NBEO Part II Patient Assessment & Management (PAM) / TMOD Examination — Questions and Answers

Question 1: A patient's corneal topography map shows steepening of the vertical meridian in a "bow-tie" pattern. This indicates that the patient has:

a spherical cornea
against-the-rule astigmatism
irregular astigmatism
with-the-rule astigmatism (Correct answer)

Correct answer: with-the-rule astigmatism

Explanation: A "bow tie" pattern on a corneal topography map indicates with-the-rule astigmatism, where the steepest meridian is vertical (aligned with the rule of the topography map).

Question 2: Which finding differentiates a full-thickness macular hole from a lamellar macular hole on OCT?

Lamellar hole shows a through-and-through defect
Full-thickness hole shows complete absence of retinal tissue through all layers (Correct answer)
Lamellar hole always has associated subretinal fluid
Full-thickness hole has an epiretinal membrane present

Correct answer: Full-thickness hole shows complete absence of retinal tissue through all layers

A full-thickness macular hole shows complete interruption of all retinal layers on OCT, while a lamellar hole involves only partial thickness with intact outer retinal layers.

Question 3: What is the treatment for bacterial conjunctivitis?

Steroid injections
Surgical intervention
Oral antihistamines
Topical broad-spectrum antibiotic eye drops or ointment such as fluoroquinolones or erythromycin (Correct answer)

Correct answer: Topical broad-spectrum antibiotic eye drops or ointment such as fluoroquinolones or erythromycin

Bacterial conjunctivitis is treated with topical antibiotics (fluoroquinolones, aminoglycosides, or erythromycin ointment). Broad-spectrum coverage is typically used empirically, with culture-guided therapy for severe or resistant cases.

Question 4: What is glaucoma and how is it detected?

A corneal scratch
A group of diseases that damage the optic nerve, often associated with elevated IOP, detected through tonometry, optic nerve evaluation, and visual field testing (Correct answer)
A clouding of the lens
An infection of the eyelid

Correct answer: A group of diseases that damage the optic nerve, often associated with elevated IOP, detected through tonometry, optic nerve evaluation, and visual field testing

Glaucoma causes progressive, irreversible optic nerve damage and visual field loss. Detection requires IOP measurement, optic disc evaluation (cupping), OCT nerve fiber analysis, and perimetry (visual field testing).

Question 5: A +7.00 D lens has a real object located 20 cm from the lens. The conjugate image is:

virtual and located 8.30 cm from the lens
real and located 50 cm from the lens (Correct answer)
real and located 8.30 cm from the lens
virtual and located 50 cm from the lens
real and located 14.30 cm from the lens

Correct answer: real and located 50 cm from the lens

Explanation: With a +7.00 D lens and a real object 20 cm from the lens, the image is real and located 50 cm from the lens. This is because the lens equation yields this result.

Question 6: What is astigmatism?

A disease of the retina
An age-related condition
Only a problem for near vision
A refractive error caused by an irregularly curved cornea or lens that creates two focal points, causing blurred or distorted vision at all distances (Correct answer)

Correct answer: A refractive error caused by an irregularly curved cornea or lens that creates two focal points, causing blurred or distorted vision at all distances

In astigmatism, the cornea or lens has different curvatures in different meridians (like a football vs. a basketball), creating two focal lines instead of one focal point, corrected with cylindrical lenses.

Question 7: A 45-year-old male contact lens wearer complains of severe unilateral eye pain, photophobia, and watery discharge that began this morning. Slit lamp examination with fluorescein dye reveals a branching, linear epithelial defect with distinct terminal bulbs. Which of the following is the most likely diagnosis?

Pseudomonal ulcer
Acanthamoeba keratitis
Fungal keratitis
Herpes Simplex Virus (HSV) dendritic keratitis (Correct answer)

Correct answer: Herpes Simplex Virus (HSV) dendritic keratitis

A dendritic (branching) ulcer with terminal bulbs is pathognomonic for Herpes Simplex Virus (HSV) epithelial keratitis. This classic presentation helps differentiate it from other forms of infectious keratitis.

Question 8: Which test is considered the gold standard for diagnosing choroidal neovascularization (CNV) in wet AMD?

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

Correct answer: Fluorescein angiography

Fluorescein angiography remains the gold standard for detecting and classifying CNV, showing leakage patterns that distinguish classic from occult membranes.

Question 9: Contact lens-induced acute red eye (CLARE) is most commonly associated with colonization by which category of organism?

Gram-negative bacteria (Correct answer)
Gram-positive cocci
Acanthamoeba species
Fungi

Correct answer: Gram-negative bacteria

CLARE is most commonly associated with Gram-negative bacterial colonization of extended wear contact lenses, with endotoxins triggering the inflammatory response.

Question 10: A 9-year-old complains of headaches, intermittent blurred vision, and losing her place while reading. Clinical testing reveals a receded near point of convergence (NPC) to 15 cm break / 20 cm recovery, reduced positive fusional vergence (PFV) at near, and an exophoria of 10 prism diopters at near. What is the MOST appropriate initial management?

Full-time occlusion of the non-dominant eye
Office-based vision therapy (Correct answer)
Surgical consultation for lateral rectus recession
Prescription of base-in prism for near work

Correct answer: Office-based vision therapy

The patient's symptoms (asthenopia, blurred vision, difficulty with reading) and clinical signs (receded NPC, reduced PFV, near exophoria) are classic for convergence insufficiency (CI). [5, 6, 8, 10] Office-based vision therapy is the most effective and evidence-based treatment for improving convergence ability and alleviating symptoms in children with CI. [5, 8]

Question 11: Based on the Holden–Mertz criteria, what minimum Dk/t (×10⁻⁹) is required for a daily wear soft contact lens to prevent clinically significant corneal edema?

87
24 (Correct answer)
35
12

Correct answer: 24

Holden and Mertz established that a minimum Dk/t of 24 ×10⁻⁹ is required for daily wear to prevent clinically significant corneal swelling, while extended wear requires 87 ×10⁻⁹.

Question 12: A 53-year-old male complains of occasional blur at a distance and near. His visual acuities are 20/30 in each eye at distance and near with his present lens correction of +1.00 DS OU, Add +1.75 D. Your distance refraction for 20/20+ acuity is +1.50 DS OU. The BEST tentative Add for the new prescription will have the power of:

+2.50 D
+1.25 D
+2.25 D
+1.75 D (Correct answer)

Correct answer: +1.75 D

Explanation: To find the added power, subtract the distance refraction (+1.50 DS OU) from the near refraction (+1.00 DS OU + Add). This gives us +1.75 D. Therefore, the best tentative add for the new prescription is +1.75 D.

Question 13: A head tilt toward the left shoulder is MOST likely due to a paresis of the right:

inferior rectus
superior rectus
inferior oblique
superior oblique (Correct answer)

Correct answer: superior oblique

Explanation: A head tilt toward the left shoulder is most likely due to a paresis of the right superior oblique muscle. This muscle normally acts to depress the eye when it is adducted (turned inward), so weakness or paresis of this muscle can result in an inability to properly depress the eye when looking inward, leading to a compensatory head tilt.

Question 14: What are contact lens fitting considerations?

Base curve selection, diameter, material (oxygen permeability), wearing schedule, and patient compliance with care and replacement schedules (Correct answer)
Only the lens color matters
Only the prescription power matters
Contact lenses are one-size-fits-all

Correct answer: Base curve selection, diameter, material (oxygen permeability), wearing schedule, and patient compliance with care and replacement schedules

Proper contact lens fitting requires measuring corneal curvature, selecting appropriate base curve and diameter, choosing material based on oxygen needs and wearing time, and educating patients on proper care to prevent complications.

Question 15: What is a cataract and how is it treated?

A retinal detachment requiring laser treatment
A refractive error corrected with glasses
A clouding of the crystalline lens causing decreased vision, treated surgically by removing the clouded lens and replacing it with an intraocular lens (IOL) (Correct answer)
An infection of the cornea treated with antibiotics

Correct answer: A clouding of the crystalline lens causing decreased vision, treated surgically by removing the clouded lens and replacing it with an intraocular lens (IOL)

Cataracts develop as lens proteins denature and aggregate, causing opacity. When vision impairment affects daily activities, phacoemulsification surgery removes the clouded lens and implants a clear artificial IOL.

Question 16: What are the three layers of the eye?

Fibrous (sclera/cornea), vascular (uvea: iris/ciliary body/choroid), and neural (retina) (Correct answer)
Iris, pupil, and sclera
Cornea, lens, and retina
Anterior chamber, vitreous, and retina

Correct answer: Fibrous (sclera/cornea), vascular (uvea: iris/ciliary body/choroid), and neural (retina)

The eye has three concentric layers: the outer fibrous tunic (sclera and cornea), the middle vascular tunic (uvea: iris, ciliary body, choroid), and the inner neural tunic (retina).

Question 17: What is the difference between CR-39 and polycarbonate lens materials?

They are identical materials
Polycarbonate has better optics
CR-39 has better optical clarity; polycarbonate is lighter, thinner, and significantly more impact-resistant (Correct answer)
CR-39 is always preferred

Correct answer: CR-39 has better optical clarity; polycarbonate is lighter, thinner, and significantly more impact-resistant

CR-39 plastic offers excellent optical quality and scratch resistance. Polycarbonate is 10x more impact-resistant, lighter, and thinner, making it mandatory for children's glasses, safety eyewear, and sports eyewear.

Question 18: In a patient with a trochlear nerve (CN IV) palsy, which head position reliably worsens vertical diplopia?

