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NBEO Part II study materials
NBEO Part II study resources

NBEO Part II practice questions

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Question 1Patient History, Chief Complaint, and Risk Factor Assessment

A 58-year-old patient reports a sudden shower of new floaters with a curtain-like shadow in the superior visual field of one eye that began two hours ago. Which historical feature most strongly raises concern for a rhegmatogenous retinal detachment rather than a benign vitreous syneresis?

  1. The acute onset of photopsia combined with a peripheral field defect Correct answer.
  2. Bilateral involvement occurring simultaneously in both eyes
  3. The presence of floaters that have been stable for several years
  4. A history of migraine with visual aura in the same eye

Explanation

Acute photopsia from vitreoretinal traction plus a monocular peripheral field defect (the curtain or shadow) is the classic symptom complex of a retinal tear progressing to rhegmatogenous detachment and warrants urgent dilated funduscopy. Long-standing stable floaters and bilateral simultaneous onset do not fit this pattern.

Question 2Patient History, Chief Complaint, and Risk Factor Assessment

During history taking for a patient with a red, painful eye, which reported factor most increases suspicion for angle-closure glaucoma over conjunctivitis?

  1. Itching that is worse in the spring
  2. A gritty foreign-body sensation relieved by blinking
  3. Watery discharge with morning crusting
  4. Recent onset of halos around lights with nausea and brow pain Correct answer.

Explanation

Halos around lights from corneal edema, nausea and ipsilateral brow or periorbital pain reflect the acute rise in intraocular pressure of angle closure. Discharge, itching and a gritty sensation point toward conjunctival or ocular surface disease instead.

Question 3Patient History, Chief Complaint, and Risk Factor Assessment

Which element of the patient history is the most important risk factor to document before recommending routine annual dilated examinations for diabetic retinopathy?

  1. Family history of open-angle glaucoma
  2. Duration of diabetes and current glycemic control Correct answer.
  3. Occupation involving computer use
  4. Use of over-the-counter artificial tears

Explanation

Duration of diabetes and level of glycemic control are the dominant predictors of retinopathy prevalence and progression, so they drive screening intervals and referral urgency. The other listed factors do not materially change diabetic retinopathy screening recommendations.

Question 4Patient History, Chief Complaint, and Risk Factor Assessment

A patient describes transient monocular vision loss lasting two to ten minutes, described as a curtain descending over one eye, with full recovery. Which historical association is most relevant to pursue next?

  1. Family history of keratoconus
  2. Chronic use of topical beta blockers
  3. History of carotid atherosclerosis or atrial fibrillation Correct answer.
  4. Recent soft contact lens overwear

Explanation

Amaurosis fugax reflects transient retinal ischemia and is strongly associated with embolic sources such as carotid atherosclerotic plaque or cardiac arrhythmia, so vascular risk factors and urgent medical referral are indicated. Contact lens overwear, topical beta blockers and keratoconus do not produce this vascular pattern.

Question 5Patient History, Chief Complaint, and Risk Factor Assessment

A 70-year-old reports gradual, painless central vision loss with distortion of straight lines in one eye over several months. Which historical detail best supports neovascular age-related macular degeneration over dry AMD?

  1. Presence of floaters in the same eye
  2. Slow decline over five years with no distortion
  3. Rapid worsening of metamorphopsia over the past few weeks Correct answer.
  4. Bilateral symmetrical visual acuity loss

Explanation

Neovascular AMD typically produces subacute, rapidly progressive metamorphopsia and central loss from choroidal neovascularization and fluid. Dry AMD tends to progress slowly without distortion, and floaters or symmetric bilateral loss are not distinguishing features.

Question 6Patient History, Chief Complaint, and Risk Factor Assessment

Which historical feature in a patient with episodic headache and visual obscurations most suggests giant cell arteritis requiring same-day evaluation?

  1. Visual aura that precedes headache by 20 minutes
  2. Headache relieved by lying flat
  3. Bilateral eye pain with photophobia in a patient aged 20
  4. Jaw claudication and scalp tenderness in a patient over 60 Correct answer.

