factors such as stress. Active interventions like laser photocoagulation or PDT are typically reserved for chronic or persistent cases, or in specific situations where a patient has occupational needs for rapid vision recovery.

Question 21: What is the most common cause of vitreous hemorrhage in adults in the United States?

Trauma
Retinal tear
Proliferative diabetic retinopathy (Correct answer)
Posterior vitreous detachment

Correct answer: Proliferative diabetic retinopathy

Proliferative diabetic retinopathy is the leading cause of vitreous hemorrhage in US adults due to bleeding from fragile neovascular vessels.

Question 22: A 28-year-old woman presents with a three-day history of painful, progressively worsening vision in her left eye. On examination, her visual acuity is 20/200 in the affected eye, and a prominent relative afferent pupillary defect is present. Which of the following clinical features is most characteristic of typical optic neuritis associated with multiple sclerosis?

Severe optic disc edema (papilledema)
No improvement in vision after several weeks
Pain that is exacerbated by eye movement (Correct answer)
Absence of pain with eye movements

Correct answer: Pain that is exacerbated by eye movement

Pain with eye movement is a hallmark symptom of typical optic neuritis, reported in over 90% of cases. This pain occurs because the inflamed optic nerve sheath is tethered to the extraocular muscles. While the optic disc may be swollen, severe papilledema is atypical. An RAPD is expected, and vision typically begins to recover within a few weeks.

Question 23: What is the dioptric power of a thin lens with a focal length of 25 cm?

+4.00 D (Correct answer)
+0.25 D
+2.50 D
+40.00 D

Correct answer: +4.00 D

Power in diopters equals the reciprocal of the focal length in meters: 1/0.25 = 4.00 D.

Question 24: An AIDS patient develops painless progressive vision loss with a 'pizza pie' fundus appearance showing retinal whitening and hemorrhage. What is the most likely diagnosis?

Toxoplasmic retinitis
CMV retinitis (Correct answer)
Acute retinal necrosis (ARN)
Progressive outer retinal necrosis (PORN)

Correct answer: CMV retinitis

CMV retinitis in immunocompromised patients classically presents with a 'pizza pie' or 'scrambled eggs and ketchup' appearance of retinal whitening (necrosis) with hemorrhage along vascular arcades.

Question 25: Which optic nerve head finding on OCT is most useful for detecting early structural glaucomatous damage before visual field changes appear?

Retinal nerve fiber layer thinning (Correct answer)
Peripapillary atrophy
Increased cup-to-disc ratio
Disc hemorrhage

Correct answer: Retinal nerve fiber layer thinning

RNFL thinning on OCT can detect structural glaucomatous damage before functional visual field loss becomes measurable.

Question 26: A 72-year-old patient with a mature white cataract undergoes phacoemulsification. During surgery, the capsular bag is noted to have significant zonular weakness. Which device is most appropriate to stabilize the capsular bag?

Ahmed glaucoma valve
Iris retractor hooks
Anterior vitrectomy cutter
Capsular tension ring (Correct answer)

Correct answer: Capsular tension ring

A capsular tension ring redistributes zonular stress and stabilizes the capsular bag during phacoemulsification in eyes with zonular weakness.

Question 27: A patient with recurrent corneal erosion syndrome has failed conservative management with lubricants and bandage contact lenses. What is the next appropriate intervention?

Penetrating keratoplasty
Anterior stromal micropuncture or epithelial debridement with diamond burr polishing (Correct answer)
Amniotic membrane transplantation
Topical cyclosporine alone

Correct answer: Anterior stromal micropuncture or epithelial debridement with diamond burr polishing

Anterior stromal micropuncture or diamond burr polishing promotes stronger epithelial adhesion by disrupting the abnormal basement membrane.

Question 28: A patient presents with a small, round, white opacity on the anterior lens capsule following a resolved episode of acute angle-closure glaucoma. What is this finding called?

Vossius ring
Mittendorf dot
Glaukomflecken (Correct answer)
Elschnig pearls

Correct answer: Glaukomflecken

Glaukomflecken are small anterior subcapsular lens opacities caused by focal ischemic necrosis of the lens epithelium during an acute angle-closure attack.

Question 29: Which finding on a dilated fundus examination best differentiates glaucomatous optic neuropathy from physiologic cupping?

Symmetric cup-to-disc ratio of 0.3 bilaterally
Pink and healthy neuroretinal rim in all quadrants
Asymmetric cup-to-disc ratio with focal notching of the neuroretinal rim (Correct answer)
Round, central cup with preserved rim tissue

Correct answer: Asymmetric cup-to-disc ratio with focal notching of the neuroretinal rim

Focal notching of the neuroretinal rim, especially inferiorly or superiorly, with asymmetric cupping between eyes is pathognomonic for glaucomatous damage rather than physiologic cupping.

Question 30: A corneal transplant patient develops a Khodadoust line 14 months postoperatively. What does this finding indicate?

Endothelial rejection (Correct answer)
Subepithelial rejection
Epithelial rejection
Stromal rejection

Correct answer: Endothelial rejection

A Khodadoust line is a linear endothelial precipitate that represents endothelial graft rejection, the most sight-threatening form of corneal transplant rejection.

Question 31: During static retinoscopy from a working distance of 67 cm, the examiner sweeps the light streak horizontally across the patient's pupil and observes a red reflex that moves in the same direction as the streak ('with' motion). Which of the following does this finding indicate?

The patient's far point is located at the examiner's pupil.
The patient's far point is located between the examiner and the patient.
The patient is myopic by more than -1.50 D.
The patient's far point is located behind the examiner's pupil. (Correct answer)

Correct answer: The patient's far point is located behind the examiner's pupil.

'With' motion during retinoscopy signifies that the patient's far point is located behind the examiner's pupil (the peephole of the retinoscope). [5, 20, 28] This occurs in hyperopia, emmetropia, or myopia of less power than the dioptric equivalent of the working distance. In this case, the working distance is 67 cm, which corresponds to 1/0.67m ≈ +1.50 D. 'With' motion means the eye is relatively hyperopic to this +1.50 D working distance lens, requiring the addition of plus-powered lenses to achieve neutrality. An 'against' motion would indicate the far point is between the examiner and the patient. [5, 20, 28]

Question 32: A 10-month-old infant presents with persistent tearing and mattering of the right eye since birth, consistent with congenital nasolacrimal duct obstruction (CNLDO). Conservative management with massage and topical antibiotics has failed to resolve the symptoms. According to current evidence, what is the most appropriate next step in management?

Perform nasolacrimal duct probing under general anesthesia. (Correct answer)
Place a Crawford tube without initial probing.
Perform a dacryocystorhinostomy (DCR).
Continue conservative management and re-evaluate at 18 months.

Correct answer: Perform nasolacrimal duct probing under general anesthesia.

Spontaneous resolution of CNLDO is high in the first year of life, but the rate plateaus after 9-10 months. Probing is a highly successful first-line surgical intervention, with success rates declining after 12-15 months. Therefore, for a 10-month-old who has failed conservative therapy, probing is the most appropriate next step. DCR is reserved for failed probings or complex cases, and placing a tube without probing is not the standard initial procedure.

Question 33: Which of the following findings is part of the classic triad for Horner's syndrome?

Mydriasis
Lagophthalmos
Exophthalmos
Ptosis (Correct answer)

Correct answer: Ptosis

Horner's syndrome results from a disruption of the oculosympathetic pathway. The classic triad of signs consists of ipsilateral ptosis (mild drooping of the upper eyelid), miosis (a constricted pupil), and facial anhidrosis (decreased sweating). Mydriasis (pupil dilation) is the opposite of what is seen. Exophthalmos and lagophthalmos are not features of Horner's syndrome.

Question 34: Which class of glaucoma medication is contraindicated in patients with a history of cystoid macular edema following cataract surgery?

Alpha-2 agonists
Carbonic anhydrase inhibitors
Prostaglandin analogs (Correct answer)
Beta-blockers

Correct answer: Prostaglandin analogs

Prostaglandin analogs can exacerbate or trigger cystoid macular edema, particularly in pseudophakic eyes with disrupted posterior capsule.

Question 35: Which of the following findings is a core component of the classic triad for Horner's syndrome?

Mydriasis
Exophthalmos
Miosis (Correct answer)
Lid retraction

Correct answer: Miosis

Horner's syndrome results from an interruption of the oculosympathetic pathway. The classic triad of signs consists of miosis (a constricted pupil), ptosis (a droopy eyelid), and anhidrosis (decreased sweating) on the affected side of the face. Mydriasis (pupil dilation), lid retraction, and exophthalmos are signs of sympathetic over-action, not paresis.

Question 36: Which IOL material has the lowest rate of posterior capsule opacification (PCO)?

Hydrophilic acrylic
Hydrophobic acrylic (Correct answer)
Silicone
PMMA

Correct answer: Hydrophobic acrylic

Hydrophobic acrylic IOLs have a sharp square edge design and material properties that create a strong barrier effect against lens epithelial cell migration, resulting in the lowest PCO rates.

Question 37: Which test is commonly used to evaluate tear production?

Tonometry
Fluorescein angiography
Schirmer test (Correct answer)
Amsler grid test

Correct answer: Schirmer test

Glaucoma is a group of eye conditions that damage the optic nerve, often linked to elevated intraocular pressure (IOP). The primary objective of glaucoma treatment is to lower and maintain a healthy IOP. This crucial step helps to prevent further damage to the optic nerve and preserve the patient's remaining vision.

Question 38: During pterygium surgery, which antimetabolite is most commonly used as an adjunct to reduce recurrence?

Mitomycin C (Correct answer)
Bevacizumab
5-Fluorouracil
Cyclosporine

Correct answer: Mitomycin C

Mitomycin C is the most widely used adjunctive antimetabolite in pterygium surgery, applied intraoperatively to inhibit fibroblast proliferation and reduce recurrence.

Question 39: What is the mechanism of action of cyclosporine when used as a steroid-sparing agent in uveitis?

Blocks calcineurin, preventing IL-2 transcription and T-cell activation (Correct answer)
Depletes peripheral B lymphocytes via CD20 targeting
Inhibits TNF-alpha production by macrophages
Inhibits dihydrofolate reductase and lymphocyte proliferation

Correct answer: Blocks calcineurin, preventing IL-2 transcription and T-cell activation

Cyclosporine inhibits calcineurin, thereby blocking IL-2 gene transcription and T-cell activation, which is effective in immune-mediated uveitis requiring steroid-sparing therapy.

Question 40: A 62-year-old patient with poorly controlled diabetes and hypertension presents with the sudden onset of a droopy right eyelid and double vision. Examination reveals a complete ptosis and an eye that is deviated 'down and out.' The right pupil is 4mm and briskly reactive, identical to the left. Which of the following is the most likely etiology?

Posterior communicating artery aneurysm
Giant cell arteritis
Cavernous sinus thrombosis
Microvascular ischemia (Correct answer)

Correct answer: Microvascular ischemia

The patient presents with a classic pupil-sparing third nerve palsy. The oculomotor nerve (CN III) has pupillomotor fibers running on its periphery, which are susceptible to compression, while the main motor fibers are in the core. Microvascular ischemia, commonly due to diabetes or hypertension, affects the central, vasa nervorum-supplied part of the nerve, sparing the peripheral pupillary fibers. An aneurysm would typically compress the nerve from the outside, involving the pupil early. Cavernous sinus thrombosis would likely involve other cranial nerves (IV, V1, V2, VI). Giant cell arteritis is a less common cause and would usually present with other systemic symptoms.

Question 41: In a patient receiving long-term systemic corticosteroids for uveitis, which ocular complication is most characteristic of steroid use?

Anterior subcapsular cataract
Posterior subcapsular cataract (Correct answer)
Nuclear sclerotic cataract
Cortical cataract

Correct answer: Posterior subcapsular cataract

Posterior subcapsular cataracts (PSC) are the classic ocular complication of both systemic and topical corticosteroid use, developing in a dose- and duration-dependent manner.

Question 42: What optical principle explains why an IOL placed in the capsular bag requires less power than one placed in the anterior chamber?

Effective lens position closer to the retina requires less converging power (Correct answer)
Posterior chamber lenses benefit from corneal magnification
The aqueous humor amplifies posterior chamber lens power
The capsular bag has a higher refractive index

Correct answer: Effective lens position closer to the retina requires less converging power

A lens positioned closer to the retina (more posterior) requires less converging power to focus light on the fovea compared to a more anterior position.

Question 43: In a patient with pseudoexfoliation glaucoma, which characteristic finding is seen on slit-lamp examination?