Ipsilateral head tilt (Correct answer)
Upgaze
Contralateral head tilt
Head tilt toward the shoulder of the affected eye

Correct answer: Ipsilateral head tilt

The Bielschowsky head tilt test: tilting toward the side of the palsy worsens hypertropia because the affected superior oblique cannot intort, forcing the eye upward.

Question 19: What is the treatment for herpes simplex keratitis?

Surgical removal of the cornea
Topical antibiotics only
No treatment is needed
Topical antiviral medication (trifluridine or ganciclovir gel) and possibly oral antiviral therapy; corticosteroids require careful management (Correct answer)

Correct answer: Topical antiviral medication (trifluridine or ganciclovir gel) and possibly oral antiviral therapy; corticosteroids require careful management

HSV keratitis requires antiviral therapy. Topical antivirals treat epithelial disease. Stromal disease may require steroids (carefully, with antiviral cover) to reduce inflammation and prevent scarring.

Question 20: The AREDS2 formula for dry AMD supplementation includes which two carotenoids?

Lutein and zeaxanthin (Correct answer)
Astaxanthin and canthaxanthin
Beta-carotene and lycopene
Lutein and astaxanthin

Correct answer: Lutein and zeaxanthin

AREDS2 replaced beta-carotene with lutein (10 mg) and zeaxanthin (2 mg) due to beta-carotene's lung cancer risk in smokers.

Question 21: What is a slit lamp examination?

A test of eye movement
A measurement of visual acuity
An examination using a penlight only
A biomicroscopic examination using a high-intensity light source and magnification to examine the anterior and posterior segments of the eye in detail (Correct answer)

Correct answer: A biomicroscopic examination using a high-intensity light source and magnification to examine the anterior and posterior segments of the eye in detail

The slit lamp biomicroscope projects a thin beam of light at various angles and widths while providing magnified stereoscopic views, allowing detailed examination of the lids, conjunctiva, cornea, iris, lens, and with accessories, the retina.

Question 22: Which exposure is considered the primary risk factor for Acanthamoeba keratitis in contact lens wearers?

Hydrogen peroxide system non-compliance
Sleeping in daily wear silicone hydrogel lenses
Exposure to tap water or swimming while wearing lenses (Correct answer)
Use of multipurpose solutions without rubbing

Correct answer: Exposure to tap water or swimming while wearing lenses

Water exposure (tap water, swimming, showering with lenses) introduces Acanthamoeba to the lens environment and is the primary modifiable risk factor for Acanthamoeba keratitis.

Question 23: What is the function of the crystalline lens in the eye?

To change shape (accommodate) to focus light from objects at varying distances onto the retina (Correct answer)
To produce aqueous humor
To detect color
To protect the eye from UV light

Correct answer: To change shape (accommodate) to focus light from objects at varying distances onto the retina

The crystalline lens changes shape through ciliary muscle contraction, increasing its curvature for near focus and flattening for distance focus, a process called accommodation.

Question 24: Which hereditary optic neuropathy causes bilateral, painless, central vision loss in young males and is associated with mitochondrial DNA mutations?

Wolfram syndrome
Dominant optic atrophy (Kjer disease)
Friedrich ataxia optic neuropathy
Leber hereditary optic neuropathy (LHON) (Correct answer)

Correct answer: Leber hereditary optic neuropathy (LHON)

LHON is caused by mitochondrial DNA point mutations and causes sequential bilateral central vision loss in young men due to retinal ganglion cell death.

Question 25: What are rods and cones?

Types of surgical instruments
Parts of the lens
Photoreceptor cells in the retina: rods detect dim light (scotopic vision) and cones detect color and detail (photopic vision) (Correct answer)
Blood vessel types in the retina

Correct answer: Photoreceptor cells in the retina: rods detect dim light (scotopic vision) and cones detect color and detail (photopic vision)

Rods (120 million, peripheral retina) provide night vision and motion detection. Cones (6 million, concentrated in the macula) provide color vision and fine detail in bright light.

Question 26: Drusen beneath the retinal pigment epithelium are a hallmark of which condition?

Central serous chorioretinopathy
Macular hole
Diabetic macular edema
Dry (non-exudative) age-related macular degeneration (Correct answer)

Correct answer: Dry (non-exudative) age-related macular degeneration

Drusen are extracellular deposits between Bruch's membrane and the RPE and are the defining early feature of dry AMD.

Question 27: According to the FDA classification system, a soft contact lens with water content at or above what percentage is classified as 'high water content'?

70%
50% (Correct answer)
45%
30%

Correct answer: 50%

The FDA classifies soft contact lens materials into Groups I–IV; lenses with water content ≥50% are classified as high water content.

Question 28: Which pupillary finding is associated with Horner syndrome?

Light-near dissociation
Relative afferent pupillary defect
Miosis, ptosis, and anhidrosis (Correct answer)
Mydriasis with poor light reaction

Correct answer: Miosis, ptosis, and anhidrosis

Horner syndrome results from disruption of the sympathetic pathway and presents with miosis, ptosis (from superior and inferior tarsal muscles), and anhidrosis.

Question 29: What is the role of punctal plugs in dry eye treatment?

Small devices inserted into the tear drainage openings to retain tears on the eye surface longer (Correct answer)
Devices used during surgery
Contact lens accessories
Plugs inserted into the ear canal

Correct answer: Small devices inserted into the tear drainage openings to retain tears on the eye surface longer

Punctal plugs (silicone or collagen) block the tear drainage puncta, keeping natural and artificial tears on the ocular surface longer, increasing tear volume and reducing dry eye symptoms.

Question 30: In a patient with keratoconus, rigid gas permeable contact lenses improve visual acuity primarily because they:

Apply gentle pressure to flatten the apex of the cone permanently
Provide mechanical support that prevents cone progression
Deliver higher oxygen than soft lenses, allowing the cone epithelium to heal
Create a smooth anterior refracting surface independent of the irregular cornea using a tear lens (Correct answer)

Correct answer: Create a smooth anterior refracting surface independent of the irregular cornea using a tear lens

RGP lenses mask irregular corneal astigmatism in keratoconus by creating a new smooth refracting surface; the tear lens between the flat posterior RGP surface and the irregular cornea fills in the irregularity.

Question 31: A 4-year-old boy presents with a constant, large-angle esotropia that his parents report has been present since he was 4 months old. He cross-fixates, and visual acuity is equal in both eyes. Cycloplegic refraction reveals +1.50 D sphere in both eyes. Which of the following is the MOST likely diagnosis?

Sensory esotropia
Intermittent exotropia
Infantile esotropia (Correct answer)
Accommodative esotropia

Correct answer: Infantile esotropia

Infantile esotropia is characterized by a large-angle, constant esotropia with an onset before 6 months of age. Cross-fixation is a common feature, which often helps maintain equal visual acuity in both eyes. The refractive error is typically a low to moderate hyperopia, which is not the primary cause of the deviation, unlike accommodative esotropia. [4, 9, 11]

Question 32: What is refraction in an eye examination?

The process of determining the correct lens prescription to correct refractive errors like myopia, hyperopia, and astigmatism (Correct answer)
Examining the retina
Measuring intraocular pressure
Testing color vision

Correct answer: The process of determining the correct lens prescription to correct refractive errors like myopia, hyperopia, and astigmatism

Refraction uses objective (retinoscopy, autorefraction) and subjective (phoropter) techniques to determine the precise lens power needed to focus light correctly on the retina, correcting blurry vision.

Question 33: What is the vitreous humor?

A clear gel filling the posterior cavity of the eye that maintains the eye's shape and holds the retina in place (Correct answer)
The liquid inside the lens
The fluid in the anterior chamber
A type of tear film

Correct answer: A clear gel filling the posterior cavity of the eye that maintains the eye's shape and holds the retina in place

The vitreous is a transparent gel (99% water with collagen and hyaluronic acid) that maintains the globe's shape, transmits light to the retina, and provides metabolic support. With age, it liquefies and can cause floaters.

Question 34: Back vertex power of a contact lens is best defined as:

The base curve converted to dioptric power
The vergence of light leaving the posterior surface of the lens (Correct answer)
The prismatic effect at the optical center
The power measured at the anterior surface of the lens

Correct answer: The vergence of light leaving the posterior surface of the lens

Back vertex power is the vergence of light leaving the posterior surface of the contact lens, which is the standard clinical method for specifying and measuring contact lens power.

Question 35: What is the most common cause of sudden, painless monocular vision loss in an elderly patient with a cherry-red spot?

Central retinal vein occlusion
Vitreous hemorrhage
Ischemic optic neuropathy
Central retinal artery occlusion (Correct answer)

Correct answer: Central retinal artery occlusion

Central retinal artery occlusion produces sudden painless vision loss with retinal whitening from ischemic edema and a cherry-red spot at the fovea where the choroid shows through.

Question 36: What is the cornea and what are its functions?

The transparent front surface of the eye that provides about two-thirds of the eye's refractive power and protects internal structures (Correct answer)
The light-sensitive layer at the back of the eye
The colored part of the eye
The gel filling the center of the eye

Correct answer: The transparent front surface of the eye that provides about two-thirds of the eye's refractive power and protects internal structures

The cornea is the eye's primary refractive surface, bending light as it enters the eye. Its transparency is maintained by precise arrangement of collagen fibers and controlled hydration through the endothelial pump mechanism.

Question 37: Which finding on fundus examination is MOST characteristic of nonproliferative diabetic retinopathy (NPDR)?

Vitreous hemorrhage
Neovascularization of the disc
Fibrovascular proliferation
Microaneurysms (Correct answer)

Correct answer: Microaneurysms

Microaneurysms are the earliest and most characteristic sign of NPDR, representing focal outpouchings of retinal capillary walls.