Explanation

Jaw claudication, scalp tenderness and age over 50 are classic features of giant cell arteritis, which threatens permanent vision loss from anterior ischemic optic neuropathy and needs urgent evaluation. Young age, migrainous aura and postural headache do not fit this diagnosis.

Question 7Patient History, Chief Complaint, and Risk Factor Assessment

A patient being evaluated for contact lens fitting reports sleeping in lenses several nights per week and swimming while wearing them. Which risk is most directly increased by this history?

  1. Microbial keratitis Correct answer.
  2. Posterior vitreous detachment
  3. Open-angle glaucoma
  4. Pinguecula formation

Explanation

Overnight wear and water exposure are the strongest modifiable risk factors for microbial keratitis in contact lens users because they promote corneal hypoxia and pathogen adherence. Pinguecula, vitreous detachment and glaucoma are unrelated to these behaviors.

Question 8Patient History, Chief Complaint, and Risk Factor Assessment

Which patient-reported symptom pattern most strongly suggests dry eye disease rather than allergic conjunctivitis?

  1. Stringy mucoid discharge with eyelid crusting
  2. Symptoms that worsen through the day and with screen use Correct answer.
  3. Intense itching with seasonal recurrence
  4. Rapid onset of unilateral swelling after exposure to a new cosmetic

Explanation

Dry eye symptoms typically worsen with prolonged visual tasking and later in the day, reflecting tear film instability. Itching with seasonal recurrence, stringy discharge and acute unilateral swelling after exposure are more typical of allergic or contact reactions.

Question 9Patient History, Chief Complaint, and Risk Factor Assessment

A 45-year-old reports a unilateral throbbing headache with ipsilateral ptosis and a small pupil, accompanied by eye pain. Which historical feature most supports Horner syndrome from a carotid dissection over a primary headache?

  1. Photophobia with nausea relieved by dark quiet rooms
  2. Headache triggered by caffeine withdrawal
  3. Recent neck pain or trauma with acute onset Correct answer.
  4. Bilateral tearing with nasal congestion

Explanation

Acute painful Horner syndrome with neck pain or trauma raises concern for internal carotid artery dissection, which requires urgent imaging. Migrainous photophobia, bilateral autonomic symptoms and caffeine withdrawal do not produce an ipsilateral ptosis and miosis combination.

Question 10Patient History, Chief Complaint, and Risk Factor Assessment

Which historical detail is most important when deciding whether a patient with a corneal abrasion needs follow-up for possible retained foreign body?

  1. Family history of corneal dystrophy
  2. Use of preservative-free artificial tears
  3. Mechanism of injury such as grinding or hammering metal Correct answer.
  4. History of seasonal allergies

Explanation

High-velocity mechanisms such as grinding, hammering or drilling can embed a metallic intraocular or intracorneal foreign body, so the injury mechanism determines the need for imaging and careful inspection. The other historical elements do not predict retained foreign material.

Question 11Patient History, Chief Complaint, and Risk Factor Assessment

A patient reports a family history of retinoblastoma in a sibling. Which historical question is most important before recommending genetic counseling?

  1. Whether the patient has ever had conjunctivitis
  2. Whether the patient or any child has had prior eye tumors or enucleation Correct answer.
  3. Whether the patient wears glasses for myopia
  4. Whether the patient uses a computer for work

Explanation

A family history of retinoblastoma raises concern for an inherited RB1 mutation, and personal or offspring history of ocular tumors or enucleation helps determine heritable risk and screening needs. Refractive error, conjunctivitis and occupational screen use do not affect genetic risk.

Question 12Patient History, Chief Complaint, and Risk Factor Assessment

A patient with known Marfan syndrome presents for a routine examination. Which historical finding is most important to elicit given the ocular associations?