Neovascularization of the iris
Posterior synechiae without prior inflammation
Pigment dispersion on the corneal endothelium in a Krukenberg spindle pattern
White flaky material on the anterior lens capsule (Correct answer)

Correct answer: White flaky material on the anterior lens capsule

Pseudoexfoliation glaucoma is characterized by white, dandruff-like fibrillar material deposited on the anterior lens capsule and pupillary margin.

Question 44: In a patient with pseudoexfoliation syndrome undergoing cataract surgery, which intraoperative complication is the surgeon most likely to encounter?

Corneal endothelial decompensation
Posterior capsule rupture from phaco energy
Zonular dialysis (Correct answer)
Suprachoroidal hemorrhage

Correct answer: Zonular dialysis

Pseudoexfoliation syndrome causes progressive zonular weakness, making zonular dialysis the most characteristic intraoperative complication during cataract surgery.

Question 45: A patient with a cycloplegic refraction of +5.00 D requires a spectacle lens at a vertex distance of 12 mm. What is the effective power at the corneal plane?

+5.00 D
+4.50 D
+5.31 D (Correct answer)
+4.72 D

Correct answer: +5.31 D

Using the effectivity formula, the effective power at a shorter vertex distance increases for plus lenses: +5.00 / (1 - 0.012 x 5.00) = +5.31 D.

Question 46: Which condition involves inflammation of the eyelid margins?

Keratitis
Episcleritis
Blepharitis (Correct answer)
Uveitis

Correct answer: Blepharitis

The Schirmer test is a common diagnostic procedure used to evaluate the quantity of tear production. It involves placing a small strip of filter paper inside the lower eyelid for a few minutes to measure the amount of moisture absorbed. This test helps in diagnosing dry eye conditions and assessing tear film function.

Question 47: A newborn is found to have bilateral white pupillary reflexes. After ruling out retinoblastoma, lens examination reveals dense bilateral cataracts. Which inherited metabolic disorder should be evaluated first?

Marfan syndrome
Fabry disease
Wilson disease
Galactosemia (Correct answer)

Correct answer: Galactosemia

Galactosemia is a critical metabolic cause of bilateral congenital cataracts that requires urgent dietary intervention to prevent systemic complications.

Question 48: In a patient with JIA-associated uveitis refractory to topical steroids and methotrexate, which biologic agent has FDA approval for this indication?

Rituximab
Infliximab
Adalimumab (Correct answer)
Tocilizumab

Correct answer: Adalimumab

Adalimumab (anti-TNF monoclonal antibody) received FDA approval for non-infectious intermediate, posterior, and panuveitis in pediatric patients, including JIA-associated uveitis refractory to conventional therapy.

Question 49: During evaluation of a corneal laceration, a dark tissue is noted plugging the wound. The anterior chamber is shallow compared to the fellow eye. What is the most critical next step?

Protect the eye with a rigid shield and arrange emergent surgical repair (Correct answer)
Apply topical antibiotics and patch the eye for 24 hours
Attempt to reposit the tissue at the slit lamp
Perform gonioscopy to evaluate the anterior chamber angle

Correct answer: Protect the eye with a rigid shield and arrange emergent surgical repair

Prolapsed uveal tissue plugging a corneal laceration with a shallow anterior chamber indicates an open globe requiring emergent surgical repair with a protective shield placed immediately.

Question 50: A 30-year-old man presents with floaters and blurred vision. Examination reveals snowbanking of the inferior pars plana and vitritis. What is the most likely diagnosis?

Vogt-Koyanagi-Harada disease
Intermediate uveitis (pars planitis) (Correct answer)
Toxoplasmic retinochoroiditis
Acute retinal necrosis

Correct answer: Intermediate uveitis (pars planitis)

Snowbanking over the inferior pars plana with vitritis is the hallmark finding of intermediate uveitis, also known as pars planitis.

Question 51: A 58-year-old woman with newly diagnosed, mild primary open-angle glaucoma (POAG) and ocular hypertension is treatment-naïve. According to the 6-year results of the Laser in Glaucoma and Ocular Hypertension (LiGHT) trial, which of the following is the most appropriate initial treatment to offer this patient for better long-term disease control and a lower rate of progression?

Immediate trabeculectomy
Selective Laser Trabeculoplasty (SLT) (Correct answer)
A topical beta-blocker
A topical prostaglandin analog

Correct answer: Selective Laser Trabeculoplasty (SLT)

The LiGHT trial's 6-year results demonstrated that initial treatment with Selective Laser Trabeculoplasty (SLT) was associated with better long-term disease control, a slower rate of visual field progression, and a reduced need for subsequent incisional surgery compared to initial treatment with IOP-lowering eye drops. For a treatment-naïve patient, SLT is therefore recommended as a first-line intervention.

Question 52: A 66-year-old man with a history of type 2 diabetes and hypertension presents with the sudden onset of horizontal double vision. Examination reveals an esotropia in the primary position that worsens on left gaze, with a clear limitation of abduction in the left eye. Pupillary function, eyelid position, and all other extraocular movements are normal. What is the most likely diagnosis?

Myasthenia Gravis
Cavernous sinus thrombosis
Microvascular sixth nerve palsy (Correct answer)
Third nerve palsy

Correct answer: Microvascular sixth nerve palsy

This is a classic presentation of an isolated sixth (abducens) nerve palsy, characterized by an abduction deficit. In a patient over 50 with vasculopathic risk factors like diabetes and hypertension, a microvascular ischemic etiology is the most common cause. The absence of other cranial nerve involvement, ptosis, or pupillary changes makes other diagnoses like cavernous sinus thrombosis or a third nerve palsy less likely.

Question 53: A 58-year-old man presents with sudden, painless, severe vision loss in his left eye upon waking. His vision is counting fingers. Examination shows a relative afferent pupillary defect and a swollen, hyperemic optic disc. The contralateral eye has a small cup-to-disc ratio ('disc at risk'). Which of the following is the most likely diagnosis?

Optic neuritis
Central retinal artery occlusion (CRAO)
Arteritic anterior ischemic optic neuropathy (A-AION)
Non-arteritic anterior ischemic optic neuropathy (NAION) (Correct answer)

Correct answer: Non-arteritic anterior ischemic optic neuropathy (NAION)

This is a classic presentation for Non-Arteritic Anterior Ischemic Optic Neuropathy (NAION), which typically causes sudden, painless, monocular vision loss, often noticed upon awakening. Key signs include optic disc edema and a contralateral 'disc at risk' (a small, crowded optic disc with little or no cupping). A-AION is less common, usually affects older patients, and is associated with systemic symptoms of giant cell arteritis. Optic neuritis typically presents with pain on eye movement and affects a younger demographic. A CRAO presents with a 'cherry-red spot' on fundus exam and optic disc swelling is not an initial feature.

Question 54: Which condition is most commonly associated with asteroid hyalosis?

Systemic hypertension
No consistent systemic association (Correct answer)
Hypercholesterolemia
Diabetes mellitus

Correct answer: No consistent systemic association

Despite earlier reports suggesting associations with diabetes mellitus, large population-based studies have shown no consistent systemic association with asteroid hyalosis.

Question 55: A patient presents with a complete third nerve palsy including pupil involvement after minor head trauma. CT angiography reveals a 7 mm aneurysm. What is the most likely location of this aneurysm?

Anterior communicating artery
Basilar tip
Middle cerebral artery bifurcation
Posterior communicating artery (Correct answer)

Correct answer: Posterior communicating artery

Posterior communicating artery aneurysms are the most common cause of a pupil-involving third nerve palsy due to compression of the parasympathetic fibers on the surface of the nerve.

Question 56: According to the Diabetic Retinopathy Clinical Research Network (DRCR.net) Protocol S, for patients with proliferative diabetic retinopathy (PDR), how did visual acuity outcomes at 2 years for treatment with intravitreal ranibizumab compare to panretinal photocoagulation (PRP)?

Ranibizumab was non-inferior to PRP. (Correct answer)
PRP was superior to ranibizumab.
Ranibizumab was superior to PRP.
The study was inconclusive regarding visual acuity.

Correct answer: Ranibizumab was non-inferior to PRP.

The DRCR.net Protocol S demonstrated that intravitreal ranibizumab was non-inferior to panretinal photocoagulation (PRP) for treating proliferative diabetic retinopathy with respect to visual acuity outcomes at 2 years. While the mean visual acuity was slightly better in the ranibizumab group, the primary outcome was non-inferiority. The ranibizumab group also experienced less peripheral visual field loss and had a lower rate of developing diabetic macular edema.

Question 57: What is the Prentice rule formula for calculating prismatic effect?

Prism (PD) = decentration (mm) x lens power (D)
Prism (PD) = decentration (cm) x lens power (D) (Correct answer)
Prism (PD) = decentration (cm) + lens power (D)
Prism (PD) = lens power (D) / decentration (cm)

Correct answer: Prism (PD) = decentration (cm) x lens power (D)

The Prentice rule states that prismatic effect in prism diopters equals the decentration in centimeters multiplied by the lens power in diopters.

Question 58: Which condition is characterized by progressive thinning of the cornea?

Scleritis
Conjunctivitis
Keratoconus (Correct answer)
Blepharitis

Correct answer: Keratoconus

Dry eye disease results from insufficient tear production or rapid tear evaporation, leading to inadequate lubrication of the eye surface. The most common and characteristic symptom is a persistent gritty, scratchy, or burning sensation in the eyes. This discomfort can be accompanied by redness, stinging, and sometimes reflex tearing.

Question 59: Which of the following findings is most consistent with a diagnosis of basal cell carcinoma of the eyelid?

Pearly nodule with rolled edges and loss of eyelashes (madarosis) (Correct answer)
Pigmented lesion with irregular borders
Painless yellow nodule with umbilicated center
Rapidly growing lesion with central ulceration and bleeding

Correct answer: Pearly nodule with rolled edges and loss of eyelashes (madarosis)

Basal cell carcinoma typically appears as a pearly, indurated nodule with rolled edges; loss of eyelashes (madarosis) is an important clinical sign.

Question 60: Which condition is most commonly associated with dissociated vertical deviation (DVD)?

Duane retraction syndrome
Intermittent exotropia
Infantile esotropia (Correct answer)
Brown syndrome

Correct answer: Infantile esotropia

DVD is strongly associated with infantile esotropia and occurs in up to 90% of cases over time.

Question 61: What is the hallmark finding on CT that distinguishes thyroid eye disease (Graves' orbitopathy) from orbital lymphoma?

Fusiform enlargement of extraocular muscles sparing the tendons (Correct answer)
Enhancement of the lacrimal gland
Irregular soft tissue mass with bone destruction
Diffuse orbital fat stranding

Correct answer: Fusiform enlargement of extraocular muscles sparing the tendons

Thyroid eye disease characteristically causes fusiform enlargement of extraocular muscle bellies while sparing the tendons, unlike most other orbital masses.

Question 62: Which of the following is the most common primary malignant orbital tumor in adults?

Optic nerve glioma
Lymphoma (Correct answer)
Rhabdomyosarcoma
Capillary hemangioma

Correct answer: Lymphoma

Orbital lymphoma (most often B-cell non-Hodgkin) is the most common primary malignant orbital tumor in adults.

Question 63: A patient with thyroid eye disease presents with restricted upgaze and elevated intraocular pressure on upgaze. Which extraocular muscle is most commonly affected in this condition?

Lateral rectus
Superior rectus
Medial rectus
Inferior rectus (Correct answer)

Correct answer: Inferior rectus

The inferior rectus is the most commonly affected extraocular muscle in thyroid eye disease, and its fibrotic enlargement restricts upgaze and increases IOP in that gaze position.

Question 64: A 58-year-old patient with a history of poorly controlled type 2 diabetes is diagnosed with high-risk proliferative diabetic retinopathy (PDR). According to the Diabetic Retinopathy Study (DRS), which of the following findings confers the highest risk for severe vision loss?

Neovascularization of the iris (NVI).
Hard exudates within the macula.
Four quadrants of intraretinal microvascular abnormalities (IRMA).
Neovascularization of the disc (NVD) greater than 1/3 disc area with associated vitreous hemorrhage. (Correct answer)

Correct answer: Neovascularization of the disc (NVD) greater than 1/3 disc area with associated vitreous hemorrhage.