Question 38: What is diabetic retinopathy?

A type of glaucoma
Damage to retinal blood vessels caused by diabetes, progressing from microaneurysms to proliferative neovascularization that can cause blindness (Correct answer)
An eyelid infection
A refractive error

Correct answer: Damage to retinal blood vessels caused by diabetes, progressing from microaneurysms to proliferative neovascularization that can cause blindness

Diabetic retinopathy damages retinal capillaries, causing microaneurysms, hemorrhages, exudates, and in advanced stages, neovascularization that can lead to vitreous hemorrhage and tractional retinal detachment.

Question 39: What is fluorescein staining used for in optometry?

To test pupil reactions
To detect corneal epithelial defects, evaluate tear film stability (TBUT), and assess contact lens fitting (Correct answer)
To change eye color temporarily
To measure intraocular pressure only

Correct answer: To detect corneal epithelial defects, evaluate tear film stability (TBUT), and assess contact lens fitting

Fluorescein sodium dye (viewed with cobalt blue light) highlights corneal abrasions, ulcers, and epithelial irregularities, and is used for tear break-up time measurement and evaluating contact lens-cornea interaction.

Question 40: What is myopia and how is it corrected?

Loss of near focus due to aging
Farsightedness corrected with plus lenses
Distorted vision due to irregular cornea
Nearsightedness where distant objects are blurry because light focuses in front of the retina, corrected with minus (concave) lenses (Correct answer)

Correct answer: Nearsightedness where distant objects are blurry because light focuses in front of the retina, corrected with minus (concave) lenses

In myopia, the eye is too long or the cornea too steep, causing light to focus before the retina. Minus lenses diverge light rays so they focus correctly on the retina.

Question 41: Which of the following is LEAST likely to contribute to the visual fatigue and asthenopia experienced by users of computer displays?

Ultraviolet radiation (Correct answer)
Window glare
Uncompensated astigmatism
Screen reflections

Correct answer: Ultraviolet radiation

Explanation: While ultraviolet (UV) radiation can have detrimental effects on the eyes, it is not typically emitted by computer displays. Screen reflections, window glare, and uncompensated astigmatism are more common factors contributing to visual fatigue and asthenopia when using computer displays. UV radiation is more commonly associated with outdoor exposure or exposure to sources such as sunlight and certain artificial light sources, rather than computer screens.

Question 42: A patient has a complete right sixth nerve (CN VI) palsy. What is the characteristic eye position in primary gaze?

Right hypertropia
No deviation in primary gaze
Right eye esotropia (converged) (Correct answer)
Right eye exotropia (diverged)

Correct answer: Right eye esotropia (converged)

CN VI palsy paralyzes the lateral rectus; the unopposed action of the medial rectus causes the affected eye to deviate nasally, producing an esotropia.

Question 43: Which test is used to distinguish a functional (non-organic) visual field loss from a true organic field defect?

Confrontation testing with varying distances showing a tubular (non-expanding) field (Correct answer)
Color vision testing with Farnsworth-Munsell
Pattern visual evoked potentials (VEP)
Optical coherence tomography

Correct answer: Confrontation testing with varying distances showing a tubular (non-expanding) field

In functional vision loss the visual field does not expand appropriately with distance (tubular field), whereas a true scotoma subtends a consistent visual angle at any test distance.

Question 44: Internuclear ophthalmoplegia (INO) is caused by a lesion in which structure?

Medial longitudinal fasciculus (MLF) (Correct answer)
Abducens nucleus
Trochlear nerve fascicle
Oculomotor nucleus

Correct answer: Medial longitudinal fasciculus (MLF)

INO results from disruption of the MLF, which connects the contralateral abducens nucleus to the ipsilateral medial rectus subnucleus, impairing adduction.

Question 45: A patient has a right homonymous hemianopia with macular sparing. Where is the lesion most likely located?

Left optic radiation (Meyer's loop)
Left occipital lobe (Correct answer)
Left lateral geniculate nucleus
Left optic tract

Correct answer: Left occipital lobe

Macular-sparing homonymous hemianopia localizes to the occipital cortex because the macula has dual blood supply and a large cortical representation at the occipital pole.

Question 46: Which condition causes disc edema, vision loss, and pain on eye movement, most often in young women?

Optic neuritis (Correct answer)
Leber hereditary optic neuropathy
Non-arteritic ischemic optic neuropathy
Papilledema

Correct answer: Optic neuritis

Optic neuritis classically presents in young women with subacute monocular vision loss, periorbital pain worsened by eye movement, and a central scotoma; it is strongly associated with multiple sclerosis.

Question 47: When evaluating a rigid gas permeable (RGP) lens fit on a normal cornea using sodium fluorescein, the ideal fitting relationship shows:

Central fluorescein pooling only with a sealed edge
Alignment fit with minimal apical touch and moderate peripheral edge lift (Correct answer)
Full apical clearance with heavy edge bearing and no tear exchange
Three-point touch with no peripheral clearance

Correct answer: Alignment fit with minimal apical touch and moderate peripheral edge lift

An ideal RGP fit on a normal cornea demonstrates alignment with minimal apical touch and adequate peripheral clearance to allow tear exchange and prevent peripheral seal-off.

Question 48: Which parameter best describes the oxygen transmissibility of a contact lens material of a given thickness?

Wetting angle
Dk/t value (Correct answer)
Lens modulus of elasticity
Water content percentage

Correct answer: Dk/t value

Dk/t combines the oxygen permeability (Dk) of the material and lens thickness (t), making it the best indicator of how much oxygen reaches the cornea.

Question 49: Patient findings: A 27-year-old female presents after an airbag injury to her right eye the previous day. Examination reveals a relative afferent pupillary defect and light-perception vision OD. The patient's extraocular muscle motility is normal. The IOP is 12 mmHg OD. Other than mild right eyelid chemosis and hematoma, there is no external evidence of trauma. The fundus examination is unremarkable. All findings are normal OS. Which 2 of the following are least likely to be found on CT scan of the head and orbit?

Hyperdense area in the occipital lobe (Correct answer)
Cerebrospinal fluid leak (Correct answer)
Bone impingement of the optic nerve
Optic nerve sheath hematoma
Orbital emphysema

Correct answer: Hyperdense area in the occipital lobe

Explanation: Given the specific eye injury and symptoms, a cerebrospinal fluid leak and a hyperdense area in the occipital lobe are less directly related to the described presentation of traumatic optic neuropathy. The more likely findings would involve structures closer to the orbit and optic nerve.

Question 50: Which peripheral retinal degeneration is considered a significant risk factor for rhegmatogenous retinal detachment?

Drusen
Lattice degeneration (Correct answer)
Pavingstone degeneration
Microcystoid degeneration

Correct answer: Lattice degeneration

Lattice degeneration causes thinning of the peripheral retina with overlying vitreous liquefaction and strong vitreoretinal adhesions at its edges, predisposing to tears and detachment.

Question 51: What is the pupillary light reflex?

The automatic constriction of the pupil in response to increased light intensity, mediated by the parasympathetic nervous system (Correct answer)
Dilation of the pupil in bright light
Blinking in response to bright light
The production of tears in bright light

Correct answer: The automatic constriction of the pupil in response to increased light intensity, mediated by the parasympathetic nervous system

The pupillary light reflex constricts both pupils (direct and consensual response) when light stimulates retinal photoreceptors, controlled by the parasympathetic pathway through the oculomotor nerve (CN III).

Question 52: A 72-year-old patient is found to have white, flaky material on the pupillary margin and anterior lens capsule of the right eye during a routine exam. Gonioscopy reveals a hyperpigmented trabecular meshwork. This patient is at a significantly increased risk for developing which of the following conditions?

Secondary open-angle glaucoma (Correct answer)
Uveitic glaucoma
Angle-closure glaucoma
Neovascular glaucoma

Correct answer: Secondary open-angle glaucoma

The clinical signs describe pseudoexfoliation syndrome (PEX), a systemic condition where abnormal fibrillar material is deposited on various ocular structures. This material and associated pigment can clog the trabecular meshwork, leading to increased intraocular pressure and a high risk of developing secondary open-angle glaucoma (pseudoexfoliation glaucoma).

Question 53: Prism ballast stabilization used in soft toric contact lenses works by:

Thinning the superior and inferior lens zones to allow lid attachment
Using a truncated inferior edge that aligns with the lower lid margin
Adding base-down prism that weights the inferior lens, using gravity and lid forces to resist rotation (Correct answer)
Creating an aspherical back surface that locks onto the corneal toricity

Correct answer: Adding base-down prism that weights the inferior lens, using gravity and lid forces to resist rotation

Prism ballast incorporates a wedge of base-down prism that makes the inferior portion of the lens thicker and heavier, using gravity and upper lid pressure to maintain rotational orientation.

Question 54: The near point of accommodation (NPA) of a patient wearing a +1.25 D Add over his best distance correction is 19 cm. If the Add is removed, the NPA would then be at approximately:

25 cm (Correct answer)
30 cm
20 cm
15 cm

Correct answer: 25 cm

Explanation: The near point of accommodation (NPA) is the closest point to the eyes at which clear vision is maintained through accommodation. When a patient wears a reading addition (Add), the NPA is brought closer. Removing the Add will push the NPA farther away. Since the patient's NPA with the Add is 19 cm, removing the Add would approximate the NPA to be at a greater distance, around 25 cm.

Question 55: What is the tear film and what are its layers?