  1. Recent onset of floaters only
  2. A history of recurrent styes
  3. Chronic itchy eyelids
  4. Sudden onset of decreased vision or a shadow in the peripheral field Correct answer.

Explanation

Marfan syndrome carries a high risk of ectopia lentis and retinal detachment, so acute visual change or a peripheral field shadow warrants urgent evaluation. Itching, isolated floaters and recurrent styes are not the sentinel ocular events in Marfan syndrome.

Question 13Patient History, Chief Complaint, and Risk Factor Assessment

Which historical feature in a patient reporting flashes of light is most suggestive of visual migraine rather than photopsia from vitreoretinal traction?

  1. A slowly expanding zigzag pattern lasting 15 to 30 minutes in both eyes Correct answer.
  2. Brief flashes in the temporal periphery of one eye provoked by eye movement
  3. Flashes that began suddenly with a shower of floaters
  4. Flashes accompanied by a new temporal field defect

Explanation

Migrainous visual aura is typically binocular, slowly builds as a fortification spectrum and lasts minutes, whereas tractional photopsia is monocular, brief and often provoked by eye movement. A new field defect or simultaneous floaters point toward retinal disease.

Question 14Patient History, Chief Complaint, and Risk Factor Assessment

A 65-year-old reports gradual bilateral ptosis that worsens through the day with diplopia in the evening. Which historical question is most relevant to the leading diagnosis?

  1. Use of topical antihistamines
  2. History of blunt ocular trauma
  3. Family history of color blindness
  4. Difficulty chewing, swallowing or speaking later in the day Correct answer.

Explanation

Fatigable ptosis and diplopia worsening later in the day suggest myasthenia gravis, and bulbar symptoms such as chewing, swallowing or speech difficulty indicate generalized disease requiring medical referral. Trauma, topical antihistamines and color blindness do not explain fatigable ptosis.

Question 15Patient History, Chief Complaint, and Risk Factor Assessment

A patient reports a sudden painless loss of vision in one eye that recovered over 20 minutes and has occurred three times this week. Which risk factor is most important to elicit in the history?

  1. Chronic use of contact lenses
  2. Atrial fibrillation or prior stroke Correct answer.
  3. Family history of retinitis pigmentosa
  4. Recent upper respiratory infection

Explanation

Recurrent transient monocular visual loss suggests embolic transient ischemic attacks, so a cardiac arrhythmia or prior cerebrovascular event is the key risk factor to identify for urgent referral. Contact lens use, retinitis pigmentosa and recent respiratory infection do not cause this pattern.

Question 16Patient History, Chief Complaint, and Risk Factor Assessment

Which historical detail best distinguishes a patient with functional (non-organic) visual loss from one with genuine visual pathway disease?

  1. Presence of a relative afferent pupillary defect
  2. Color desaturation in the affected eye
  3. Visual behavior that is inconsistent with the reported acuity, such as navigating easily or reading despite profound loss Correct answer.
  4. Progressive loss of peripheral field over years

Explanation

Functional visual loss is suggested by inconsistency between reported acuity and observed behavior, or by non-physiologic field testing, with normal pupillary responses and no structural findings. Progressive field loss, an afferent pupillary defect and color desaturation indicate organic pathway disease.

Question 17Patient History, Chief Complaint, and Risk Factor Assessment

A patient with a known diagnosis of uveitis reports a new onset of floaters and decreased vision. Which historical element most helps determine whether the inflammation is infectious rather than autoimmune?

  1. History of seasonal hay fever
  2. Travel history, immunosuppression and exposure to tuberculosis or ticks Correct answer.
  3. Use of reading glasses
  4. Family history of cataract

Explanation

Infectious uveitis risk is assessed through travel, immunosuppression and exposures such as tuberculosis or tick-borne disease, which guide targeted testing before immunosuppressive therapy. Refractive correction, cataract family history and hay fever do not distinguish infectious from immune-mediated uveitis.