The Diabetic Retinopathy Study (DRS) identified several high-risk characteristics for severe vision loss. The presence of neovascularization of the disc (NVD) greater than one-third of the disc area, especially when combined with pre-retinal or vitreous hemorrhage, is one of the most significant risk factors. While NVI is a severe complication, and extensive IRMA indicates severe non-proliferative disease, the specific high-risk criteria defined by the DRS point to NVD with hemorrhage as a critical finding requiring prompt treatment, typically panretinal photocoagulation (PRP).

Question 65: Which type of esotropia is characterized by a high accommodative convergence to accommodation (AC/A) ratio?

Infantile esotropia
Sensory esotropia
Partially accommodative esotropia with high AC/A ratio (Correct answer)
Duane syndrome

Correct answer: Partially accommodative esotropia with high AC/A ratio

A high AC/A ratio esotropia shows significantly more deviation at near than at distance, often requiring bifocal correction.

Question 66: In retinopathy of prematurity (ROP), at which zone does disease carry the worst prognosis?

Zone IV
Zone II
Zone I (Correct answer)
Zone III

Correct answer: Zone I

Zone I ROP involves the most posterior retina and carries the worst prognosis due to the large area of avascular retina.

Question 67: A 45-year-old patient with chronic anterior uveitis develops elevated intraocular pressure (IOP) refractory to topical beta-blockers and carbonic anhydrase inhibitors. The inflammation is currently well-controlled on a topical steroid. Which of the following would be the most appropriate next step in surgical management?

Trabeculectomy with mitomycin C
Implantation of a glaucoma drainage device (tube shunt) (Correct answer)
Argon Laser Trabeculoplasty (ALT)
Transscleral cyclophotocoagulation (CPC)

Correct answer: Implantation of a glaucoma drainage device (tube shunt)

In uveitic glaucoma, particularly with active or chronic inflammation, glaucoma drainage devices (tube shunts) are often the preferred first-line surgical intervention. Trabeculectomy has a higher failure rate due to inflammation-induced fibrosis, and laser trabeculoplasty can exacerbate inflammation. Cycloablative procedures are typically reserved for refractory cases as a last resort due to the risk of worsening inflammation and hypotony.

Question 68: A patient presents with bilateral granulomatous panuveitis, sunset glow fundus, vitiligo, poliosis, and alopecia. What is the most likely diagnosis?

Sarcoidosis
Vogt-Koyanagi-Harada syndrome (Correct answer)
Behçet disease
Sympathetic ophthalmia

Correct answer: Vogt-Koyanagi-Harada syndrome

VKH syndrome is characterized by bilateral granulomatous uveitis, sunset glow fundus from choroidal depigmentation, and extraocular findings including vitiligo, poliosis, and alopecia.

Question 69: Which vitamin supplementation regimen was shown by the AREDS2 study to reduce progression of intermediate to advanced age-related macular degeneration?

Vitamin B12 and folate
Vitamin D and omega-3 fatty acids
Vitamin C, vitamin E, lutein, zeaxanthin, and zinc (Correct answer)
Vitamin A and beta-carotene

Correct answer: Vitamin C, vitamin E, lutein, zeaxanthin, and zinc

The AREDS2 formula replaced beta-carotene with lutein and zeaxanthin, combined with vitamins C, E, and zinc, to safely reduce AMD progression risk.

Question 70: In a patient with retinitis pigmentosa, which electroretinography finding is expected?

Supranormal b-wave amplitude
Normal a-wave with reduced b-wave
Electronegative ERG with preserved a-wave
Markedly reduced or extinguished rod and cone responses (Correct answer)

Correct answer: Markedly reduced or extinguished rod and cone responses

Retinitis pigmentosa causes progressive photoreceptor degeneration leading to markedly reduced or extinguished rod responses followed by cone responses on full-field ERG.

Question 71: A 4-year-old boy presents with an intermittent exotropia that is well-controlled, occurring less than 50% of waking hours, primarily at distance when he is tired. His visual acuity is 20/20 in each eye, and stereopsis is excellent when his eyes are aligned. Refractive error is plano. Which of the following is the most appropriate initial management strategy?

Immediate bilateral lateral rectus muscle recession.
Prescription of over-minus lenses to stimulate accommodative convergence.
Part-time occlusion of the dominant eye for 2-3 hours per day.
Observation with follow-up in 6 months to monitor for progression. (Correct answer)

Correct answer: Observation with follow-up in 6 months to monitor for progression.

For a well-controlled intermittent exotropia in a young child with good visual acuity and stereopsis, observation is a very reasonable initial approach. Surgery is typically reserved for deviations that are poorly controlled (manifest >50% of the time), increasing in frequency, or associated with a loss of stereopsis or development of a suppression scotoma. While occlusion and over-minus lenses are sometimes used, observation is the most common and appropriate first step when control is good.

Question 72: What is the typical treatment for wet age-related macular degeneration?

Steroid eye drops
Anti-VEGF injections (Correct answer)
Laser photocoagulation
Oral antibiotics

Correct answer: Anti-VEGF injections

Wet age-related macular degeneration (AMD) involves the growth of abnormal, leaky blood vessels under the macula, causing vision loss. Anti-VEGF (vascular endothelial growth factor) injections work by blocking a protein that promotes this abnormal vessel growth. This treatment helps to reduce fluid leakage, prevent further damage to the macula, and often stabilizes or improves vision.

Question 73: Which condition is corrected using a cylindrical lens?

Astigmatism (Correct answer)
Presbyopia
Myopia
Hyperopia

Correct answer: Astigmatism

The near point of vision is the closest distance at which an object can be clearly focused by the eye through accommodation. For a young, healthy eye, this point is typically around 25 centimeters. As people age, the lens stiffens, and the near point recedes, a condition known as presbyopia.

Question 74: Which of the following is the most accurate method for measuring macular hole diameter to guide surgical prognosis?

Indirect ophthalmoscopy with scleral depression
B-scan ultrasonography
Spectral-domain OCT measurement of the minimum linear diameter (Correct answer)
Fluorescein angiography

Correct answer: Spectral-domain OCT measurement of the minimum linear diameter

Spectral-domain OCT provides precise measurement of the minimum linear diameter of a macular hole, which is the strongest predictor of anatomic closure after vitrectomy.

Question 75: A 60-year-old patient presents with sudden onset of vertical diplopia that worsens on downgaze and head tilt to the affected side. The Bielschowsky head tilt test is positive. Which cranial nerve is most likely affected?

Cranial nerve IV (trochlear) (Correct answer)
Cranial nerve III (oculomotor)
Cranial nerve V (trigeminal)
Cranial nerve VI (abducens)

Correct answer: Cranial nerve IV (trochlear)

A positive Bielschowsky head tilt test with vertical diplopia worsening on downgaze and ipsilateral head tilt is pathognomonic for a fourth cranial nerve (trochlear) palsy.

Question 76: A 58-year-old patient presents with an intraocular pressure of 34 mmHg, a cup-to-disc ratio of 0.8, and nasal step visual field defect. Which initial medical therapy is most appropriate?

Intravitreal anti-VEGF injection
Topical pilocarpine
Oral acetazolamide
Topical prostaglandin analog (Correct answer)

Correct answer: Topical prostaglandin analog

Topical prostaglandin analogs such as latanoprost are first-line therapy for primary open-angle glaucoma due to their efficacy and once-daily dosing.

Question 77: Which surgical procedure is commonly performed when medications fail to control IOP?

Laser iridotomy
Cataract extraction
Scleral buckling
Trabeculectomy (Correct answer)

Correct answer: Trabeculectomy

Acute angle-closure glaucoma is an ophthalmic emergency characterized by a sudden, sharp increase in intraocular pressure. The most common symptom is sudden, severe eye pain, often accompanied by headache, blurred vision, halos around lights, and nausea or vomiting. Immediate medical attention is crucial to prevent permanent vision loss.

Question 78: Which minimally invasive glaucoma surgery (MIGS) device is placed in Schlemm's canal to enhance conventional aqueous outflow?

Ex-PRESS shunt
Ahmed glaucoma valve
iStent (Correct answer)
Xen gel stent

Correct answer: iStent

The iStent is a trabecular micro-bypass stent placed into Schlemm's canal to improve physiologic aqueous outflow.

Question 79: A 24-year-old soft contact lens wearer presents with severe right eye pain that is disproportionate to clinical signs. Slit-lamp examination reveals a stromal ring infiltrate and radial keratoneuritis. What is the most specific diagnostic modality to confirm the suspected diagnosis?

In vivo confocal microscopy (Correct answer)
Polymerase chain reaction (PCR) for viral DNA
Specular microscopy of the endothelium
Corneal scraping with Gram stain and culture

Correct answer: In vivo confocal microscopy

The clinical presentation of severe pain out of proportion to signs, a ring infiltrate, and radial keratoneuritis in a contact lens wearer is highly suggestive of Acanthamoeba keratitis. In vivo confocal microscopy is a rapid, non-invasive imaging technique that allows for the direct visualization of Acanthamoeba cysts and trophozoites within the corneal stroma, providing a highly specific and timely diagnosis. While corneal scraping for culture is a gold standard, it can have low sensitivity and takes a long time. PCR is sensitive but not as specific for direct visualization. Specular microscopy is used to evaluate the endothelium.

Question 80: A 74-year-old female presents with an acute, profound, and painless loss of vision in her right eye. She also reports several weeks of new-onset headaches, scalp tenderness, and pain in her jaw when chewing. Examination reveals a pale, swollen optic disc in the right eye. What is the most critical immediate step in management?

Obtain a stat erythrocyte sedimentation rate (ESR) and C-reactive protein (CRP)
Schedule an MRI of the brain and orbits
Order an urgent temporal artery biopsy
Administer high-dose systemic corticosteroids immediately (Correct answer)

Correct answer: Administer high-dose systemic corticosteroids immediately

The clinical presentation is highly suggestive of giant cell arteritis (GCA) causing an arteritic anterior ischemic optic neuropathy (A-AION). This is a neuro-ophthalmic emergency. The most critical step is to immediately start high-dose systemic corticosteroids to prevent catastrophic, irreversible vision loss in the fellow eye. While labs and a temporal artery biopsy are necessary for diagnosis, treatment should not be delayed while awaiting these results.

Question 81: A 72-year-old patient with advanced glaucoma undergoes a trabeculectomy with mitomycin C. Three weeks post-operatively, his IOP is 2 mmHg, the anterior chamber is shallow, and fundus examination reveals choroidal effusions. The bleb is diffuse but there is no evidence of a leak on Seidel testing. What is the most likely cause of this patient's hypotony?

Pupillary block
Bleb failure due to scarring
Overfiltration through the scleral flap (Correct answer)
Aqueous misdirection (malignant glaucoma)

Correct answer: Overfiltration through the scleral flap

Post-operative hypotony with a shallow anterior chamber, choroidal effusions, and a diffuse, non-leaking bleb in the early period after a trabeculectomy is characteristic of overfiltration. The scleral flap is allowing too much aqueous to exit the anterior chamber. Aqueous misdirection would typically present with a high IOP. Pupillary block is unlikely in the presence of a patent iridectomy. Bleb failure would lead to high IOP.

Question 82: A 7-year-old with Down syndrome presents with esotropia. Which additional ocular finding is most commonly associated?

High accommodative convergence/accommodation ratio (Correct answer)
Aniridia
Persistent fetal vasculature
Brushfield spots

Correct answer: High accommodative convergence/accommodation ratio

Children with Down syndrome frequently have a high AC/A ratio contributing to their esotropia, in addition to other common findings like Brushfield spots.

Question 83: A patient presents with a shield ulcer at the superior cornea associated with giant papillae on the upper tarsal conjunctiva. Which condition is most likely responsible?

Bacterial keratitis
Exposure keratopathy
Neurotrophic keratopathy
Vernal keratoconjunctivitis (Correct answer)

Correct answer: Vernal keratoconjunctivitis

Shield ulcers are a hallmark complication of vernal keratoconjunctivitis, caused by mechanical trauma from giant papillae and inflammatory mediators on the superior corneal epithelium.

Question 84: A 62-year-old diabetic patient presents with neovascularization of the disc (NVD) covering more than one-third of the disc area. According to the Early Treatment Diabetic Retinopathy Study (ETDRS), what is the most appropriate next step?

Pars plana vitrectomy
Intravitreal anti-VEGF monotherapy
Observation with follow-up in 3 months
Prompt panretinal photocoagulation (Correct answer)

Correct answer: Prompt panretinal photocoagulation

The ETDRS established that high-risk proliferative diabetic retinopathy with NVD exceeding one-third disc area warrants prompt panretinal photocoagulation to reduce the risk of severe vision loss.