A single layer of water on the cornea
A contact lens coating
A three-layer film (lipid, aqueous, mucin) covering the cornea that provides lubrication, nutrition, and protection (Correct answer)
A surgical membrane

Correct answer: A three-layer film (lipid, aqueous, mucin) covering the cornea that provides lubrication, nutrition, and protection

The tear film has three functional components: the outer lipid layer (prevents evaporation), the middle aqueous layer (provides nutrition and defense), and the inner mucin layer (helps tears adhere to the corneal surface).

Question 56: A 28-year-old female presents with a painful, red, light-sensitive left eye for the past two days. Slit lamp examination reveals circumlimbal injection, 2+ anterior chamber cells, fine keratic precipitates (KPs) on the endothelium, and a miotic pupil. Intraocular pressure is normal. What is the MOST appropriate initial treatment plan?

Topical antibiotic and a warm compress
Topical corticosteroid and a cycloplegic agent (Correct answer)
Topical NSAID and referral for blood work
Oral antiviral medication and artificial tears

Correct answer: Topical corticosteroid and a cycloplegic agent

The patient's signs and symptoms—unilateral pain, photophobia, circumlimbal injection, anterior chamber cells, and KPs—are classic for acute anterior uveitis. The standard of care is to control inflammation with a topical corticosteroid (e.g., prednisolone acetate) and manage pain and prevent posterior synechiae with a cycloplegic agent (e.g., homatropine or cyclopentolate).

Question 57: Which of the following clinical findings is most useful for differentiating allergic conjunctivitis from viral conjunctivitis?

Presence of watery discharge
Follicular response on the palpebral conjunctiva
Bilateral eye redness (hyperemia)
Patient complaint of significant itching (Correct answer)

Correct answer: Patient complaint of significant itching

While both allergic and viral conjunctivitis can present with watery discharge, redness, and follicles, intense itching (pruritus) is the hallmark symptom of allergic conjunctivitis and is typically much more pronounced than in viral cases.

Question 58: A patient has a mucopurulent discharge from a lesion of the right lower eyelid. Which of the following ophthalmic ointments would be most effective to use if a Gram stain of the discharge reveals predominantly polymorphonuclear leukocytes and Gram-negative organisms?

Erythromycin
Sulfacetamide
Ciprofloxacin (Correct answer)
Fluorometholone

Correct answer: Ciprofloxacin

Explanation: Ciprofloxacin is an effective antibiotic against Gram-negative organisms. Given that the Gram stain reveals predominantly polymorphonuclear leukocytes and Gram-negative organisms, ciprofloxacin would be the most appropriate choice for treating the infection.

Question 59: Which 2 of the following are most appropriate in the initial management of an adult male who is experiencing an acute anaphylactic reaction?

Perform the Heimlich maneuver.
Expose the patient to ammonia inhalants.
Give the patient orange juice.
Instruct a bystander to call 911 immediately. (Correct answer)
Administer systemic epinephrine. (Correct answer)
Have the patient breathe into a paper bag.

Correct answer: Instruct a bystander to call 911 immediately.

Explanation: In the initial management of an acute anaphylactic reaction, it is crucial to administer systemic epinephrine, as it is the first-line treatment to counteract the severe allergic response. Additionally, calling 911 ensures that the patient receives prompt medical attention and further necessary treatment.

Question 60: Which FDA contact lens group is characterized by both high water content and ionic properties, making it most susceptible to protein deposits?

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

Correct answer: Group IV

FDA Group IV lenses have high water content (≥50%) and are ionic, which promotes protein binding and deposit formation on the lens surface.

Question 61: What is the macula and why is it clinically significant?

A type of eye infection
The white part of the eye
A structure in the eyelid
The central area of the retina responsible for high-acuity color vision; its degeneration is the leading cause of central vision loss in older adults (Correct answer)

Correct answer: The central area of the retina responsible for high-acuity color vision; its degeneration is the leading cause of central vision loss in older adults

The macula contains the highest concentration of cone photoreceptors, especially at the fovea, providing central vision for reading and facial recognition. Age-related macular degeneration (AMD) damages this critical area.

Question 62: A 78-year-old white female tells you that the vision in her right eye gradually has been worsening for the past 2 months. You find that her best corrected visual acuities are 20/60 OD and 20/20 OS. Ophthalmoscopy and macular OCT reveal hemorrhage due to a subfoveal choroidal neovascular membrane OD. Of the following, which is the best management for this patient's right eye?

Intravitreal bevacizumab (Correct answer)
Prednisone
Follow-up retinal examination in 3 months
Direct argon laser photocoagulation

Correct answer: Intravitreal bevacizumab

Explanation: Intravitreal bevacizumab is an anti-VEGF (vascular endothelial growth factor) treatment effective for managing choroidal neovascular membranes, which are associated with conditions like age-related macular degeneration. This treatment helps reduce hemorrhage and neovascularization, thus improving or stabilizing vision.

Question 63: Which contact lens-related complication presents with deep stromal infiltrates, significant anterior chamber reaction, mucopurulent discharge, and severe pain, representing the most vision-threatening condition?

Infiltrative keratitis
Contact lens peripheral ulcer (CLPU)
Superior epithelial arcuate lesion (SEAL)
Microbial keratitis (Correct answer)

Correct answer: Microbial keratitis

Microbial keratitis presents with deep stromal infiltrates, severe pain, and discharge, and represents the most serious and vision-threatening contact lens-related complication.

Question 64: A 3-year-old presents with esotropia that is greater at near (30 PD) than at distance (15 PD), even after full hyperopic correction of +4.00 D OU is prescribed. This is a classic presentation of accommodative esotropia with a high AC/A ratio. Which of the following is the most appropriate next step in optical management?

Recommend immediate surgical correction
Increase the single vision plus prescription
Prescribe bifocal lenses with a near add (Correct answer)
Prescribe base-out prism in a single vision lens

Correct answer: Prescribe bifocal lenses with a near add

When a child has accommodative esotropia with a high accommodative convergence to accommodation (AC/A) ratio, the esotropia is greater at near fixation due to the increased accommodative convergence. After providing the full distance hyperopic correction, a residual near esotropia often remains. Prescribing a bifocal or progressive addition lens provides additional plus power for near work, which relaxes accommodation and consequently reduces the near esotropia, helping to restore binocularity. [22, 24, 29]

Question 65: What is the optical center of a lens?

The physical center of the lens
The point on the lens through which light passes without being deviated by prismatic effect, which must align with the patient's pupil (Correct answer)
The thickest part of the lens
The point where the lens is mounted in the frame

Correct answer: The point on the lens through which light passes without being deviated by prismatic effect, which must align with the patient's pupil

The optical center must be positioned precisely at the patient's pupillary distance (PD) and height. Misalignment induces unwanted prismatic effect, causing eyestrain, headaches, and potentially diplopia.

Question 66: A 7-year-old patient has acute streptococcal erysipelas involving the eyelids. Which of the following is the best oral medication for this patient?

Doxycycline
Tetracycline
Penicillin V (Correct answer)
Cyclosporine

Correct answer: Penicillin V

Explanation: Penicillin V is the best oral medication for treating acute streptococcal infections, such as erysipelas. It is effective against Streptococcus bacteria, which is the cause of the condition. Tetracycline and doxycycline are not typically used in children due to potential side effects, and cyclosporine is an immunosuppressant, not an antibiotic.

Question 67: Orthokeratology contact lenses are designed to achieve their primary refractive effect through which mechanism?

Permanently ablating the central corneal stroma during overnight wear
Providing multifocal correction to reduce accommodative demand
Stabilizing corneal ectasia by mechanical compression of the cone
Temporarily reshaping the corneal epithelium via reverse geometry lenses worn during sleep (Correct answer)

Correct answer: Temporarily reshaping the corneal epithelium via reverse geometry lenses worn during sleep

Orthokeratology uses reverse geometry RGP lenses worn overnight to temporarily redistribute and reshape the corneal epithelium, flattening the center and steepening the midperiphery to reduce myopia.

Question 68: Which multifocal contact lens design presents both distance and near focal points to the retina simultaneously regardless of gaze direction?

Aspheric single-vision lens with extended depth of focus
Simultaneous vision concentric ring design (Correct answer)
Alternating translating bifocal design
Modified monovision with distance-dominant lens

Correct answer: Simultaneous vision concentric ring design

Simultaneous vision designs use concentric alternating zones of distance and near power so both focal points are always projected onto the retina, relying on neural adaptation to select the appropriate image.

Question 69: What is vertex distance and why does it matter?

The distance from the back surface of a spectacle lens to the front of the cornea, which affects the effective power of the lens (Correct answer)
The focal length of the lens
The distance between a patient's two eyes
The thickness of the lens at its center

Correct answer: The distance from the back surface of a spectacle lens to the front of the cornea, which affects the effective power of the lens

Vertex distance (typically 12-14mm) affects effective lens power. For prescriptions over ±4.00D, changes in vertex distance require power adjustment. Contact lens prescriptions must be adjusted from spectacle prescriptions for this reason.

Question 70: What is the pharmacological treatment for acute angle-closure glaucoma?

Emergency IOP reduction with topical beta-blockers, alpha-agonists, pilocarpine, and oral or IV acetazolamide, followed by laser iridotomy (Correct answer)
Warm compresses and rest
Wait and observe without treatment
Topical antibiotics only

Correct answer: Emergency IOP reduction with topical beta-blockers, alpha-agonists, pilocarpine, and oral or IV acetazolamide, followed by laser iridotomy

Acute angle closure is an emergency requiring rapid IOP reduction using multiple agents simultaneously: timolol, apraclonidine, pilocarpine (to open the angle), and acetazolamide (to reduce aqueous production). Definitive treatment is laser iridotomy.