Question 18Patient History, Chief Complaint, and Risk Factor Assessment

A patient reports a long-standing history of poor night vision and progressive peripheral field loss beginning in adolescence, with a similarly affected sibling. Which historical feature most supports a hereditary retinal dystrophy?

  1. Unilateral involvement only
  2. Consanguinity and affected siblings with the same onset pattern Correct answer.
  3. Improvement with corticosteroid use
  4. Sudden onset after a febrile illness

Explanation

Consanguinity and similarly affected siblings with an adolescent onset of nyctalopia and peripheral field loss support an inherited retinal dystrophy such as retinitis pigmentosa. Acute post-febrile onset, strict unilaterality and steroid responsiveness point to inflammatory or other acquired causes instead.

Question 19Patient History, Chief Complaint, and Risk Factor Assessment

A patient being screened for glaucoma reports that a sibling was blinded by glaucoma in his 50s. What is the most appropriate interpretation of this history?

  1. Family history matters only for angle-closure disease
  2. A first-degree relative with glaucoma substantially increases risk and supports earlier, more frequent comprehensive evaluation Correct answer.
  3. Family history has no role when intraocular pressure is normal
  4. Family history is relevant only if both parents are affected

Explanation

A first-degree relative with glaucoma, especially with severe disease, is a major risk factor that justifies earlier and more frequent evaluation, including optic nerve assessment regardless of intraocular pressure. Glaucoma can occur at normal pressure, and the risk is not limited to angle closure or to bilineal inheritance.

Question 20Patient History, Chief Complaint, and Risk Factor Assessment

A patient reports eye pain that awakens them from sleep and is associated with a foreign-body sensation and mild photophobia. Which historical feature most suggests recurrent corneal erosion?

  1. A gradual painless decrease in vision over years
  2. Pain that is maximal in the late afternoon
  3. Bilateral itching worse in spring
  4. A prior corneal abrasion or injury, with symptoms worst on waking Correct answer.

Explanation

Recurrent corneal erosion classically follows a prior abrasion or epithelial injury and produces sharp pain and foreign-body sensation on awakening as the eyelid strips poorly adherent epithelium. Seasonal itching, late-afternoon pain and painless gradual visual decline do not fit this pattern.

Question 21Refraction, Binocular Vision, and Accommodation

A 24-year-old patient reports intermittent horizontal diplopia at distance that resolves when one eye is covered. Which binocular vision finding is most consistent with this report?

  1. An intermittent exotropia or divergence insufficiency at distance Correct answer.
  2. Constant suppression of the non-dominant eye at distance
  3. An accommodative excess producing blurred distance vision
  4. A monocular uncorrected refractive error in the dominant eye

Explanation

Diplopia that disappears with occlusion confirms a binocular (non-monocular) cause, so the deviation must be present intermittently at distance. Intermittent exotropia and divergence insufficiency both produce distance horizontal diplopia that clears when fusion is disrupted by covering one eye.

Question 22Refraction, Binocular Vision, and Accommodation

During cover testing, a patient's uncovered eye moves outward to take up fixation when the fellow eye is covered. This movement indicates which deviation?

  1. Cyclophoria
  2. Esophoria
  3. Hyperphoria
  4. Exophoria Correct answer.

Explanation

When the fixating eye is covered, a latent deviation becomes manifest and the uncovered eye must move to re-establish fixation. Outward movement of that eye indicates an exodeviation, so the finding is an exophoria.

Question 23Refraction, Binocular Vision, and Accommodation

A patient with a high hyperopic refractive error who has never worn correction reports blurred near vision and asthenopia. Which mechanism best explains the symptoms?

  1. Chronic accommodative demand that exceeds the patient's accommodative reserve Correct answer.
  2. Primary convergence insufficiency unrelated to refractive error
  3. Excessive accommodative convergence causing a near esotropia
  4. Reduced convergence demand from the high hyperopia

Explanation

Uncorrected hyperopes must accommodate even for distance, leaving little reserve for near tasks. The sustained accommodative load produces asthenopia and near blur when demand exceeds the available amplitude.