Question 85: Which finding on FFA is most characteristic of active Vogt-Koyanagi-Harada syndrome during the acute uveitic phase?

Extensive chorioretinal atrophy with window defects
Disc leakage only with no choroidal involvement
Retinal arterial occlusions with ischemic whitening
Multiple focal areas of subretinal fluid with pinpoint hyperfluorescent leaks at the RPE level (Correct answer)

Correct answer: Multiple focal areas of subretinal fluid with pinpoint hyperfluorescent leaks at the RPE level

Acute VKH shows multiple focal pinpoint hyperfluorescent leaks at the RPE level on FFA with pooling into subretinal fluid compartments, reflecting choroidal inflammation and disruption of the outer blood-retinal barrier.

Question 86: A 55-year-old patient presents with painless progressive binocular diplopia and inability to look upward or downward. MRI reveals a lesion in the rostral midbrain. Which eye movement abnormality is most specific to this localization?

Convergence-retraction nystagmus (Correct answer)
Periodic alternating nystagmus
See-saw nystagmus
Downbeat nystagmus

Correct answer: Convergence-retraction nystagmus

Convergence-retraction nystagmus is pathognomonic for dorsal midbrain lesions and occurs due to co-contraction of the extraocular muscles during attempted upward saccades.

Question 87: Which visual field test pattern is most specific for moderate glaucomatous progression beyond early disease?

Arcuate scotoma connecting to the blind spot (Correct answer)
Generalized constriction without focal defects
Bitemporal hemianopia
Central scotoma sparing the periphery

Correct answer: Arcuate scotoma connecting to the blind spot

An arcuate scotoma that connects to the physiologic blind spot follows the retinal nerve fiber layer pattern and is highly characteristic of moderate glaucomatous damage.

Question 88: A patient with proliferative diabetic retinopathy develops tractional retinal detachment involving the macula. What is the most appropriate management?

Intravitreal anti-VEGF injection alone
Pars plana vitrectomy (Correct answer)
Panretinal photocoagulation
Observation with serial imaging

Correct answer: Pars plana vitrectomy

Tractional retinal detachment involving the macula requires pars plana vitrectomy to relieve traction and reattach the retina to preserve central vision.

Question 89: Which optical instrument is commonly used to determine refractive errors?

Otoscope
Tonometer
Slit lamp
Phoropter (Correct answer)

Correct answer: Phoropter

Keratoconus is a progressive eye condition where the cornea, the clear front surface of the eye, thins and gradually bulges outward into a cone shape. This irregular curvature distorts vision, causing blurriness and light sensitivity. It often requires specialized contact lenses or surgical intervention for management.

Question 90: A 5-month-old infant is diagnosed with infantile esotropia. Which of the following clinical features is most characteristic of this condition?

Marked limitation of abduction due to sixth nerve palsy.
Profound unilateral amblyopia with a strong fixation preference.
A small, intermittent deviation that resolves with hyperopic correction.
A large-angle, constant esotropia (>30 prism diopters). (Correct answer)

Correct answer: A large-angle, constant esotropia (>30 prism diopters).

Infantile esotropia is defined by its onset before 6 months of age and is characterized by a large, constant angle of deviation, typically greater than 30 prism diopters. While amblyopia can occur, cross-fixation is common, leading to equal vision in many cases. The refractive error is usually only mildly hyperopic, and glasses do not correct the deviation. Apparent abduction deficits can be seen due to cross-fixation, but true palsies are not characteristic.

Question 91: A patient on chronic topical prostaglandin analog therapy develops progressive periorbital darkening and increased iris pigmentation. What is the most appropriate management?

Counsel the patient that changes are cosmetic and typically irreversible, then discuss whether to continue or switch therapy (Correct answer)
Immediately discontinue the medication
Add topical corticosteroids to counteract the pigmentation
Increase the dosage to achieve better IOP control

Correct answer: Counsel the patient that changes are cosmetic and typically irreversible, then discuss whether to continue or switch therapy

Prostaglandin-associated periorbital changes and iris darkening are cosmetic side effects; the decision to continue or switch should involve shared decision-making with the patient.

Question 92: Which subtype of juvenile idiopathic arthritis (JIA) carries the highest risk of developing chronic anterior uveitis?

Polyarticular RF-positive JIA
Enthesitis-related JIA
Oligoarticular JIA in ANA-positive young girls (Correct answer)
Systemic JIA (Still's disease)

Correct answer: Oligoarticular JIA in ANA-positive young girls

Oligoarticular JIA, particularly in young ANA-positive girls, carries up to a 30% risk of chronic asymptomatic anterior uveitis requiring regular slit-lamp screening.

Question 93: Which finding on cycloplegic refraction most strongly suggests accommodative esotropia in a 3-year-old?

Astigmatism greater than 2.00 D
Hyperopia of +4.00 D or greater (Correct answer)
Emmetropia with normal AC/A ratio
Myopia of -3.00 D

Correct answer: Hyperopia of +4.00 D or greater

Significant hyperopia drives excessive accommodative convergence, which is the hallmark mechanism of accommodative esotropia.

Question 94: A 30-year-old woman presents with transient visual obscurations, bilateral disc edema, and an enlarged blind spot on perimetry. Her BMI is 38. What is the most appropriate initial diagnostic study?

Fluorescein angiography
Electroretinography
Carotid Doppler ultrasound
MRI brain with MR venography (Correct answer)

Correct answer: MRI brain with MR venography

MRI with MR venography is essential to rule out cerebral venous sinus thrombosis before diagnosing idiopathic intracranial hypertension in a patient with papilledema.

Question 95: Which diagnostic finding on optical coherence tomography (OCT) is most characteristic of early glaucomatous damage?

Epiretinal membrane formation
Thinning of the retinal nerve fiber layer in the inferior temporal sector (Correct answer)
Subretinal fluid accumulation
Thickening of the central macular region

Correct answer: Thinning of the retinal nerve fiber layer in the inferior temporal sector

Early glaucomatous damage typically manifests as RNFL thinning, most commonly in the inferior temporal sector corresponding to the arcuate nerve fiber bundles.

Question 96: A patient with neovascular glaucoma secondary to proliferative diabetic retinopathy presents with IOP of 48 mmHg. What is the most important initial treatment to address the underlying cause?

Panretinal photocoagulation
Intravitreal anti-VEGF injection followed by panretinal photocoagulation (Correct answer)
Trabeculectomy with mitomycin C
Cyclophotocoagulation

Correct answer: Intravitreal anti-VEGF injection followed by panretinal photocoagulation

Intravitreal anti-VEGF rapidly regresses neovascularization while panretinal photocoagulation addresses the underlying retinal ischemia driving the disease.

Question 97: An A-pattern esotropia is characterized by a horizontal deviation that is:

Greater in upgaze than in downgaze. (Correct answer)
Associated with overaction of the inferior oblique muscles.
Equal in upgaze and downgaze but greater than in primary position.
Greater in downgaze than in upgaze.

Correct answer: Greater in upgaze than in downgaze.

Alphabetical patterns describe a change in the horizontal deviation in vertical gaze. In an A-pattern, the eyes converge more in upgaze and diverge more in downgaze, resembling the shape of the letter 'A'. Therefore, an A-pattern esotropia will have a larger esotropia measurement in upgaze compared to downgaze.

Question 98: A 6-year-old child presents with a complaint of an abnormal head posture, specifically a chin-up position. On examination, there is a marked limitation of elevation of the left eye when it is in the adducted position (looking up and to the right). Elevation in abduction is normal. What is the most likely diagnosis?

Brown syndrome (Correct answer)
Duane retraction syndrome Type 2
Superior rectus palsy
Inferior oblique palsy

Correct answer: Brown syndrome

Brown syndrome is characterized by a restrictive strabismus due to a tight or inelastic superior oblique tendon. The hallmark clinical sign is a limitation of elevation in adduction. Patients are often orthotropic in primary position but may adopt a chin-up head posture to maintain binocularity and avoid the field of restriction.

Question 99: What is the most common complication following Nd:YAG laser posterior capsulotomy for posterior capsule opacification?

IOL subluxation
Cystoid macular edema
Retinal detachment
Elevated intraocular pressure (Correct answer)

Correct answer: Elevated intraocular pressure

Transient elevation of intraocular pressure is the most frequent complication after Nd:YAG capsulotomy, typically occurring within the first few hours.

Question 100: A 55-year-old patient presents with a unilateral yellowish subretinal lesion and associated subretinal fluid. Ultrasound reveals acoustic hollowing. What is the most likely diagnosis?

Choroidal osteoma
Choroidal hemangioma
Congenital hypertrophy of the RPE
Choroidal melanoma (Correct answer)

Correct answer: Choroidal melanoma

A dome-shaped subretinal lesion with acoustic hollowing on B-scan ultrasonography is characteristic of choroidal melanoma.

Question 101: Which type of astigmatism is present when one focal line falls in front of the retina and the other falls behind it?

Simple myopic astigmatism
Compound hyperopic astigmatism
Mixed astigmatism (Correct answer)
Simple hyperopic astigmatism

Correct answer: Mixed astigmatism

Mixed astigmatism occurs when the two principal meridians focus on opposite sides of the retina.

Question 102: A 62-year-old man with giant cell arteritis develops sudden bilateral vision loss. ESR is 95 mm/hr and CRP is elevated. What is the most critical immediate treatment?

Oral aspirin 325 mg daily
Intravitreal anti-VEGF injection
High-dose intravenous methylprednisolone (Correct answer)
Plasma exchange therapy

Correct answer: High-dose intravenous methylprednisolone

High-dose IV methylprednisolone is the standard urgent treatment for GCA-related vision loss to prevent further ischemic damage to the fellow eye and other organs.

Question 103: A child presents with proptosis, erythema, and restricted ocular motility following a sinus infection. CT shows subperiosteal abscess. What is the most appropriate next step?

Topical steroids
Oral antibiotics alone
Observation for 48 hours
IV antibiotics and surgical drainage (Correct answer)

Correct answer: IV antibiotics and surgical drainage

A subperiosteal abscess (Chandler stage IV orbital cellulitis) requires prompt IV antibiotics and surgical drainage to prevent vision loss and intracranial spread.

Question 104: A 70-year-old male presents with acute, painless vision loss in his left eye. Fundus examination reveals diffuse retinal hemorrhages in all four quadrants, cotton-wool spots, venous tortuosity, and optic disc swelling. Fluorescein angiography shows delayed venous filling and capillary nonperfusion. What is the most appropriate initial treatment for associated macular edema?

Intravitreal anti-VEGF injection (Correct answer)
Chorioretinal venous anastomosis
Pars plana vitrectomy
Panretinal photocoagulation (PRP)

Correct answer: Intravitreal anti-VEGF injection

The clinical picture is classic for a central retinal vein occlusion (CRVO). The primary cause of vision loss in CRVO is macular edema. The current first-line, evidence-based treatment for macular edema secondary to CRVO is intravitreal injection of an anti-vascular endothelial growth factor (anti-VEGF) agent (e.g., aflibercept, ranibizumab, bevacizumab). PRP is used to treat neovascularization, not directly for macular edema. Vitrectomy and chorioretinal anastomosis are reserved for specific complications and are not initial treatments for macular edema.

Question 105: A patient presents with a unilateral, chronic, red eye with a strawberry-like papillary reaction on the upper tarsal conjunctiva. What is the most likely diagnosis?

Trachoma
Floppy eyelid syndrome
Vernal keratoconjunctivitis
Giant papillary conjunctivitis (Correct answer)

Correct answer: Giant papillary conjunctivitis

Giant papillary conjunctivitis is characterized by large cobblestone-like papillae on the upper tarsal conjunctiva, commonly associated with contact lens wear or ocular prostheses.

Question 106: A patient undergoes automated perimetry which reveals a bitemporal hemianopia that respects the vertical midline. A lesion at which of the following locations would best explain this visual field defect?

Optic tract
Occipital cortex
Optic nerve
Optic chiasm (Correct answer)

Correct answer: Optic chiasm

The optic chiasm is the location where the nasal retinal fibers from each eye, which are responsible for the temporal visual fields, cross to the opposite side of the brain. A compressive lesion at the chiasm, most commonly a pituitary adenoma, will damage these crossing fibers, resulting in a loss of vision in the temporal fields of both eyes, known as a bitemporal hemianopia. Lesions of the optic nerve cause monocular field defects, while lesions posterior to the chiasm (optic tract, occipital cortex) cause homonymous hemianopias (affecting the same side of the visual field in both eyes).