Question 71: Giant papillary conjunctivitis (GPC) is defined by papillae on the upper tarsal conjunctiva that are larger than:

0.3 mm
1.0 mm (Correct answer)
0.1 mm
0.5 mm

Correct answer: 1.0 mm

GPC is characterized by papillae larger than 1.0 mm on the upper tarsal conjunctiva, differentiating it from normal papillary response.

Question 72: Which treatment is first-line for neovascular (wet) age-related macular degeneration?

Photodynamic therapy
Oral antioxidant vitamins
Intravitreal anti-VEGF injections (Correct answer)
Laser photocoagulation

Correct answer: Intravitreal anti-VEGF injections

Intravitreal anti-VEGF agents (ranibizumab, bevacizumab, aflibercept) are the first-line treatment for wet AMD, reducing CNV leakage and improving visual acuity.

Question 73: A 55-year-old patient presents with chronic symptoms of burning, grittiness, and fluctuating vision. Examination reveals telangiectatic vessels on the eyelid margins, inspissated meibomian glands with frothy tear film, and a rapid tear break-up time. What is the MOST appropriate initial management strategy for this condition?

Instruction on warm compresses, lid massage, and eyelid hygiene (Correct answer)
A short course of a potent topical steroid
Prescription of oral acetazolamide
Long-term topical antibiotic therapy

Correct answer: Instruction on warm compresses, lid massage, and eyelid hygiene

The patient's signs and symptoms are characteristic of posterior blepharitis, or meibomian gland dysfunction (MGD). The cornerstone and first-line treatment for MGD is patient education on implementing a daily routine of warm compresses to melt the solidified meibum, followed by gentle lid massage and cleansing of the lid margins.

Question 74: Which retinal layer contains the photoreceptor cell bodies?

Inner nuclear layer
Retinal pigment epithelium
Ganglion cell layer
Outer nuclear layer (Correct answer)

Correct answer: Outer nuclear layer

The outer nuclear layer contains the nuclei and cell bodies of both rod and cone photoreceptors.

Question 75: In a branch retinal vein occlusion (BRVO), hemorrhages are typically confined to which area?

One quadrant of the fundus following a vascular distribution (Correct answer)
Only the peripapillary area
The entire posterior pole
The macular region exclusively

Correct answer: One quadrant of the fundus following a vascular distribution

BRVO hemorrhages are restricted to the drainage territory of the occluded branch vein, appearing in one quadrant along a vascular arcuate distribution.

Question 76: Which of the following best describes an optometrist's ethical obligation when an examination reveals a confidential finding, such as acuity below the minimum requirements necessary to operate a motor vehicle?

The optometrist is obligated to tell the patient the acuity findings, but make no comment about driving.
The optometrist may divulge the information as he/she deems appropriate.
The optometrist is expected to use the information only for the benefit of the patient. (Correct answer)
The optometrist is obligated to never share the information with anyone.

Correct answer: The optometrist is expected to use the information only for the benefit of the patient.

Explanation: Optometrists have an ethical obligation to prioritize the well-being of their patients. This includes using confidential information obtained during examinations solely for the benefit of the patient's health and safety. Therefore, the optometrist should use the information to provide appropriate recommendations and interventions to ensure the patient's visual health and safety, which may include discussing concerns about driving if necessary.

Question 77: In diabetic patients, a relative increase in which of the following refractive conditions is MOST associated with an increase in serum glucose levels?

Anisometropia
Myopia (Correct answer)
Astigmatism
Hyperopia

Correct answer: Myopia

Explanation: An increase in serum glucose levels in diabetic patients is most associated with a relative increase in myopia. This is because fluctuations in blood sugar levels can cause changes in the refractive state of the eye, leading to temporary increases in myopia.

Question 78: A 21-year-old patient has a history of previously uncorrected simply hyperopic astigmatism of 3.00 D in each eye. Which of the following is MOST likely to be associated with the patient's refractive error?

Eccentric fixation in one or both eyes
Meridional amblyopia in both eyes (Correct answer)
Monocular central suppression
Strabismus secondary to the uncorrected refractive error
Anomalous correspondence

Correct answer: Meridional amblyopia in both eyes

Explanation: Simply hyperopic astigmatism, especially if uncorrected during childhood, can lead to meridional amblyopia in both eyes. This occurs when the brain suppresses or ignores the blurred images from one or both eyes, resulting in reduced visual acuity.

Question 79: What is visual field testing and what does it detect?

A test measuring peripheral and central vision sensitivity to detect damage from glaucoma, neurological conditions, and retinal disease (Correct answer)
A refraction procedure
A test of color vision
A measurement of eye alignment

Correct answer: A test measuring peripheral and central vision sensitivity to detect damage from glaucoma, neurological conditions, and retinal disease

Visual field testing (perimetry) maps the area and sensitivity of a patient's visual field, detecting scotomas (blind spots) that indicate optic nerve damage, retinal disease, or neurological conditions affecting the visual pathway.

Question 80: A patient presents with a 'curtain coming down' vision loss, flashes of light, and floaters. What is the most likely diagnosis?

Central retinal vein occlusion
Vitreous hemorrhage
Posterior vitreous detachment
Rhegmatogenous retinal detachment (Correct answer)

Correct answer: Rhegmatogenous retinal detachment

Rhegmatogenous retinal detachment classically presents with photopsia, floaters, and a scotoma described as a curtain moving across vision.

Question 81: The Jackson crossed cylinder subjective test begins with a -1.00 -1.75 x 090 lens in front of a patient's eye. If the correcting cylinder power is changed to -0.75 x 090, then the spherical power should now be:

+0.50 DS
-1.00 DS
-0.50 DS
-2.00 DS
-1.50 DS (Correct answer)

Correct answer: -1.50 DS

Explanation: In the Jackson crossed cylinder subjective test, when the correcting cylinder power is changed from -1.00 -1.75 x 090 to -0.75 x 090, the spherical power should be adjusted in the opposite direction. Since the cylinder power is being reduced by 0.25 D (from -1.75 to -1.00), the spherical power should be increased by the same amount to maintain the patient's prescription. Therefore, the new spherical power should be -1.50 DS.

Question 82: Patient findings: A 29-year-old Hispanic female complains of severe itching and redness in her right eye since yesterday when she was weeding her garden. Your examination reveals 3+ eyelid and conjunctival chemosis and 1+ injection OD. Which of the following drugs would be least effective in treating her condition?

Chlorpheniramine 4 mg
Olopatadine 0.1%
Cromolyn 4% (Correct answer)
Prednisolone acetate 0.12%

Correct answer: Cromolyn 4%

Explanation: Cromolyn 4% is the least effective in treating her condition. Cromolyn is a mast cell stabilizer used to prevent allergic reactions, but it is typically less effective for treating acute symptoms such as severe itching and redness compared to antihistamines like Chlorpheniramine or Olopatadine, which directly target histamine release and alleviate symptoms more quickly.

Question 83: A patient with sickle cell disease is at highest risk for which posterior segment complication?

Exudative retinal detachment
Central retinal artery occlusion
Choroidal neovascularization
Proliferative sickle cell retinopathy (Correct answer)

Correct answer: Proliferative sickle cell retinopathy

Sickle cell retinopathy progresses to a proliferative stage with sea-fan neovascularization, vitreous hemorrhage, and traction retinal detachment.

Question 84: What are artificial tears and when are they prescribed?

Lubricating eye drops that supplement the natural tear film, prescribed for dry eye disease, post-surgical care, and contact lens discomfort (Correct answer)
Antibacterial eye drops
Drops that increase tear production permanently
Drops that dilate the pupil

Correct answer: Lubricating eye drops that supplement the natural tear film, prescribed for dry eye disease, post-surgical care, and contact lens discomfort

Artificial tears come in various formulations (preserved, preservative-free, lipid-based, gel) to supplement deficient tear film, reduce symptoms of dryness, and protect the ocular surface.

Question 85: A patient's spectacle prescription is –10.00 DS at a vertex distance of 12 mm. When converting to a contact lens power, the contact lens should be:

More minus than the spectacle Rx due to reduced vertex distance
The same power because vertex distance only matters for plus lenses
More plus than the spectacle Rx to compensate for tear lens effect
Less minus than the spectacle Rx because the effective power increases at the corneal plane (Correct answer)

Correct answer: Less minus than the spectacle Rx because the effective power increases at the corneal plane

Moving a high minus lens closer to the eye (shorter vertex distance) increases its effective minus power at the corneal plane, so the contact lens must be prescribed with less minus power.

Question 86: What are cycloplegic and mydriatic agents used for in optometry?

They improve night vision
They lower intraocular pressure
They treat eye infections
Cycloplegics paralyze accommodation for accurate refraction; mydriatics dilate the pupil for fundus examination (Correct answer)

Correct answer: Cycloplegics paralyze accommodation for accurate refraction; mydriatics dilate the pupil for fundus examination

Cycloplegics (e.g., cyclopentolate) paralyze the ciliary muscle for objective refraction in children. Mydriatics (e.g., tropicamide) dilate the pupil for retinal examination. Some agents have both properties.

Question 87: Corneal neovascularization in contact lens wearers is primarily driven by which pathophysiologic mechanism?

Toxic preservative accumulation causing limbal inflammation
Mechanical irritation stimulating limbal cell proliferation
Allergic response to lens deposits activating mast cells
Chronic hypoxia inducing VEGF release from the corneal epithelium (Correct answer)

Correct answer: Chronic hypoxia inducing VEGF release from the corneal epithelium

Chronic corneal hypoxia triggers vascular endothelial growth factor (VEGF) release, stimulating new vessel ingrowth from the limbal vascular plexus into the avascular cornea.