Question 24Refraction, Binocular Vision, and Accommodation

Which test directly measures the amplitude of accommodation by determining the closest point at which a target remains clear with one eye?

  1. Negative relative accommodation testing
  2. Fusional vergence amplitude testing
  3. Push-up accommodative amplitude testing Correct answer.
  4. Stereopsis testing with polarized vectographs

Explanation

Push-up testing moves a near target toward the patient until sustained blur is reported, giving the near point of accommodation. The reciprocal of that distance in meters yields the amplitude in diopters.

Question 25Refraction, Binocular Vision, and Accommodation

A 10-year-old reads at 33 cm and has a push-up amplitude of 6.00 D. Using Hofstetter's minimum expected amplitude formula (15 minus one-quarter of age), how does this compare with the expected minimum?

  1. It is above the expected minimum, which is about 12.50 D
  2. It is below the expected minimum, which is about 12.50 D Correct answer.
  3. It is below the expected minimum, which is about 8.50 D
  4. It is above the expected minimum, which is about 8.50 D

Explanation

Hofstetter's minimum amplitude is 15 minus one-quarter of age, which for age 10 is 15 minus 2.5, or 12.50 D. A measured amplitude of 6.00 D is well below that expected minimum, indicating an accommodative insufficiency.

Question 26Refraction, Binocular Vision, and Accommodation

A patient has a distance esophoria of 2 prism diopters and a near esophoria of 10 prism diopters at 40 cm. Which calculation gives the accommodative convergence to accommodation (AC/A) ratio by the gradient method using a -1.00 D add?

  1. About 8 prism diopters per diopter Correct answer.
  2. About 4 prism diopters per diopter
  3. About 2 prism diopters per diopter
  4. About 10 prism diopters per diopter

Explanation

The gradient AC/A equals the change in deviation divided by the change in accommodative stimulus. A -1.00 D add reduces accommodation by 1 D; if the near esophoria falls from 10 to about 2 prism diopters, the change of 8 prism diopters per 1 D gives an AC/A of about 8.

Question 27Refraction, Binocular Vision, and Accommodation

A patient shows orthophoria at distance and a 12 prism diopter exophoria at near, with a reduced near point of convergence and normal distance vergence ranges. Which diagnosis is most consistent?

  1. Basic esophoria
  2. Divergence excess
  3. Convergence insufficiency Correct answer.
  4. Accommodative infacility

Explanation

A significantly larger near exodeviation with a receded near point of convergence and normal distance findings is the classic profile of convergence insufficiency. Divergence excess would show the larger deviation at distance.

Question 28Refraction, Binocular Vision, and Accommodation

A patient wearing a +2.00 D add for near work has a near esophoria that increases compared with single-vision wear. Which effect of the add explains this change?

  1. The add increases accommodative demand, raising accommodative convergence
  2. The add directly increases fusional convergence reserves
  3. The add reduces accommodative demand, lowering accommodative convergence Correct answer.
  4. The add reduces the near working distance

Explanation

A plus add relaxes accommodation for a given near target, which reduces the accommodative convergence linked to that accommodation. For an esophore, this reduction in convergence demand typically reduces the near esophoria rather than increasing it; the option stating that the add lowers accommodative convergence is the correct mechanism.

Question 29Refraction, Binocular Vision, and Accommodation

A 45-year-old emmetrope has a push-up amplitude of 4.00 D and a comfortable near working distance of 40 cm. Which management is most appropriate?

  1. Begin vision therapy to increase accommodative amplitude
  2. Prescribe a myopic distance correction
  3. Prescribe a near add to reduce accommodative demand at the working distance Correct answer.
  4. Prescribe base-in prism for distance viewing only

Explanation

At 40 cm the accommodative demand is 2.50 D, which consumes more than half of a 4.00 D amplitude and leaves inadequate reserve. A near add reduces the demand and restores comfortable sustained near vision.