Question 107: Which type of glaucoma is most commonly associated with elevated episcleral venous pressure?

Sturge-Weber syndrome-associated glaucoma (Correct answer)
Steroid-induced glaucoma
Normal-tension glaucoma
Pigmentary glaucoma

Correct answer: Sturge-Weber syndrome-associated glaucoma

Sturge-Weber syndrome causes elevated episcleral venous pressure from arteriovenous malformations, which impedes aqueous outflow and leads to secondary glaucoma.

Question 108: Which of the following findings is most characteristic of Normal-Tension Glaucoma (NTG)?

Peripheral anterior synechiae on gonioscopy.
Optic disc hemorrhages. (Correct answer)
Intraocular pressures consistently above 25 mmHg.
A deep, centrally located visual field defect.

Correct answer: Optic disc hemorrhages.

Normal-Tension Glaucoma (NTG) is characterized by glaucomatous optic neuropathy in the setting of statistically normal intraocular pressures. While many features overlap with POAG, optic disc hemorrhages (Drance hemorrhages) are found more frequently in patients with NTG and are often a sign of disease progression. Visual field defects in NTG are often closer to fixation than in POAG. High IOP is contrary to the definition of NTG. Peripheral anterior synechiae are a sign of angle-closure glaucoma.

Question 109: Which of the following medications acts by decreasing aqueous humor production AND increasing uveoscleral outflow?

Brimonidine (Correct answer)
Timolol
Pilocarpine
Latanoprost

Correct answer: Brimonidine

Brimonidine, an alpha-2 agonist, has a dual mechanism of reducing aqueous production and enhancing uveoscleral outflow.

Question 110: What is the approximate accommodative demand for a 2.50 D myope who removes their spectacles to read at 40 cm?

4.00 D
1.50 D
2.50 D
0 D (Correct answer)

Correct answer: 0 D

A -2.50 D myope has a far point at 40 cm, so reading at 40 cm without glasses requires essentially no accommodation.

Question 111: Which finding on examination is pathognomonic for Duane retraction syndrome Type I?

Exotropia worse at near
Limitation of elevation in adduction
Globe retraction with narrowing of the palpebral fissure on adduction (Correct answer)
Inability to depress the eye in adduction

Correct answer: Globe retraction with narrowing of the palpebral fissure on adduction

Globe retraction with palpebral fissure narrowing on attempted adduction is the hallmark of Duane syndrome, caused by co-contraction of the horizontal rectus muscles.

Question 112: Which staining pattern on rose bengal is most characteristic of keratoconjunctivitis sicca?

Interpalpebral conjunctival and corneal staining (Correct answer)
Inferior punctate staining only
Diffuse confluent corneal staining
Superior limbal staining

Correct answer: Interpalpebral conjunctival and corneal staining

Rose bengal stains devitalized and unprotected epithelial cells, producing a characteristic interpalpebral pattern in dry eye disease where tear film exposure is greatest.

Question 113: What is the most common cause of infectious posterior uveitis in immunocompetent patients in the United States?

Candida albicans
Herpes simplex virus (HSV)
Toxoplasma gondii (Correct answer)
Cytomegalovirus (CMV)

Correct answer: Toxoplasma gondii

Toxoplasma gondii is the most common cause of infectious posterior uveitis in immunocompetent individuals, presenting as focal retinochoroiditis typically adjacent to an old pigmented scar.

Question 114: A patient with intermediate uveitis shows 'snowballs' in the vitreous and 'snowbanking' over the pars plana. Which condition is most likely?

Vogt-Koyanagi-Harada syndrome
Behçet disease
Sympathetic ophthalmia
Pars planitis (Correct answer)

Correct answer: Pars planitis

Pars planitis is a form of idiopathic intermediate uveitis characterized by vitreous snowballs and snowbank (exudate) formation overlying the pars plana.

Question 115: Which type of retinal detachment is most commonly associated with intraocular tumors such as choroidal melanoma?

Combined tractional-rhegmatogenous detachment
Rhegmatogenous retinal detachment
Tractional retinal detachment
Exudative retinal detachment (Correct answer)

Correct answer: Exudative retinal detachment

Intraocular tumors cause exudative (serous) retinal detachment by disrupting the blood-retinal barrier and producing subretinal fluid without a retinal break.

Question 116: Which intraocular lens formula is most appropriate for eyes with axial lengths shorter than 22 mm?

Hoffer Q (Correct answer)
SRK/T
Haigis
Holladay 1

Correct answer: Hoffer Q

The Hoffer Q formula is most accurate for short eyes with axial lengths under 22 mm due to its superior effective lens position prediction in these cases.

Question 117: A patient undergoes trabeculectomy and presents on postoperative day 2 with a shallow anterior chamber, low IOP, and a large diffuse bleb. What is the most likely cause?

Overfiltration (Correct answer)
Bleb leak
Suprachoroidal hemorrhage
Aqueous misdirection

Correct answer: Overfiltration

A shallow chamber with low IOP and a large bleb in the early postoperative period is most consistent with overfiltration through the sclerostomy.

Question 118: What is the mechanism of action of beta-blockers in glaucoma treatment?

Stimulate pupil dilation
Enhance retinal blood flow
Decrease aqueous humor production (Correct answer)
Increase tear production

Correct answer: Decrease aqueous humor production

Trabeculectomy is a surgical procedure performed when medications and laser treatments are insufficient to control intraocular pressure in glaucoma. It involves creating a new drainage pathway for aqueous humor, allowing it to filter out of the eye. This reduces pressure and helps prevent further optic nerve damage.

Question 119: Which investigation is most important before performing strabismus surgery in a child with a recently acquired esotropia and no clear accommodative component?

MRI brain with attention to posterior fossa (Correct answer)
CT orbits
Genetic testing for CFEOM
Electroretinography

Correct answer: MRI brain with attention to posterior fossa

Acquired non-accommodative esotropia in a child warrants MRI of the brain to rule out posterior fossa pathology such as Chiari malformation or tumor.

Question 120: A 62-year-old phakic patient presents with an uncomplicated rhegmatogenous retinal detachment involving a single horseshoe tear at the 11 o'clock position with subretinal fluid extending just posterior to the equator but not involving the macula. Which of the following surgical options is generally considered the LEAST invasive procedure with a reasonable success rate for this specific presentation?

Pneumatic retinopexy. (Correct answer)
Pars plana vitrectomy with gas tamponade.
Laser retinopexy alone.
Scleral buckle.

Correct answer: Pneumatic retinopexy.

Pneumatic retinopexy is a minimally invasive procedure best suited for uncomplicated retinal detachments with retinal breaks located in the superior portion of the retina (typically between 8 and 4 o'clock). It involves injecting a gas bubble into the vitreous cavity to tamponade the retinal break, followed by cryotherapy or laser to create a permanent adhesion. While vitrectomy and scleral buckling are also effective, they are more invasive procedures. Laser alone is insufficient to reattach the retina.

Question 121: What is the typical first-line treatment for bacterial conjunctivitis?

Artificial tears only
Oral steroids
Topical antibiotics (Correct answer)
Antihistamines

Correct answer: Topical antibiotics

Blepharitis is a chronic inflammatory condition affecting the eyelid margins, often caused by bacterial overgrowth or dysfunction of the meibomian glands. Key symptoms include redness, itching, irritation, and crusting of the eyelashes, along with a persistent gritty sensation in the eyes.

Question 122: A 2-year-old has an abduction deficit of the left eye with narrowing of the palpebral fissure on attempted adduction. What is the diagnosis?

Left Duane retraction syndrome type I (Correct answer)
Left Mobius syndrome
Left medial rectus restriction
Left sixth nerve palsy

Correct answer: Left Duane retraction syndrome type I

Duane retraction syndrome type I features limited abduction with globe retraction and palpebral fissure narrowing on adduction due to co-innervation of the lateral rectus.

Question 123: What is the recommended initial treatment for zone 1 retinopathy of prematurity (ROP) with plus disease?

Observation with serial examinations
Cryotherapy to the avascular retina
Intravitreal anti-VEGF injection (Correct answer)
Pars plana vitrectomy with lensectomy

Correct answer: Intravitreal anti-VEGF injection

Intravitreal anti-VEGF injection has become the preferred first-line treatment for zone 1 ROP with plus disease due to superior structural outcomes compared to laser in this posterior location.

Question 124: Which visual field defect is classically associated with a branch retinal artery occlusion affecting the superior temporal arcade?

Homonymous hemianopia
Superior altitudinal defect
Central scotoma
Inferior nasal scotoma (Correct answer)

Correct answer: Inferior nasal scotoma

A branch retinal artery occlusion of the superior temporal arcade causes ischemia to the corresponding retinal area, resulting in an inferior nasal visual field defect.

Question 125: When light passes from a medium with refractive index 1.33 into a medium with refractive index 1.00, at an angle of incidence of 30 degrees, what is the approximate angle of refraction?

41.7 degrees (Correct answer)
22.1 degrees
30.0 degrees
60.0 degrees

Correct answer: 41.7 degrees

Applying Snell's law: 1.33 × sin(30°) = 1.00 × sin(θ), giving sin(θ) = 0.665 and θ ≈ 41.7 degrees.

Question 126: A patient with a known pituitary macroadenoma presents with progressive visual field loss. Which visual field pattern is most expected?

Binasal hemianopia
Bitemporal hemianopia (Correct answer)
Right homonymous hemianopia
Bilateral central scotomas

Correct answer: Bitemporal hemianopia

A pituitary macroadenoma compresses the optic chiasm from below, preferentially damaging the crossing nasal fibers and producing a bitemporal hemianopia.

Question 127: A 28-year-old male presents with a sudden, painless 'curtain' over the vision in his right eye, preceded by flashes of light and new floaters for two days. On examination, a bullous elevation of the neurosensory retina is noted in the superior temporal quadrant. What is the most likely diagnosis?

Central serous chorioretinopathy
Rhegmatogenous retinal detachment (Correct answer)
Tractional retinal detachment
Exudative retinal detachment

Correct answer: Rhegmatogenous retinal detachment

The classic presentation of flashes (photopsia), floaters, and a progressive visual field defect ('curtain') is highly suggestive of a rhegmatogenous retinal detachment (RRD). This type of detachment is caused by a full-thickness break in the retina that allows liquefied vitreous to pass into the subretinal space. Tractional detachments are typically more concave and seen in proliferative diseases, while exudative detachments are caused by underlying inflammation or tumors and often shift with patient position.

Question 128: Weeks after penetrating trauma to the right eye, a patient develops inflammation in the uninjured left eye. What is the diagnosis?

Phacoanaphylactic uveitis
Sympathetic ophthalmia (Correct answer)
Bacterial endophthalmitis
Posner-Schlossman syndrome

Correct answer: Sympathetic ophthalmia

Sympathetic ophthalmia is a bilateral granulomatous panuveitis arising after penetrating trauma or surgery to one eye (the exciting eye), affecting the fellow sympathizing eye via autoimmune sensitization to uveal antigens.

Question 129: Which layer of the cornea is most responsible for maintaining corneal deturgescence and transparency?

Descemet membrane
Corneal endothelium (Correct answer)
Bowman layer
Corneal epithelium

Correct answer: Corneal endothelium

The corneal endothelium actively pumps fluid out of the stroma via Na+/K+-ATPase, maintaining the relative dehydration essential for corneal transparency.

Question 130: Which microorganism is most commonly associated with contact lens-related keratitis?

Staphylococcus epidermidis
Pseudomonas aeruginosa (Correct answer)
Candida albicans
Herpes simplex virus

Correct answer: Pseudomonas aeruginosa

Bacterial conjunctivitis is an infection of the conjunctiva, typically presenting with redness, discharge, and irritation. The first-line treatment involves topical antibiotic eye drops or ointments. These medications effectively target and eliminate the bacteria, reducing symptoms and preventing the spread of the infection.

Question 131: A 55-year-old woman with a history of hyperthyroidism presents with chronic irritation, redness, and a foreign body sensation in both eyes. Examination reveals papillary hypertrophy of the superior tarsal conjunctiva, inflammation and redundancy of the superior bulbar conjunctiva, and fine punctate staining of the superior cornea. What is the most likely diagnosis?

Ocular Cicatricial Pemphigoid
Vernal keratoconjunctivitis
Trachoma
Superior Limbic Keratoconjunctivitis (SLK) (Correct answer)

Correct answer: Superior Limbic Keratoconjunctivitis (SLK)

Superior Limbic Keratoconjunctivitis (SLK) is characterized by inflammation specifically affecting the superior bulbar and tarsal conjunctiva. The constellation of findings described is classic for SLK, which has a strong association with thyroid eye disease, particularly hyperthyroidism. [3, 19, 26, 29, 30] The other conditions have different characteristic signs and locations of involvement.