Question 88: A 4-year-old child is undergoing a binocular vision evaluation. Using the Randot Preschool Stereoacuity Test, what level of stereoacuity would be considered within the normal range for this age?

200 seconds of arc
20 seconds of arc
400 seconds of arc
70 seconds of arc (Correct answer)

Correct answer: 70 seconds of arc

Normative data for stereoacuity shows a developmental progression. For a 4-year-old child, the median stereoacuity on the Randot test is typically around 70 seconds of arc. Expecting adult-like levels (e.g., 20-40 seconds of arc) is not appropriate, while gross stereopsis like 400 seconds of arc would be expected in a younger child or could indicate a problem. [1, 15, 26]

Question 89: What is accommodation?

The ability of the eye to change the shape of the crystalline lens to focus on objects at different distances (Correct answer)
The movement of the eye to track moving objects
The adjustment of pupil size
The adaptation of the retina to different light levels

Correct answer: The ability of the eye to change the shape of the crystalline lens to focus on objects at different distances

Accommodation involves ciliary muscle contraction releasing zonular tension, allowing the elastic lens to become more convex for near focus. This ability decreases with age (presbyopia) as the lens loses flexibility.

Question 90: In testing color vision for optic nerve disease, which test is most sensitive for detecting acquired dyschromatopsia?

City University Color Vision Test
Nagel anomaloscope
Farnsworth-Munsell 100-hue test (Correct answer)
Ishihara pseudoisochromatic plates

Correct answer: Farnsworth-Munsell 100-hue test

The FM 100-hue test is the most sensitive for acquired color defects from optic neuropathy, detecting subtle hue discrimination errors across the entire color spectrum.

Question 91: A contact lens patient presents with a small (<1 mm), round, white peripheral stromal infiltrate with overlying epithelial staining, minimal pain, and no anterior chamber reaction. The most likely diagnosis is:

Thygeson superficial punctate keratopathy
Contact lens peripheral ulcer (CLPU) (Correct answer)
Microbial keratitis
Acanthamoeba keratitis

Correct answer: Contact lens peripheral ulcer (CLPU)

CLPU presents as a small, round, peripheral stromal infiltrate with overlying epithelial staining in extended wear users, and is distinguished from microbial keratitis by its peripheral location, small size, and minimal pain.

Question 92: Which visual field defect is produced by a lesion at the optic chiasm?

Right homonymous hemianopia
Monocular central scotoma
Binasal hemianopia
Bitemporal hemianopia (Correct answer)

Correct answer: Bitemporal hemianopia

A chiasmal lesion (commonly a pituitary adenoma) damages crossing nasal fibers, resulting in loss of both temporal fields — bitemporal hemianopia.

Question 93: What is the optic nerve and what condition damages it?

A structure that produces tears
The nerve carrying visual information from the retina to the brain; glaucoma progressively damages it, causing irreversible vision loss (Correct answer)
A muscle that moves the eye
The blood supply to the retina

Correct answer: The nerve carrying visual information from the retina to the brain; glaucoma progressively damages it, causing irreversible vision loss

The optic nerve (cranial nerve II) contains approximately 1.2 million nerve fibers transmitting visual signals. Glaucoma damages these fibers, typically starting with peripheral vision loss that progresses centrally.

Question 94: What is dry eye disease and how is it managed?

A refractive error
An infection requiring antibiotics
A condition that only occurs in deserts
A multifactorial condition of tear film instability causing discomfort and visual disturbance, managed with artificial tears, anti-inflammatory drops, and environmental modifications (Correct answer)

Correct answer: A multifactorial condition of tear film instability causing discomfort and visual disturbance, managed with artificial tears, anti-inflammatory drops, and environmental modifications

Dry eye results from insufficient tear production or excessive evaporation. Management includes artificial tears, prescription anti-inflammatory drops (cyclosporine, lifitegrast), warm compresses, omega-3 supplements, and environmental humidity.

Question 95: What is the diopter?

A type of eye disease
An instrument for measuring pupil size
A unit of visual acuity
The unit of measurement for the refractive power of a lens, equal to the reciprocal of the focal length in meters (Correct answer)

Correct answer: The unit of measurement for the refractive power of a lens, equal to the reciprocal of the focal length in meters

A diopter (D) measures lens power. A +1.00D lens has a focal length of 1 meter. Higher diopter values indicate stronger lenses. Minus lenses diverge light (myopia correction); plus lenses converge light (hyperopia correction).

Question 96: What medications are used to treat allergic conjunctivitis?

Topical steroids as first line
Oral antibiotics
Pupil-dilating drops
Topical antihistamine/mast cell stabilizer combination drops (e.g., olopatadine, ketotifen) and cold compresses (Correct answer)

Correct answer: Topical antihistamine/mast cell stabilizer combination drops (e.g., olopatadine, ketotifen) and cold compresses

Dual-action agents combining antihistamine (immediate relief) and mast cell stabilization (prevention) are first-line treatment. Artificial tears dilute allergens, and cool compresses reduce symptoms.

Question 97: Which stage of diabetic retinopathy is characterized by new blood vessels on the optic disc (NVD) or elsewhere (NVE)?

Clinically significant macular edema
Moderate nonproliferative diabetic retinopathy
Proliferative diabetic retinopathy (Correct answer)
Severe nonproliferative diabetic retinopathy

Correct answer: Proliferative diabetic retinopathy

Proliferative diabetic retinopathy is defined by the presence of retinal neovascularization (NVD or NVE) driven by ischemia-induced VEGF release.

Question 98: Patient findings: A 27-year-old female presents after an airbag injury to her right eye the previous day. Examination reveals a relative afferent pupillary defect and light-perception vision OD. The patient's extraocular muscle motility is normal. The IOP is 12 mmHg OD. Other than mild right eyelid chemosis and hematoma, there is no external evidence of trauma. The fundus examination is unremarkable. All findings are normal OS. Which of the following is the most likely diagnosis?

Traumatic optic neuropathy (Correct answer)
Commotio retinae
Occipital lobe hemorrhage
Cortical blindness
Traumatic glaucoma
Hysterical blindness

Correct answer: Traumatic optic neuropathy

Explanation: The presence of a relative afferent pupillary defect (RAPD) and light-perception vision in the affected eye, coupled with normal intraocular pressure and extraocular muscle motility, strongly suggests traumatic optic neuropathy. This condition can result from blunt trauma, such as an airbag injury, leading to damage to the optic nerve without visible fundus abnormalities.

Question 99: Patient findings: A 29-year-old Hispanic female complains of severe itching and redness in her right eye since yesterday when she was weeding her garden. Your examination reveals 3+ eyelid and conjunctival chemosis and 1+ injection OD. Which of the following is the most likely diagnosis?

Allergic conjunctivitis (Correct answer)
Vernal keratoconjunctivitis
Poison ivy dermatoconjunctivitis
Atopic conjunctivitis

Correct answer: Allergic conjunctivitis

Explanation: The patient's symptoms of severe itching, redness, and conjunctival chemosis, especially following exposure to an outdoor environment (weeding the garden), are most consistent with allergic conjunctivitis. This condition is commonly triggered by environmental allergens such as pollen.

Question 100: Which parameter describes the radius of curvature of the posterior surface of a contact lens?

Dk value
Back vertex power
Overall diameter
Base curve radius (Correct answer)

Correct answer: Base curve radius

The base curve radius defines the curvature of the posterior surface of the contact lens that interfaces with the tear film and cornea.

Question 101: What is a progressive addition lens (PAL)?

A disposable contact lens
A lens that changes color in sunlight
A single-vision lens with progressive tint
A multifocal lens with a gradual power change from distance at the top to near at the bottom, without visible dividing lines (Correct answer)

Correct answer: A multifocal lens with a gradual power change from distance at the top to near at the bottom, without visible dividing lines

PALs (no-line bifocals) provide seamless vision at all distances through a corridor of increasing plus power from the distance zone through intermediate to the near zone, with peripheral distortion areas.

Question 102: Superior epithelial arcuate lesions (SEAL) are primarily caused by which mechanism?

Chronic hypoxia from low Dk/t materials
Mechanical trauma from the edge of a soft contact lens (Correct answer)
Microbial colonization beneath the superior lens edge
Toxic reaction to preservatives in multipurpose solutions

Correct answer: Mechanical trauma from the edge of a soft contact lens

SEALs result from mechanical trauma where the upper eyelid forces the peripheral edge of a soft lens against the superior corneal epithelium, creating an arcuate split.

Question 103: What is the most common intracranial cause of a third nerve (CN III) palsy with pupil involvement?

Posterior communicating artery aneurysm (Correct answer)
Orbital apex syndrome
Diabetic ischemic neuropathy
Cavernous sinus thrombosis

Correct answer: Posterior communicating artery aneurysm

A posterior communicating artery aneurysm compresses the pupillomotor fibers on the outside of CN III, causing a complete third nerve palsy with a fixed, dilated pupil.

Question 104: Which pattern on automated perimetry (Humphrey visual field) is most characteristic of glaucomatous damage?

Central scotoma
Superior arcuate scotoma respecting the horizontal midline (Correct answer)
Altitudinal defect crossing the vertical midline
Bitemporal hemianopia

Correct answer: Superior arcuate scotoma respecting the horizontal midline

Glaucoma preferentially damages arcuate nerve fiber bundles, producing superior (or inferior) arcuate scotomas that follow the horizontal raphe and respect the horizontal midline.

Question 105: A Marcus Gunn pupil (relative afferent pupillary defect) indicates a lesion in which structure?