Question 30Refraction, Binocular Vision, and Accommodation

A patient's near phoria measures 6 prism diopters esophoria with the Maddox rod and 4 prism diopters esophoria with von Graefe. Which statement best describes this discrepancy?

  1. The two methods measure different entities and cannot be compared
  2. The von Graefe result should always be discarded
  3. Dissociation differences between methods can produce small phoria discrepancies Correct answer.
  4. Maddox rod is invalid for measuring horizontal phorias

Explanation

Different phoria methods dissociate the eyes to different degrees, and the Maddox rod typically produces greater dissociation than von Graefe. Small discrepancies between methods are therefore expected and do not invalidate either test.

Question 31Refraction, Binocular Vision, and Accommodation

A patient reports intermittent blurred distance vision and headaches after prolonged near work, with normal refraction and a high near esophoria. Which binocular condition best fits this presentation?

  1. Accommodative excess
  2. Convergence excess Correct answer.
  3. Divergence insufficiency
  4. Basic exophoria

Explanation

A high near esophoria with distance symptoms after sustained near tasks is characteristic of convergence excess. The excessive convergence response at near creates asthenopia and intermittent distance blur.

Question 32Refraction, Binocular Vision, and Accommodation

A patient has a near point of convergence of 15 cm and reports diplopia when reading at 33 cm. Which interpretation is most accurate?

  1. The near point of convergence is receded and may contribute to near diplopia Correct answer.
  2. The near point of convergence is normal and symptoms are unrelated
  3. The finding indicates divergence excess
  4. The finding confirms an accommodative excess

Explanation

A near point of convergence beyond roughly 10 cm is considered receded. A receded near point with near diplopia suggests inadequate convergence, consistent with convergence insufficiency contributing to symptoms.

Question 33Refraction, Binocular Vision, and Accommodation

A patient has a +1.00 D spherical blur on the duochrome test at distance, with the red side clearer. Which refractive adjustment is indicated?

  1. Add more minus power Correct answer.
  2. Add cylinder axis at 90 degrees
  3. Add more plus power
  4. No change is needed

Explanation

When the red side is clearer on duochrome testing at distance, the patient is relatively over-plussed, so additional minus power is indicated. The red focus lies behind the green, and more minus moves the image forward to balance the two.

Question 34Refraction, Binocular Vision, and Accommodation

A patient with anisometropia of 3.00 D reports asthenopia and unequal image sizes with spectacles. Which option best addresses the aniseikonia?

  1. Prescribe base-out prism in both lenses
  2. Increase the vertex distance of the more myopic lens
  3. Reduce center thickness of both lenses
  4. Contact lens wear to minimize aniseikonia Correct answer.

Explanation

Aniseikonia from spectacle magnification differences is reduced when refractive correction is placed closer to the eye. Contact lenses minimize the vertex distance contribution to magnification difference and are a standard option for spectacle-induced aniseikonia.

Question 35Refraction, Binocular Vision, and Accommodation

A patient's accommodative facility at near is 2 cycles per minute with -2.00/+2.00 flippers, and the patient reports difficulty clearing the minus lens. Which interpretation is most likely?

  1. Excessive facility indicating accommodative excess
  2. Normal facility with no accommodative problem
  3. Result consistent with convergence excess
  4. Reduced facility suggesting accommodative infacility or insufficiency Correct answer.

Explanation

Normal monocular accommodative facility is generally around 8 to 12 cycles per minute, so 2 cycles per minute is markedly reduced. Difficulty clearing the minus lens indicates a problem stimulating accommodation, consistent with infacility or insufficiency.

Question 36Refraction, Binocular Vision, and Accommodation

A patient with a large exophoria at distance and near is found to have a high AC/A ratio. Which management consideration is most relevant?

  1. A high AC/A suggests a minus add will reduce the deviation at near
  2. A high AC/A suggests a plus add will reduce the deviation at near Correct answer.
  3. A high AC/A indicates an accommodative insufficiency
  4. A high AC/A requires base-out prism at distance

Explanation

A high AC/A means accommodative convergence changes markedly with accommodative demand. A plus add relaxes accommodation and reduces convergence, which can help control a deviation that increases with near demand.