Question 132: Which imaging modality is preferred for evaluating suspected optic nerve sheath meningioma?

Ultrasound B-scan
Plain X-ray of the orbits
CT with contrast
MRI with fat suppression and gadolinium (Correct answer)

Correct answer: MRI with fat suppression and gadolinium

MRI with fat suppression and gadolinium contrast best demonstrates the tram-track sign and soft tissue extent of optic nerve sheath meningioma.

Question 133: Which finding on optical coherence tomography (OCT) is most characteristic of central serous chorioretinopathy (CSC)?

Disruption of the ellipsoid zone with subretinal fibrosis
Intraretinal cystic spaces with petaloid pattern
Hyperreflective foci within the outer nuclear layer
Subretinal fluid with a neurosensory detachment and possible pigment epithelial detachment (Correct answer)

Correct answer: Subretinal fluid with a neurosensory detachment and possible pigment epithelial detachment

CSC classically demonstrates a dome-shaped neurosensory detachment with subretinal fluid accumulation, often accompanied by a pigment epithelial detachment on OCT.

Question 134: What is the primary symptom of dry eye disease?

Gritty or burning sensation (Correct answer)
Double vision
Sudden vision loss
Itchy scalp

Correct answer: Gritty or burning sensation

Pseudomonas aeruginosa is a highly aggressive bacterium frequently implicated in severe contact lens-related keratitis. This microorganism can rapidly cause corneal ulcers and significant vision loss due to its ability to adhere to contact lenses and produce damaging toxins. Prompt diagnosis and treatment are crucial to prevent serious complications.

Question 135: What type of lens is used to correct myopia?

Concave lens (Correct answer)
Convex lens
Cylindrical lens
Plano lens

Correct answer: Concave lens

Myopia, or nearsightedness, occurs when the eye focuses light in front of the retina, causing distant objects to appear blurry. A concave lens diverges light rays before they enter the eye, effectively shifting the focal point backward onto the retina. This correction allows for clear vision of distant objects.

Question 136: Which finding on OCT is most characteristic of central serous chorioretinopathy?

Full-thickness macular hole with operculum
Epiretinal membrane with retinal folds
Intraretinal cystoid spaces with hard exudates
Neurosensory retinal detachment with subretinal fluid (Correct answer)

Correct answer: Neurosensory retinal detachment with subretinal fluid

Central serous chorioretinopathy classically presents on OCT as a dome-shaped neurosensory retinal detachment with an optically clear space of subretinal fluid.

Question 137: A 68-year-old glaucoma suspect is being monitored with annual spectral-domain OCT of the retinal nerve fiber layer (RNFL). According to glaucoma progression analysis software and established research, which of the following changes in average RNFL thickness would be most suspicious for true glaucomatous progression, exceeding expected age-related thinning?

A decrease of 0.5 µm over one year
A decrease of 5 µm over two years (Correct answer)
A decrease of 2 µm over five years
An increase of 3 µm over one year

Correct answer: A decrease of 5 µm over two years

While age-related RNFL thinning occurs at a rate of approximately -0.5 µm/year, glaucomatous progression is marked by a faster rate of loss. An event-based change of 5 µm or more is considered suspicious for progression. A decrease of 5 µm over two years (-2.5 µm/year) is significantly faster than age-related loss and highly indicative of true glaucomatous progression, warranting consideration for treatment initiation.

Question 138: A patient with acute retinal necrosis syndrome should be treated initially with which antiviral agent?

Intravenous acyclovir (Correct answer)
Topical ganciclovir
Oral valacyclovir alone
Intravitreal foscarnet alone

Correct answer: Intravenous acyclovir

Acute retinal necrosis requires aggressive treatment with intravenous acyclovir to control the viral infection and prevent fellow eye involvement.

Question 139: What is a common symptom of retinal detachment?

Headache
Flashes of light and floaters (Correct answer)
Eye itching
Nasal congestion

Correct answer: Flashes of light and floaters

Proliferative diabetic retinopathy is an advanced stage of diabetic eye disease marked by the growth of new, abnormal blood vessels (neovascularization) on the retina's surface. These fragile vessels are prone to bleeding into the vitreous or forming scar tissue, which can lead to severe vision loss or retinal detachment. Early detection and treatment are vital.

Question 140: A patient with pseudoexfoliation syndrome is found to have unilateral elevated IOP of 28 mmHg. What mechanism most likely accounts for the pressure elevation?

Trabecular meshwork obstruction by exfoliative material (Correct answer)
Ciliary body swelling
Pupillary block from posterior synechiae
Neovascularization of the angle

Correct answer: Trabecular meshwork obstruction by exfoliative material

Pseudoexfoliative material accumulates in the trabecular meshwork, reducing aqueous outflow and causing elevated intraocular pressure.

Question 141: A patient presents with bilateral vitritis, retinal vasculitis, and candle-wax drippings along retinal venules. What is the most likely systemic diagnosis?

Tuberculosis
Sarcoidosis (Correct answer)
Behcet disease
Systemic lupus erythematosus

Correct answer: Sarcoidosis

Candle-wax drippings (taches de bougie) along retinal venules are a hallmark of ocular sarcoidosis with granulomatous periphlebitis.

Question 142: During Jackson cross-cylinder testing at axis 90 degrees, the patient reports the red dot (minus axis at 90) is clearer. What adjustment should be made?

Rotate the correcting cylinder axis toward 180 degrees
Decrease the sphere power
Increase the cylinder power
Rotate the correcting cylinder axis toward 90 degrees (Correct answer)

Correct answer: Rotate the correcting cylinder axis toward 90 degrees

When the patient prefers the minus axis position, the correcting cylinder axis should be rotated toward that position.

Question 143: A 35-year-old male presents with progressive, painless blurring of vision. Refraction reveals high against-the-rule astigmatism. Corneal topography shows a narrow band of inferior thinning from the 4 o'clock to the 8 o'clock position, located 1-2 mm from the limbus, with steepening of the cornea just superior to this band. The central cornea is of normal thickness. This presentation is most characteristic of which condition?

Pellucid Marginal Degeneration (Correct answer)
Posterior Keratoconus
Central (nipple cone) Keratoconus
Keratoglobus

Correct answer: Pellucid Marginal Degeneration

This description is the classic presentation of Pellucid Marginal Degeneration (PMD). Key features are the peripheral band of inferior thinning (typically 4 to 8 o'clock) located 1-2 mm from the limbus, with the area of maximum protrusion occurring just superior to the thinned area, leading to high against-the-rule astigmatism. This creates a characteristic "crab claw" or "kissing doves" appearance on topography. Keratoconus typically involves central or paracentral thinning and protrusion, while keratoglobus involves global corneal thinning.

Question 144: What is the preferred initial treatment for a 3-year-old with unilateral amblyopia and visual acuity of 20/80 in the amblyopic eye?

Atropine penalization daily in both eyes
Full-time occlusion of the sound eye
Immediate strabismus surgery
2 hours per day of patching the sound eye (Correct answer)

Correct answer: 2 hours per day of patching the sound eye

For moderate amblyopia (20/40 to 20/100), the PEDIG studies demonstrated that 2 hours of daily patching is as effective as 6 hours.

Question 145: A 45-year-old contact lens wearer presents with a ring-shaped corneal infiltrate and severe pain. Culture reveals Acanthamoeba. What is the most appropriate initial treatment?

Topical fluoroquinolone monotherapy
Oral acyclovir
Topical natamycin alone
Polyhexamethylene biguanide (PHMB) with propamidine (Correct answer)

Correct answer: Polyhexamethylene biguanide (PHMB) with propamidine

Acanthamoeba keratitis is treated with dual therapy using a biguanide (PHMB or chlorhexidine) combined with a diamidine (propamidine) to target both trophozoites and cysts.

Question 146: Which unit measures the refractive power of a lens?

Lux
Candela
Lumen
Diopter (Correct answer)

Correct answer: Diopter

The diopter is the standard unit used to measure the refractive power of a lens. It is defined as the reciprocal of the focal length in meters. A higher diopter value indicates a stronger lens that bends light more significantly, making it crucial for prescribing corrective eyewear.

Question 147: A patient undergoes keratometry revealing readings of 44.00 D at 90 degrees and 42.00 D at 180 degrees. What is the type and amount of corneal astigmatism?

2.00 D with-the-rule astigmatism (Correct answer)
1.00 D with-the-rule astigmatism
2.00 D against-the-rule astigmatism
2.00 D oblique astigmatism

Correct answer: 2.00 D with-the-rule astigmatism

The steeper meridian at 90 degrees with 2.00 D difference defines with-the-rule corneal astigmatism.

Question 148: An eye's refractive state is such that parallel rays of light form two focal lines. The vertical focal line is focused 1.00 D in front of the retina, while the horizontal focal line is focused directly on the retina. How is this refractive error best classified?

Mixed astigmatism
Compound myopic astigmatism
Simple myopic astigmatism (Correct answer)
Simple hyperopic astigmatism

Correct answer: Simple myopic astigmatism

This condition describes simple myopic astigmatism. In this type of astigmatism, one of the principal meridians is myopic (focuses light in front of the retina), while the other meridian is emmetropic (focuses light directly on the retina). Compound myopic astigmatism would have both focal lines in front of the retina, and simple hyperopic astigmatism would have one line on the retina and one behind it. [12, 15, 29]

Question 149: A 45-year-old myopic male presents with pigment dispersion on the corneal endothelium in a Krukenberg spindle pattern. What is the most likely underlying mechanism for potential IOP elevation?

Angle neovascularization from retinal ischemia
Liberation of iris pigment granules that clog the trabecular meshwork (Correct answer)
Lens subluxation causing pupillary block
Inflammatory trabecular edema

Correct answer: Liberation of iris pigment granules that clog the trabecular meshwork

In pigmentary dispersion syndrome, mechanical rubbing of the posterior iris against the zonules releases pigment granules that obstruct the trabecular meshwork.

Question 150: When comparing Descemet's Membrane Endothelial Keratoplasty (DMEK) to Descemet's Stripping Automated Endothelial Keratoplasty (DSAEK) for the treatment of Fuchs' Endothelial Dystrophy, DMEK is generally associated with which of the following outcomes?

Higher rates of primary graft failure
A technically less challenging surgical procedure
Lower rates of allograft rejection (Correct answer)
Slower visual recovery

Correct answer: Lower rates of allograft rejection

DMEK involves transplanting only Descemet's membrane and endothelium, a thinner graft with less donor tissue than DSAEK (which includes posterior stroma). This is associated with faster visual recovery, better final visual acuity, and a significantly lower rate of immunologic graft rejection. [21, 24, 28, 32] However, DMEK is considered more technically challenging than DSAEK, with a higher rate of complications like graft detachment requiring rebubbling.

Question 151: A 62-year-old diabetic patient presents with tractional retinal detachment involving the macula. What is the most appropriate surgical intervention?

Scleral buckle alone
Intravitreal anti-VEGF injection only
Pars plana vitrectomy with membrane peeling (Correct answer)
Pneumatic retinopexy

Correct answer: Pars plana vitrectomy with membrane peeling

Tractional retinal detachment involving the macula in proliferative diabetic retinopathy requires pars plana vitrectomy with membrane peeling to relieve traction and reattach the retina.

Question 152: What is the function of the macula?

Light regulation
Night vision
Central vision and color perception (Correct answer)
Peripheral vision

Correct answer: Central vision and color perception

The macula is a small, highly sensitive area in the center of the retina, densely packed with cone photoreceptors. These specialized cells are responsible for our sharpest, most detailed vision, enabling us to see fine details and perceive colors. Therefore, the macula is crucial for central vision and tasks like reading and recognizing faces.

Question 153: Which of the following corneal dystrophies is characterized by an autosomal recessive inheritance pattern and the deposition of glycosaminoglycans (mucin) within the corneal stroma?

Lattice Dystrophy
Macular Dystrophy (Correct answer)
Fuchs' Endothelial Dystrophy
Granular Dystrophy

Correct answer: Macular Dystrophy

Macular Dystrophy is a classic autosomal recessive disorder caused by mutations in the CHST6 gene. This leads to the abnormal synthesis of proteoglycans and the accumulation of glycosaminoglycans (demonstrated by Alcian blue stain) in the stroma, keratocytes, and endothelium, causing diffuse corneal clouding and early vision loss. In contrast, Lattice (amyloid deposits) and Granular (hyaline deposits) dystrophies are typically autosomal dominant. Fuchs' dystrophy primarily affects the endothelium and is usually autosomal dominant or sporadic.