Edinger-Westphal nucleus
Oculomotor nerve (CN III)
Posterior commissure
Afferent visual pathway (optic nerve or retina) on the affected side (Correct answer)

Correct answer: Afferent visual pathway (optic nerve or retina) on the affected side

A RAPD indicates asymmetric afferent input, meaning the optic nerve or retina on the affected side transmits less light signal to the midbrain.

Question 106: What topical NSAIDs are used in optometric practice?

Ketorolac, bromfenac, and nepafenac, used for post-surgical inflammation, seasonal allergic conjunctivitis, and pain management (Correct answer)
NSAIDs are not available in eye drop form
Only oral NSAIDs are used in eye care
Topical NSAIDs are used only for glaucoma

Correct answer: Ketorolac, bromfenac, and nepafenac, used for post-surgical inflammation, seasonal allergic conjunctivitis, and pain management

Topical ophthalmic NSAIDs reduce prostaglandin-mediated inflammation and pain. They are commonly used after cataract surgery (to prevent macular edema), for seasonal allergy, and for post-refractive surgery pain.

Question 107: What are the side effects of topical corticosteroid eye drops?

Only mild stinging
Permanent pupil dilation
No side effects
Elevated intraocular pressure (steroid-induced glaucoma), posterior subcapsular cataract formation, and increased risk of infection (Correct answer)

Correct answer: Elevated intraocular pressure (steroid-induced glaucoma), posterior subcapsular cataract formation, and increased risk of infection

Prolonged topical steroid use can elevate IOP (steroid response), accelerate cataract formation, impair wound healing, and increase susceptibility to infections (herpes simplex, fungal), requiring careful monitoring.

Question 108: What is optical coherence tomography (OCT)?

A visual acuity chart
A surgical laser procedure
A type of contact lens
A non-invasive imaging technique that produces high-resolution cross-sectional images of retinal layers and the optic nerve (Correct answer)

Correct answer: A non-invasive imaging technique that produces high-resolution cross-sectional images of retinal layers and the optic nerve

OCT uses light interferometry to create detailed images of retinal architecture, enabling measurement of retinal nerve fiber layer thickness, macular thickness, and detection of fluid or structural abnormalities.

Question 109: As an emmetropic patient fixates an object at 33 cm, you find retinoscopic neutrality at a distance of 67 cm. You should conclude that the accommodative response:

leads the accommodative stimulus by 1.50 D
lags behind the accommodative stimulus by 1.50 D (Correct answer)
leads the accommodative stimulus by 3.00 D
lags behind the accommodative stimulus by 3.00 D

Correct answer: lags behind the accommodative stimulus by 1.50 D

Explanation: Retinoscopic neutrality occurring at a distance farther than the point of fixation indicates that accommodation is not fully relaxed. In this case, since the retinoscopic neutrality is found at 67 cm while fixating at 33 cm, there's a lag of accommodation. The difference in reciprocal distances (1/67 - 1/33) gives the amount of lag, which is approximately 1.50 D. Therefore, the accommodative response lags behind the accommodative stimulus by 1.50 D.

Question 110: Papilledema from raised intracranial pressure typically causes which early visual field defect?

Central scotoma
Superior altitudinal defect
Enlarged blind spot (Correct answer)
Constricted peripheral field

Correct answer: Enlarged blind spot

The earliest visual field defect in papilledema is enlargement of the physiologic blind spot due to peripapillary edema displacing photoreceptors around the disc.

Question 111: When evaluating a soft contact lens fit, which finding best indicates an optimal fit?

Full corneal coverage, good centration, and 0.5–1 mm movement with blink (Correct answer)
Complete limbal clearance with no movement on blink
Slight apical clearance with heavy edge lift
Tight fit with less than 0.1 mm lag on upgaze

Correct answer: Full corneal coverage, good centration, and 0.5–1 mm movement with blink

An ideal soft lens fit shows complete corneal coverage, good centration, and 0.5–1 mm of movement with each blink to allow adequate tear exchange.

Question 112: A 19-year-old patient reports needing frequent updates to their glasses prescription over the last two years. They complain of distorted vision and significant glare at night. Retinoscopy reveals a 'scissoring' reflex, and keratometry shows steep corneal curvatures with significant astigmatism. Which of the following is the MOST likely underlying condition?

Keratoconus (Correct answer)
Fuchs' endothelial dystrophy
Corneal warpage from contact lens wear
Pellucid marginal degeneration

Correct answer: Keratoconus

The combination of progressive myopic and astigmatic refractive error, distorted vision, glare, a scissoring reflex on retinoscopy, and steep keratometry readings are all classic early signs of keratoconus.

Question 113: What are anti-VEGF injections used to treat?

Cataracts
Wet age-related macular degeneration and diabetic macular edema by blocking vascular endothelial growth factor that drives abnormal blood vessel growth (Correct answer)
Dry eyes
Refractive errors

Correct answer: Wet age-related macular degeneration and diabetic macular edema by blocking vascular endothelial growth factor that drives abnormal blood vessel growth

Anti-VEGF agents (ranibizumab, aflibercept, bevacizumab) are injected intravitreally to inhibit abnormal blood vessel growth and leakage in wet AMD, diabetic retinopathy, and retinal vein occlusion.

Question 114: Non-arteritic anterior ischemic optic neuropathy (NAION) most commonly produces which visual field defect?

Bitemporal hemianopia
Arcuate scotoma
Central scotoma
Altitudinal field defect (inferior) (Correct answer)

Correct answer: Altitudinal field defect (inferior)

NAION infarcts the superior or inferior pole of the optic disc, causing an altitudinal (most often inferior) visual field defect that respects the horizontal meridian.

Question 115: Which cranial nerve palsy causes a patient to tilt their head away from the affected side to eliminate diplopia?

CN VI (abducens)
CN IV (trochlear) (Correct answer)
CN III (oculomotor)
CN VII (facial)

Correct answer: CN IV (trochlear)

A CN IV palsy causes ipsilateral hypertropia; patients compensate by tilting their head to the opposite shoulder, which reduces the excyclotorsion and hypertropia.

Question 116: A 6-year-old child with intermittent exotropia (X(T)) is asymptomatic, but the deviation is manifest more than 50% of the time. Which of the following is a common non-surgical management option used to improve control of the deviation and potentially delay surgery?

High plus lenses to stimulate accommodation
Over-minus lens therapy (Correct answer)
Base-in prism glasses
Binasal occlusion

Correct answer: Over-minus lens therapy

Over-minus lens therapy (e.g., prescribing an additional -2.00 D to -3.00 D over the cycloplegic refraction) is a non-surgical option used in intermittent exotropia. The additional minus power stimulates accommodative convergence, which in turn helps to control the exodeviation. This is often used for younger children to improve fusion and delay the need for surgery. [2, 3, 21]

Question 117: You place a 21-year-old female on oral tetracycline 250 mg po qid for 30 days. This long-term treatment may cause all of the following side effects, except:

papilledema.
skin photosensitivity.
gastrointestinal distress.
ototoxicity. (Correct answer)

Correct answer: ototoxicity.

Explanation: Long-term treatment with tetracycline can cause side effects such as skin photosensitivity, papilledema, and gastrointestinal distress. However, ototoxicity (damage to the ear leading to hearing loss) is not typically associated with tetracycline.

Question 118: What is intraocular pressure (IOP) and what maintains it?

The tension of the extraocular muscles
Blood pressure in the retinal vessels
The pressure of the vitreous gel
The fluid pressure inside the eye, maintained by the balance between aqueous humor production by the ciliary body and drainage through the trabecular meshwork (Correct answer)

Correct answer: The fluid pressure inside the eye, maintained by the balance between aqueous humor production by the ciliary body and drainage through the trabecular meshwork

IOP (normal: 10-21 mmHg) is maintained by aqueous humor produced by the ciliary body flowing through the pupil and draining through the trabecular meshwork. Elevated IOP is a major risk factor for glaucoma.

Question 119: Cavernous sinus syndrome can cause palsies of all of the following cranial nerves EXCEPT which one?

CN III (oculomotor)
CN VI (abducens)
CN II (optic nerve) (Correct answer)
CN IV (trochlear)

Correct answer: CN II (optic nerve)

The optic nerve passes through the optic canal, not the cavernous sinus; CN III, IV, V1, V2, and VI all pass through or alongside the cavernous sinus and can be affected.

Question 120: An eye under the influence of an extremely strong miotic agent has a pupil diameter of 1 mm. The resolution of this eye is considered to be limited by:

radial astigmatism
spherical aberration
depth of focus
coma
diffraction (Correct answer)

Correct answer: diffraction

Explanation: When the pupil diameter is very small (like 1 mm under the influence of an extremely strong miotic agent), the resolution of the eye is mainly limited by diffraction. Diffraction causes light waves to bend around the edges of the pupil, leading to a blurring effect on the image formed on the retina.

Question 121: Scleral contact lenses vault completely over the cornea and limbus, resting on which tissue?

The bulbar conjunctiva overlying the sclera (Correct answer)
The palpebral fissure margin
The upper tarsal conjunctiva
The peripheral cornea at the limbal zone

Correct answer: The bulbar conjunctiva overlying the sclera

Scleral lenses bear entirely on the bulbar conjunctiva overlying the sclera, completely vaulting the cornea and limbus with a fluid reservoir beneath.

Question 122: What are the extraocular muscles and how many are there?