Question 37Refraction, Binocular Vision, and Accommodation

A patient with a near esotropia of 20 prism diopters and a distance esotropia of 5 prism diopters is evaluated for a near add. Which finding would most support a high AC/A ratio?

  1. A reduction in distance esotropia with a minus add
  2. No change in near esotropia with a plus add
  3. A large increase in near esotropia with a plus add
  4. A large reduction in near esotropia with a plus add Correct answer.

Explanation

A plus add reduces accommodative demand and therefore accommodative convergence. A large decrease in the near esotropia with the add indicates that the near deviation is strongly accommodation-dependent, supporting a high AC/A ratio.

Question 38Refraction, Binocular Vision, and Accommodation

A patient has a distance esophoria of 4 prism diopters and a near esophoria of 4 prism diopters with a normal AC/A. Which classification best describes the deviation?

  1. Divergence insufficiency
  2. Divergence excess
  3. Convergence excess
  4. Basic esophoria Correct answer.

Explanation

A basic esophoria shows a similar esodeviation at distance and near, with an AC/A ratio near the expected range. The equal distance and near findings distinguish it from convergence excess and divergence insufficiency.

Question 39Refraction, Binocular Vision, and Accommodation

A patient with intermittent exotropia reports that the deviation is most noticeable when fatigued and that they can often control it. Which finding would best support a diagnosis of true divergence excess?

  1. Near exodeviation greater than distance exodeviation
  2. Distance esophoria with near exophoria
  3. Distance exodeviation greater than near exodeviation that persists after prolonged near fixation Correct answer.
  4. Equal distance and near exodeviations

Explanation

True divergence excess shows a larger distance than near exodeviation even after prolonged near fixation, which controls for the effect of proximal convergence. If the near deviation increases after sustained near fixation, a simulated divergence excess is more likely.

Question 40Refraction, Binocular Vision, and Accommodation

A practitioner performs retinoscopy on a patient and finds a with-motion reflex in all meridians at 50 cm working distance. Which spherical result is indicated if no compensation for working distance is applied?

  1. +2.00 D Correct answer.
  2. +0.50 D
  3. Plano
  4. -2.00 D

Explanation

With-motion at a 50 cm working distance indicates the patient is relatively hyperopic by the working distance, which is 2.00 D. Without subtracting the working distance, the neutralization value is about +2.00 D.

Question 41Anterior Segment and Adnexal Disease

A 6-year-old child is brought in with a 2-day history of a tender, red, swollen eyelid. On palpation there is a discrete, localized, tender nodule at the eyelid margin pointing toward the lash line. What is the most likely diagnosis?

  1. Hordeolum internum
  2. Hordeolum externum Correct answer.
  3. Chalazion
  4. Blepharitis marginalis

Explanation

An acute, tender, localized eyelid nodule that points toward the lash margin reflects infection of an eyelash follicle or its associated Zeis or Moll gland, which is an external hordeolum. A chalazion is a non-tender lipogranuloma of a meibomian gland, and internal hordeolum involves the meibomian gland with pain but points toward the conjunctival surface. The tenderness and lash-line pointing localize the lesion.

Question 42Anterior Segment and Adnexal Disease

Which organism is most commonly responsible for an acute hordeolum in a healthy adult?

  1. Staphylococcus aureus Correct answer.
  2. Pseudomonas aeruginosa
  3. Herpes simplex virus type 1
  4. Neisseria gonorrhoeae

Explanation

Staphylococcus aureus is the classic pathogen for acute hordeolum because it colonizes the eyelid margin and infects follicles and glands. Pseudomonas is more associated with contact lens–related keratitis, gonococcus with hyperacute conjunctivitis, and HSV with vesicular lid disease. Recognizing the typical pathogen guides appropriate warm-compress and topical antibiotic management.