Question 154: A patient is evaluated on postoperative day 1 after uneventful phacoemulsification. They report minimal pain but significant blurriness. Examination reveals 20/200 vision, diffuse limbus-to-limbus corneal edema, and a deep, quiet anterior chamber with 1+ cell and no fibrin or hypopyon. What is the most likely diagnosis?

UGH (Uveitis-Glaucoma-Hyphema) Syndrome
Retained cortical fragment
Infectious endophthalmitis
Toxic Anterior Segment Syndrome (TASS) (Correct answer)

Correct answer: Toxic Anterior Segment Syndrome (TASS)

Toxic Anterior Segment Syndrome (TASS) is a sterile inflammatory reaction that typically presents within 12-24 hours of surgery. The hallmark signs are diffuse, limbus-to-limbus corneal edema and a significant anterior chamber reaction that is out of proportion to any pain and lacks the classic signs of infection like a hypopyon or significant vitritis. Infectious endophthalmitis usually presents later (3-7 days), with more severe pain, and often involves the vitreous.

Question 155: A 72-year-old patient is seen on postoperative day 1 after Descemet's Membrane Endothelial Keratoplasty (DMEK). The cornea is edematous, and a large, partially detached but correctly oriented graft is noted in the anterior chamber. What is the most appropriate next step in management?

Perform a rebubbling procedure with air or gas (Correct answer)
Proceed immediately with a full-thickness penetrating keratoplasty (PKP)
Prescribe topical hypertonic saline and observe for one week
Start high-dose oral corticosteroids to reduce inflammation

Correct answer: Perform a rebubbling procedure with air or gas

A large, clinically significant graft detachment is the most common complication after DMEK and requires intervention. The standard of care is to perform a "rebubbling" procedure, which involves injecting an air or gas bubble into the anterior chamber to push the graft back into apposition with the host stroma. This is often successful and avoids the need for a more invasive procedure. Proceeding to PKP is overly aggressive. Observation or medical management alone is insufficient for a large mechanical detachment.

Question 156: A construction worker presents to the emergency department immediately after a large splash of wet cement (an alkali substance) to his right eye. Which of the following is the most critical and immediate step in management?

Perform a detailed slit-lamp examination to grade the injury
Commence copious irrigation of the ocular surface (Correct answer)
Measure the intraocular pressure
Instill a cycloplegic agent to reduce pain

Correct answer: Commence copious irrigation of the ocular surface

For any ocular chemical injury, especially an alkali burn which causes liquefactive necrosis and penetrates tissue rapidly, the single most important and immediate action is copious irrigation. [4, 8, 14, 20, 22] This must be done prior to other examinations to dilute and wash away the offending chemical, thereby minimizing the extent of the damage. All other assessments and treatments are secondary to immediate and prolonged irrigation.

Question 157: What is the first-line treatment for a small, localized sebaceous cell carcinoma of the eyelid with clear margins?

Observation with serial photography
Radiation alone
Mohs micrographic surgery or wide local excision with frozen section control (Correct answer)
Topical chemotherapy

Correct answer: Mohs micrographic surgery or wide local excision with frozen section control

Sebaceous cell carcinoma requires complete excision with margin control (Mohs or frozen sections) due to its pagetoid spread and high recurrence risk.

Question 158: Which imaging modality is considered the gold standard for detecting choroidal neovascularization in age-related macular degeneration?

Fluorescein angiography (Correct answer)
Optical coherence tomography
Fundus autofluorescence
B-scan ultrasonography

Correct answer: Fluorescein angiography

Fluorescein angiography remains the gold standard for identifying and classifying choroidal neovascular membranes by demonstrating dye leakage patterns.

Question 159: Dacryocystorhinostomy (DCR) is performed to treat which condition?

Punctal stenosis
Nasolacrimal duct obstruction (Correct answer)
Lacrimal gland prolapse
Canalicular laceration

Correct answer: Nasolacrimal duct obstruction

DCR creates a new drainage passage between the lacrimal sac and the nasal cavity to bypass a blocked nasolacrimal duct.

Question 160: What is the critical angle for total internal reflection at a crown glass-air interface if the refractive index of crown glass is 1.52?

48.8 degrees
56.4 degrees
33.3 degrees
41.1 degrees (Correct answer)

Correct answer: 41.1 degrees

The critical angle is calculated as arcsin(1/1.52), which equals approximately 41.1 degrees.

Question 161: What is the critical period for amblyopia treatment in most children?

Birth to 7-8 years (Correct answer)
Birth to 12 years
Birth to 18 years
Birth to 2 years

Correct answer: Birth to 7-8 years

The visual system remains plastic and responsive to amblyopia treatment until approximately age 7-8 years, though some benefit may extend beyond this.

Question 162: In evaluating a patient for enophthalmos after orbital trauma, which imaging study best quantifies orbital volume change?

MRI of the orbits
Ultrasound B-scan
CT scan with 3D reconstruction (Correct answer)
Plain X-ray Waters view

Correct answer: CT scan with 3D reconstruction

CT with 3D reconstruction allows precise measurement of orbital volume loss and bony defect size, guiding surgical planning for enophthalmos repair.

Question 163: A patient who underwent uneventful cataract surgery 3 weeks ago presents with decreased vision and a hypopyon. What is the most likely diagnosis?

Iris prolapse
Retained lens fragment
Acute postoperative endophthalmitis (Correct answer)
Toxic anterior segment syndrome

Correct answer: Acute postoperative endophthalmitis

Acute postoperative endophthalmitis typically presents within 1-6 weeks after surgery with pain, decreased vision, and hypopyon.

Question 164: Which type of intraocular lens (IOL) is most appropriate for a patient with significant corneal astigmatism undergoing cataract surgery?

Accommodating IOL
Toric IOL (Correct answer)
Multifocal IOL
Monofocal IOL

Correct answer: Toric IOL

Toric IOLs are specifically designed to correct pre-existing corneal astigmatism at the time of cataract surgery.

Question 165: A 55-year-old patient presents with acute angle-closure crisis. After initial medical management with topical and systemic agents, what is the definitive treatment?

Goniotomy
Long-term oral acetazolamide
Trabeculectomy
Laser peripheral iridotomy (Correct answer)

Correct answer: Laser peripheral iridotomy

Laser peripheral iridotomy is the definitive treatment for acute angle-closure by eliminating pupillary block.

Question 166: Which pupillary finding is characteristic of a dorsal midbrain (Parinaud) syndrome?

Light-near dissociation with large pupils (Correct answer)
Marcus Gunn pupil
Horner syndrome
Argyll Robertson pupils

Correct answer: Light-near dissociation with large pupils

Dorsal midbrain syndrome classically presents with light-near dissociation where pupils react poorly to light but constrict with convergence, along with large, irregular pupils.

Question 167: Which aberration causes a point source of light to appear as a comet-shaped blur when imaged through the peripheral portion of a spherical lens?

Spherical aberration
Coma (Correct answer)
Chromatic aberration
Distortion

Correct answer: Coma

Coma produces an asymmetric, comet-shaped blur pattern for off-axis point sources passing through different lens zones.

Question 168: A patient with a history of retinal detachment repair presents with decreased vision and an epiretinal membrane causing significant macular distortion. Which surgical intervention is most appropriate?

Pars plana vitrectomy with membrane peeling (Correct answer)
Scleral buckle revision
Pneumatic retinopexy
Intravitreal corticosteroid injection

Correct answer: Pars plana vitrectomy with membrane peeling

Pars plana vitrectomy with membrane peeling is the standard surgical treatment for visually significant epiretinal membranes causing macular distortion.

Question 169: During biometry for IOL power calculation, which formula is generally considered most accurate for eyes with an axial length shorter than 22 mm?

Holladay 1
Haigis
Hoffer Q (Correct answer)
SRK/T

Correct answer: Hoffer Q

The Hoffer Q formula has been shown to be more accurate for short eyes with axial lengths under 22 mm compared to other third-generation formulas.

Question 170: What is the critical angle for total internal reflection at a crown glass-air interface if the refractive index of crown glass is 1.52?

41.1 degrees (Correct answer)
55.6 degrees
48.8 degrees
33.3 degrees

Correct answer: 41.1 degrees

The critical angle is calculated as sin^-1(1/1.52) = 41.1 degrees.

Question 171: A patient undergoes successful surgery for a rhegmatogenous retinal detachment but develops recurrent detachment 6 weeks later. The examination reveals fixed retinal folds and subretinal strands, characteristic of proliferative vitreoretinopathy (PVR). Which cell type is considered the primary driver of membrane formation in PVR?

Vascular endothelial cells
Retinal pigment epithelial (RPE) cells (Correct answer)
Müller cells
Pericytes

Correct answer: Retinal pigment epithelial (RPE) cells

The pathogenesis of proliferative vitreoretinopathy (PVR) involves the dispersion of retinal pigment epithelial (RPE) cells into the vitreous cavity through the retinal break. These RPE cells undergo an epithelial-to-mesenchymal transition (EMT), transforming into fibroblast-like cells that proliferate and form contractile membranes on the retinal surfaces, leading to retinal traction and redetachment.

Question 172: A patient with a keratometry reading of 44.00 D in one meridian and 46.00 D in the perpendicular meridian has what type and amount of corneal astigmatism?

4.00 D irregular astigmatism
2.00 D with-the-rule astigmatism (Correct answer)
2.00 D against-the-rule astigmatism
2.00 D oblique astigmatism

Correct answer: 2.00 D with-the-rule astigmatism

The 2.00 D difference between meridians with the steeper curvature at 90 degrees indicates with-the-rule astigmatism.

Question 173: A 55-year-old presents with acute angle-closure glaucoma. After initial medical management lowers the IOP, what definitive treatment should be performed?

Goniotomy
Trabeculectomy
Laser peripheral iridotomy (Correct answer)
Selective laser trabeculoplasty

Correct answer: Laser peripheral iridotomy

Laser peripheral iridotomy is the definitive treatment for acute angle-closure glaucoma to prevent recurrence.

Question 174: Which layer of the cornea is most affected in Fuchs endothelial corneal dystrophy?

Descemet membrane and endothelium (Correct answer)
Stroma
Bowman layer
Epithelial basement membrane

Correct answer: Descemet membrane and endothelium

Fuchs dystrophy is characterized by progressive loss of endothelial cells and thickening of Descemet membrane with guttae formation.

Question 175: A 30-year-old man presents with a fixed, dilated left pupil, ptosis, and the eye is deviated inferiorly and laterally. CT angiography reveals a posterior communicating artery aneurysm. Which finding distinguishes a compressive third nerve palsy from a microvascular one?

Pupil involvement (Correct answer)
Pain at onset
Presence of ptosis
Limitation of adduction

Correct answer: Pupil involvement

Pupil involvement (mydriasis) is the key distinguishing feature of compressive third nerve palsy because the parasympathetic pupillary fibers run superficially on the nerve and are compressed first by an aneurysm.

Question 176: Which symptom is associated with vitreous hemorrhage?

Painful eye
Eye redness
Itching
Sudden appearance of floaters (Correct answer)

Correct answer: Sudden appearance of floaters

Sudden vision loss with floaters is a key sign of vitreous hemorrhage, often related to diabetic eye disease or trauma.

Question 177: A 62-year-old patient presents with sudden painless vision loss and a cherry-red spot on fundoscopy. What is the most likely diagnosis?

Central retinal artery occlusion (Correct answer)
Vitreous hemorrhage
Central retinal vein occlusion
Retinal detachment

Correct answer: Central retinal artery occlusion

A cherry-red spot with surrounding retinal whitening is the classic fundoscopic finding in central retinal artery occlusion due to ischemia of the inner retina.

Question 178: Which nerve is at greatest risk of injury during lower eyelid blepharoplasty?

Infraorbital nerve (Correct answer)
Supratrochlear nerve
Facial nerve (marginal mandibular branch)
Lacrimal nerve

Correct answer: Infraorbital nerve

The infraorbital nerve exits the infraorbital foramen just inferior to the orbital rim and is at risk of injury during lower eyelid or midface procedures.

Question 179: Which corneal dystrophy is associated with mutations in the TGFBI gene on chromosome 5q31 and presents with granular opacities in the anterior stroma?