Three muscles controlling the iris
Eight muscles surrounding the orbit
Two muscles: up and down
Six muscles that control eye movement: four rectus muscles (superior, inferior, medial, lateral) and two oblique muscles (superior, inferior) (Correct answer)

Correct answer: Six muscles that control eye movement: four rectus muscles (superior, inferior, medial, lateral) and two oblique muscles (superior, inferior)

Six extraocular muscles precisely control each eye's movement in all directions. Dysfunction of these muscles or their cranial nerve innervation (CN III, IV, VI) causes strabismus and diplopia.

Question 123: Idiopathic intracranial hypertension (pseudotumor cerebri) is most commonly associated with which demographic?

Obese women of childbearing age (Correct answer)
Children with viral infections
Elderly men with hypertension
Thin young men with autoimmune disease

Correct answer: Obese women of childbearing age

IIH predominantly affects obese women of childbearing age; weight loss is the most effective long-term treatment, and lumbar puncture opening pressure exceeds 25 cmH2O.

Question 124: What is amblyopia and how is it treated?

An eye infection in adults
A type of cataract
Reduced vision in one eye due to abnormal visual development, treated by forcing use of the weaker eye through patching or atropine penalization of the stronger eye (Correct answer)
Color blindness

Correct answer: Reduced vision in one eye due to abnormal visual development, treated by forcing use of the weaker eye through patching or atropine penalization of the stronger eye

Amblyopia ('lazy eye') occurs when the brain favors one eye during visual development. Treatment before age 7-8 has the best outcomes, using occlusion (patching) or pharmacological penalization to strengthen the weaker eye.

Question 125: What is a photochromic lens?

A prescription for nearsightedness
A type of progressive lens
A lens containing molecules that darken when exposed to UV light and return to clear indoors (Correct answer)
A lens that permanently changes color

Correct answer: A lens containing molecules that darken when exposed to UV light and return to clear indoors

Photochromic lenses (like Transitions) contain silver halide or organic photochromic molecules that reversibly darken in response to UV radiation, providing convenient sun protection that adapts to lighting conditions.

Question 126: What is the hallmark OCT finding in central serous chorioretinopathy (CSCR)?

Epiretinal membrane with retinal folds
Subretinal fluid beneath the neurosensory retina (Correct answer)
Drusen under the RPE
Intraretinal fluid in the outer plexiform layer

Correct answer: Subretinal fluid beneath the neurosensory retina

CSCR is characterized by a serous detachment of the neurosensory retina overlying a focal RPE leak, appearing as subretinal fluid on OCT.

Question 127: What is blue light filtering in ophthalmic lenses?

Lens treatments or materials that selectively filter high-energy visible (blue) light from digital screens and sunlight (Correct answer)
A type of UV protection
A coating that makes lenses appear blue
A test for color blindness

Correct answer: Lens treatments or materials that selectively filter high-energy visible (blue) light from digital screens and sunlight

Blue light filtering lenses reduce transmission of 400-450nm wavelength light, which is emitted by digital devices and LED lighting. They may reduce digital eye strain, though research on their effectiveness continues to evolve.

Question 128: According to the Amblyopia Treatment Studies (ATS), which of the following is an effective initial treatment for a 5-year-old child with moderate amblyopia (20/80) due to strabismus?

Daily patching of the sound eye for 2 hours (Correct answer)
Full-time occlusion of the sound eye
Weekend-only patching of the amblyopic eye
Prescription of spectacles alone for 6 months

Correct answer: Daily patching of the sound eye for 2 hours

The Pediatric Eye Disease Investigator Group (PEDIG) Amblyopia Treatment Studies (ATS) demonstrated that for moderate amblyopia (20/40 to 20/100) in children aged 3 to <7 years, patching the sound eye for 2 hours daily is as effective as patching for 6 hours daily. [16, 17, 18] This minimal effective dose is often preferred to enhance compliance.

Question 129: A flame-shaped hemorrhage in the nerve fiber layer is most commonly associated with which condition?

Diabetic retinopathy
Age-related macular degeneration
Branch retinal artery occlusion
Hypertensive retinopathy (Correct answer)

Correct answer: Hypertensive retinopathy

Hypertensive retinopathy produces flame-shaped (splinter) hemorrhages because elevated blood pressure ruptures nerve fiber layer vessels that spread along axonal bundles.

Question 130: What is prism in ophthalmic lenses?

A measurement of lens thickness
An optical element that shifts the apparent position of images to correct binocular vision problems like strabismus and convergence issues (Correct answer)
A type of lens tint
A decorative lens coating

Correct answer: An optical element that shifts the apparent position of images to correct binocular vision problems like strabismus and convergence issues

Prism lenses bend light to shift the image position, helping align images for both eyes in patients with strabismus, convergence insufficiency, or diplopia, measured in prism diopters with a specified base direction.

Question 131: Retinitis pigmentosa classically causes which type of visual field defect?

Altitudinal defect
Annular (ring) scotoma (Correct answer)
Central scotoma
Temporal hemianopia

Correct answer: Annular (ring) scotoma

RP primarily destroys peripheral rod photoreceptors, producing a progressive ring scotoma in the mid-periphery that expands toward central and peripheral vision.

Question 132: Macular pucker (epiretinal membrane) is best evaluated with which imaging modality?

Fundus autofluorescence
Fluorescein angiography
Visual field testing
Optical coherence tomography (OCT) (Correct answer)

Correct answer: Optical coherence tomography (OCT)

OCT clearly delineates the epiretinal membrane as a hyperreflective layer on the inner retinal surface and quantifies associated retinal distortion and thickening.

Question 133: What is presbyopia?

An infection of the eye
A childhood vision problem
The age-related loss of accommodation (near focusing ability) due to hardening of the crystalline lens, typically becoming noticeable after age 40 (Correct answer)
A type of color blindness

Correct answer: The age-related loss of accommodation (near focusing ability) due to hardening of the crystalline lens, typically becoming noticeable after age 40

Presbyopia occurs as the crystalline lens gradually loses elasticity with age, reducing its ability to change shape for near focus. Corrected with reading glasses, bifocals, progressives, or multifocal contact lenses.

Question 134: What is anti-reflective (AR) coating on lenses?

A UV-blocking tint
A water-repellent treatment
A scratch-resistant coating
A multi-layer thin-film coating that reduces light reflection from lens surfaces, improving visual clarity, reducing glare, and enhancing cosmetic appearance (Correct answer)

Correct answer: A multi-layer thin-film coating that reduces light reflection from lens surfaces, improving visual clarity, reducing glare, and enhancing cosmetic appearance

AR coatings use thin layers of metal oxides that cause destructive interference of reflected light, increasing light transmission through the lens from ~92% to ~99%, reducing ghost images and improving night driving vision.

Question 135: Toxoplasma retinochoroiditis typically presents with which characteristic fundus finding?

Subretinal fluid with RPE detachment
Active white lesion adjacent to an old pigmented chorioretinal scar ('headlight in fog') (Correct answer)
Bilateral disc edema with peripapillary hemorrhages
Diffuse retinal whitening with cherry-red spot

Correct answer: Active white lesion adjacent to an old pigmented chorioretinal scar ('headlight in fog')

Toxoplasma retinochoroiditis classically shows a fluffy white active satellite lesion adjacent to a hyperpigmented old scar, described as a headlight in the fog.

Question 136: What is age-related macular degeneration (AMD)?

An infection of the macula
A congenital condition present at birth
A type of cataract
A progressive disease affecting the macula causing central vision loss, existing in dry (atrophic) and wet (neovascular) forms (Correct answer)

Correct answer: A progressive disease affecting the macula causing central vision loss, existing in dry (atrophic) and wet (neovascular) forms

Dry AMD (85-90% of cases) involves drusen deposits and atrophy. Wet AMD involves abnormal blood vessel growth under the retina that leaks fluid and blood, causing rapid central vision loss. Anti-VEGF injections treat wet AMD.

Question 137: What is high-index lens material?

Lens material with a higher refractive index that bends light more efficiently, allowing thinner and lighter lenses for strong prescriptions (Correct answer)
A lens that blocks blue light
A lens material for children only
The cheapest lens option

Correct answer: Lens material with a higher refractive index that bends light more efficiently, allowing thinner and lighter lenses for strong prescriptions

High-index materials (1.67, 1.74) bend light more per unit of thickness than standard materials (1.50 CR-39), allowing significantly thinner and lighter lenses for high prescriptions, improving comfort and cosmetics.

Question 138: A lens is made of glass with a refractive index of 1.65. What would be the refractive index for the ideal anti-reflection coating?

1.34
1.28 (Correct answer)
1.49
1.65
1.41

Correct answer: 1.28

Explanation: An ideal anti-reflection coating aims to minimize reflection by having a refractive index that's the geometric mean of the lens material (1.65) and air (approximately 1.0). So, the coating's refractive index would be approximately 1.28.

Question 139: What class of medication is used as first-line treatment for glaucoma?

Corticosteroids
Prostaglandin analogs (e.g., latanoprost) that increase uveoscleral outflow to lower intraocular pressure (Correct answer)
Antihistamines
Antibiotics

Correct answer: Prostaglandin analogs (e.g., latanoprost) that increase uveoscleral outflow to lower intraocular pressure

Prostaglandin analogs are the most commonly prescribed first-line glaucoma medications, reducing IOP by 25-33% through increased outflow of aqueous humor via the uveoscleral pathway, with once-daily dosing.

NBEO Part II Patient Assessment & Management (PAM) / TMOD Examination

The NBEO Part II PAM/TMOD is a comprehensive case-based clinical examination that assesses optometry candidates across all major clinical domains including ocular disease diagnosis, neuro-optometric conditions, posterior segment pathology, and treatment management. It is required for licensure in all U.S. states and Canadian provinces.

350

Questions

420 min

Time Limit

70%

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