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

Question 1: A patient presents with a 'curtain coming down' vision loss, flashes of light, and floaters. What is the most likely diagnosis?

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

Correct answer: Rhegmatogenous retinal detachment

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

Question 2: What class of medication is used as first-line treatment for glaucoma?

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

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.

Question 3: What are the side effects of topical corticosteroid eye drops?

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

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

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

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

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

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

The pressure of the vitreous gel
The tension of the extraocular muscles
Blood pressure in the retinal vessels
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 7: What medications are used to treat allergic conjunctivitis?

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

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

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

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

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

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 10: What is dry eye disease and how is it managed?

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

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 11: 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?

Ciprofloxacin (Correct answer)
Fluorometholone
Erythromycin
Sulfacetamide

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 12: What topical NSAIDs are used in optometric practice?

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

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 13: 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?

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

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

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 15: 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
Prednisolone acetate 0.12%
Cromolyn 4% (Correct answer)
Olopatadine 0.1%

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 16: Which retinal layer contains the photoreceptor cell bodies?

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

Correct answer: Outer nuclear layer

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

Question 17: 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?

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

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 18: What is vertex distance and why does it matter?

The thickness of the lens at its center
The distance between a patient's two eyes
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

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 19: Which pupillary finding is associated with Horner syndrome?

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

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 20: 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?

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

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 21: What is the treatment for herpes simplex keratitis?

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

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

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

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

Branch retinal artery occlusion
Age-related macular degeneration
Diabetic retinopathy
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 24: What is the treatment for bacterial conjunctivitis?

Surgical intervention
Steroid injections
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 25: In testing color vision for optic nerve disease, which test is most sensitive for detecting acquired dyschromatopsia?

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

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

Vitreous hemorrhage
Ischemic optic neuropathy
Central retinal vein occlusion
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 27: 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:

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

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

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

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 29: What is fluorescein staining used for in optometry?

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

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 30: What is the pupillary light reflex?

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

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.

Questions

35 min

Time Limit

70%

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