Granular corneal dystrophy type I (classic) (Correct answer)
Posterior polymorphous corneal dystrophy
Macular corneal dystrophy
Congenital hereditary endothelial dystrophy

Correct answer: Granular corneal dystrophy type I (classic)

Granular dystrophy type I is caused by TGFBI mutations and features discrete, crumb-like hyaline deposits in the anterior central stroma with clear intervening spaces.

Question 180: A patient with primary open-angle glaucoma on maximum tolerated medical therapy continues to show visual field progression. What is the most appropriate next step in management?

Observation with repeat visual fields in 6 months
Laser trabeculoplasty (Correct answer)
Add another prostaglandin analog
Trabeculectomy

Correct answer: Laser trabeculoplasty

Selective laser trabeculoplasty (SLT) is an appropriate escalation step before incisional surgery in patients failing medical therapy.

Question 181: Jackson cross-cylinder testing refines which component of a patient's refractive correction?

Astigmatic axis and power (Correct answer)
Pupil size compensation
Spherical equivalent
Prismatic correction

Correct answer: Astigmatic axis and power

The Jackson cross-cylinder is specifically designed to refine both the axis and power of the cylindrical (astigmatic) correction during subjective refraction.

Question 182: A neonate presents with bilateral upper eyelid ptosis, inability to elevate either eye, and chin-up head posture. What is the most likely diagnosis?

Bilateral third nerve palsy
Double elevator palsy with Marcus Gunn jaw-winking
Myasthenia gravis
Congenital fibrosis of the extraocular muscles (Correct answer)

Correct answer: Congenital fibrosis of the extraocular muscles

Congenital fibrosis of the extraocular muscles (CFEOM) presents with restrictive ophthalmoplegia, ptosis, and characteristic infraducted eye positions from birth.

Question 183: What is the recommended first-line treatment for macular edema secondary to central retinal vein occlusion?

Intravitreal dexamethasone implant
Intravitreal anti-VEGF injection (Correct answer)
Observation for 3 months
Grid laser photocoagulation

Correct answer: Intravitreal anti-VEGF injection

Intravitreal anti-VEGF agents are the current first-line treatment for macular edema secondary to central retinal vein occlusion based on CRUISE and similar landmark trials.

Question 184: Which finding on confocal microscopy is pathognomonic for Acanthamoeba keratitis?

Intracellular gram-negative diplococci
Filamentary structures in the stroma
Hyper-reflective round double-walled cysts (Correct answer)
Branching dendritic lesions

Correct answer: Hyper-reflective round double-walled cysts

Confocal microscopy reveals characteristic hyper-reflective, double-walled round cysts of Acanthamoeba in the corneal stroma, allowing rapid noninvasive diagnosis.

Question 185: A patient with primary open-angle glaucoma on maximum tolerated medical therapy continues to show progressive visual field loss. What is the most appropriate next step in management?

Trabeculectomy (Correct answer)
Repeat visual field testing in 6 months
Laser peripheral iridotomy
Add a fourth topical medication

Correct answer: Trabeculectomy

Trabeculectomy is indicated when medical therapy fails to control progressive glaucomatous damage.

Question 186: What is the primary diagnostic tool for evaluating macular degeneration?

Ultrasound
Tonometry
OCT (Optical Coherence Tomography) (Correct answer)
Amsler grid

Correct answer: OCT (Optical Coherence Tomography)

Vitreous hemorrhage occurs when blood leaks into the vitreous gel, the clear, jelly-like substance filling the eye. The most common symptom is a sudden appearance of new floaters, which can vary from fine specks to dense clouds, or a sudden decrease in vision, depending on the amount of blood. This requires prompt medical evaluation.

Question 187: What is the classic appearance of keratic precipitates (KPs) in granulomatous uveitis?

Pigmented KPs along the pupillary margin
Small punctate KPs in the superior cornea
Fine, stellate KPs scattered across the entire cornea
Large, greasy 'mutton-fat' KPs in the inferior cornea (Correct answer)

Correct answer: Large, greasy 'mutton-fat' KPs in the inferior cornea

Granulomatous uveitis is characterized by large, greasy 'mutton-fat' KPs that accumulate in the inferior cornea due to aqueous convection currents.

Question 188: A 4-month-old infant presents with nystagmus and profoundly poor vision. Parents report the infant frequently pokes and presses on their eyes with their fists. This behavior, known as the oculodigital sign, is a pathognomonic feature of which of the following conditions?

Achromatopsia
Leber congenital amaurosis (LCA) (Correct answer)
Congenital stationary night blindness
Infantile nystagmus syndrome

Correct answer: Leber congenital amaurosis (LCA)

The Franceschetti oculodigital sign, which involves eye poking, pressing, and rubbing, is a characteristic and pathognomonic finding in infants with Leber congenital amaurosis (LCA). This behavior is thought to create phosphenes (mechanical stimulation of the retina causing a sensation of light), which may be the only visual stimulation these severely visually impaired infants can experience. While nystagmus is present in the other conditions, the oculodigital sign is most strongly associated with LCA.

Question 189: In a patient with wet age-related macular degeneration, which OCT finding most strongly indicates active choroidal neovascularization requiring treatment?

Subretinal and intraretinal fluid with pigment epithelial detachment (Correct answer)
Geographic atrophy of the RPE
Drusen without subretinal fluid
Vitreomacular traction without fluid

Correct answer: Subretinal and intraretinal fluid with pigment epithelial detachment

The presence of subretinal fluid, intraretinal fluid, or pigment epithelial detachment on OCT indicates active exudation from choroidal neovascularization requiring anti-VEGF therapy.

Question 190: A 4-month-old infant presents with a constant, large-angle esotropia of 50 prism diopters that has been present since birth. Cycloplegic refraction reveals +2.00 D sphere in both eyes. The fundus exam is normal. What is the most appropriate next step in management?

Proceed with bilateral medial rectus muscle recessions. (Correct answer)
Observe the patient for spontaneous resolution until 6 months of age.
Begin alternate-day patching of the dominant eye to treat presumed amblyopia.
Prescribe full cycloplegic correction and re-evaluate in 6-8 weeks.

Correct answer: Proceed with bilateral medial rectus muscle recessions.

For infantile esotropia, which is a constant, large-angle deviation presenting before 6 months of age, surgical correction is the definitive treatment. While any significant refractive error should be corrected first, a hyperopia of +2.00 D is not considered high enough to be the primary cause of such a large deviation. Observation is not appropriate for a constant, large-angle strabismus. Early surgical alignment, typically between 6 and 24 months of age, offers the best chance for developing some level of binocular vision.

Question 191: A 58-year-old patient with a history of severe rheumatoid arthritis, managed for over a decade with oral prednisone, presents with a chief complaint of disabling glare when driving at night and difficulty reading, which has worsened over the last year. Visual acuity is 20/50 in the right eye and 20/40 in the left. Slit-lamp examination is most likely to reveal which type of cataract?

Cortical spoking
Nuclear sclerotic
Posterior subcapsular (Correct answer)
Traumatic rosette

Correct answer: Posterior subcapsular

Long-term systemic corticosteroid use is a well-established and significant risk factor for the development of posterior subcapsular cataracts (PSC). The symptoms of glare and difficulty with near vision are classic for PSCs because the opacity is located at the nodal point of the eye's optical system.

Question 192: What is the main goal of glaucoma treatment?

Strengthen eye muscles
Dilate pupils
Reduce intraocular pressure (Correct answer)
Improve color vision

Correct answer: Reduce intraocular pressure

Prostaglandin analogs, such as latanoprost, are frequently the initial medication choice for open-angle glaucoma. These eye drops work by increasing the outflow of aqueous humor from the eye, effectively reducing intraocular pressure. This mechanism helps to protect the optic nerve from damage.

Question 193: A 45-year-old patient presents with sudden painless monocular vision loss and a relative afferent pupillary defect. Fundoscopy reveals a swollen optic disc with peripapillary hemorrhages. What is the most likely diagnosis?

Central retinal artery occlusion
Optic neuritis
Anterior ischemic optic neuropathy (Correct answer)
Papilledema

Correct answer: Anterior ischemic optic neuropathy

Sudden painless vision loss with disc swelling and peripapillary hemorrhages in a middle-aged patient is classic for non-arteritic anterior ischemic optic neuropathy (NAION).

Question 194: A 29-year-old obese female with a BMI of 38 presents with a six-month history of daily, pulsatile headaches, transient visual obscurations, and a 'whooshing' sound in her ears. Fundus examination reveals bilateral grade 2 papilledema. According to the modified Dandy criteria, which of the following is required to confirm a diagnosis of idiopathic intracranial hypertension (IIH)?

Lumbar puncture opening pressure > 25 cm H2O (Correct answer)
Abnormal CSF composition
Enlarged ventricles on MRI
Focal neurological signs other than a sixth nerve palsy

Correct answer: Lumbar puncture opening pressure > 25 cm H2O

The diagnosis of idiopathic intracranial hypertension (IIH) is guided by the modified Dandy criteria. These criteria require signs and symptoms of increased intracranial pressure, no other localizing neurologic signs (except for a possible 6th nerve palsy), normal neuroimaging (no mass, and typically normal to small ventricles), and normal CSF composition. A key diagnostic criterion is a lumbar puncture opening pressure greater than 25 cm H2O in an adult.

Question 195: In a patient with neovascular glaucoma secondary to proliferative diabetic retinopathy, what is the most critical initial treatment step?

Selective laser trabeculoplasty
Observation with serial IOP monitoring
Topical prostaglandin analog monotherapy
Panretinal photocoagulation and/or intravitreal anti-VEGF injection (Correct answer)

Correct answer: Panretinal photocoagulation and/or intravitreal anti-VEGF injection

Treating the underlying retinal ischemia with panretinal photocoagulation and anti-VEGF therapy is essential to halt the neovascular drive before addressing IOP surgically.

Question 196: A 55-year-old patient develops Horner syndrome after a painful episode. Pharmacologic testing with hydroxyamphetamine drops fails to dilate the affected pupil. Where is the lesion localized?

Ciliary ganglion
First-order (central) neuron
Third-order (postganglionic) neuron (Correct answer)
Second-order (preganglionic) neuron

Correct answer: Third-order (postganglionic) neuron

Hydroxyamphetamine works by releasing norepinephrine from intact postganglionic nerve terminals; failure to dilate indicates a third-order (postganglionic) neuron lesion.

Question 197: What is the mechanism of action of netarsudil, a newer glaucoma medication?

Carbonic anhydrase inhibition in the ciliary body
Cholinergic stimulation causing ciliary muscle contraction
Selective alpha-2 agonism reducing aqueous production
Rho kinase inhibition leading to decreased trabecular meshwork resistance and reduced episcleral venous pressure (Correct answer)

Correct answer: Rho kinase inhibition leading to decreased trabecular meshwork resistance and reduced episcleral venous pressure

Netarsudil is a rho kinase inhibitor that lowers IOP by decreasing trabecular meshwork outflow resistance and reducing episcleral venous pressure.

Question 198: Which HLA type is most strongly associated with birdshot chorioretinopathy?

HLA-B51
HLA-DR15
HLA-A29 (Correct answer)
HLA-B27

Correct answer: HLA-A29

Birdshot chorioretinopathy has an almost pathognomonic association with HLA-A29, found in over 95% of affected patients—one of the strongest HLA-disease associations in medicine.

Question 199: Which imaging modality is most sensitive for detecting subclinical choroidal involvement in Vogt-Koyanagi-Harada syndrome?

Indocyanine green angiography (ICGA) (Correct answer)
Fundus fluorescein angiography (FFA)
B-scan ultrasonography
Spectral-domain OCT

Correct answer: Indocyanine green angiography (ICGA)

ICGA is superior for imaging the choroidal stroma and detects subclinical choroidal granulomas in VKH as hypofluorescent dark spots, even before they are visible on FFA or clinical examination.

Question 200: What is the characteristic OCT finding in central serous chorioretinopathy?

Epiretinal membrane with retinal surface wrinkling
Neurosensory retinal detachment with subretinal fluid (Correct answer)
Intraretinal cystic spaces in the outer nuclear layer
Vitreomacular traction with foveal distortion

Correct answer: Neurosensory retinal detachment with subretinal fluid

Central serous chorioretinopathy classically shows a dome-shaped neurosensory retinal detachment with optically clear subretinal fluid on OCT.

Board Certified Ophthalmologist Exam

The Board Certified Ophthalmologist Exam exam validates essential knowledge and skills required for certification or licensure in this field.

200

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240 min

Time Limit

70%

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