Question 43Anterior Segment and Adnexal Disease

A patient with a chalazion that has failed 6 weeks of warm compresses and lid hygiene is being counseled. Which initial interventional option is most appropriate?

  1. Systemic oral acyclovir
  2. Observation for an additional 3 months
  3. Topical corticosteroid drops alone
  4. Intralesional triamcinolone injection or incision and curettage Correct answer.

Explanation

A chalazion persisting beyond several weeks despite conservative therapy is managed with intralesional corticosteroid injection or incision and curettage. Antiviral therapy is irrelevant because a chalazion is a lipogranulomatous inflammatory lesion, not a viral infection. Topical drops alone do not penetrate the tarsal lesion adequately, and prolonged observation risks recurrent inflammation and possible lid deformity.

Question 44Anterior Segment and Adnexal Disease

A 68-year-old with a long-standing chalazion of the upper eyelid has a painless, firm, ulcerated lesion with loss of lashes after recent incomplete excision. Which diagnosis must be excluded?

  1. Sebaceous gland carcinoma Correct answer.
  2. Syringoma
  3. Squamous papilloma
  4. Basal cell carcinoma

Explanation

A recurrent or nonhealing lid lesion that mimics a chalazion, especially with lash loss and ulceration in an older adult, raises concern for sebaceous gland carcinoma, which has a notorious chalazion-like presentation. Basal cell carcinoma is the most common lid malignancy but usually occurs at the lower lid margin with pearly telangiectatic features. Any recurrent chalazion should therefore be biopsied.

Question 45Anterior Segment and Adnexal Disease

Which finding on the eyelid margin is most characteristic of anterior blepharitis due to staphylococcal colonization?

  1. Fine subepithelial corneal scarring in a whorl pattern
  2. A single large non-tender chalazion
  3. Diffuse meibomian gland dropout on meibography
  4. Hardened cylindrical collarettes around the lash bases Correct answer.

Explanation

Staphylococcal anterior blepharitis classically produces hard, cylindrical collarettes that encircle the lash base. Meibomian gland dropout reflects posterior blepharitis, whorl keratopathy reflects Fabry disease or drug toxicity, and a chalazion is a separate meibomian lesion. Identifying collarettes helps distinguish anterior from posterior lid margin disease.

Question 46Anterior Segment and Adnexal Disease

A newborn has a 1-cm fluctuant red swelling over the medial canthus with erythema of the surrounding skin and mild fever. Which management is most appropriate?

  1. Warm compresses and outpatient oral antibiotics
  2. Incision and curettage of the lesion
  3. Observation with reassurance only
  4. Urgent systemic intravenous antibiotics with possible surgical drainage Correct answer.

Explanation

A dacryocystocele with overlying cellulitis and systemic signs in a neonate is a serious infection requiring prompt intravenous antibiotics and possible drainage. Simple outpatient oral therapy and observation risk orbital extension or sepsis in this age group. Incision and curettage is inappropriate for an infected lacrimal sac lesion.

Question 47Anterior Segment and Adnexal Disease

A 55-year-old presents with a painful, swollen, red lacrimal sac region, epiphora, and purulent discharge from the punctum on pressure. The overlying skin is erythematous and tense. What is the most likely diagnosis?

  1. Dacryocystitis Correct answer.
  2. Canaliculitis
  3. Preseptal cellulitis alone
  4. Dacryoadenitis

Explanation

Pain, swelling over the lacrimal sac, epiphora, and reflux of purulent material from the punctum are the hallmark of dacryocystitis. Canaliculitis affects the canaliculus with a pouting punctum and sulfur granules, dacryoadenitis involves the lacrimal gland superotemporally, and isolated preseptal cellulitis lacks punctal reflux. Localizing the swelling to the sac below the medial canthal tendon confirms the diagnosis.

Question 48Anterior Segment and Adnexal Disease

A 60-year-old with recurrent dacryocystitis and a soft, fluctuant medial canthal mass that enlarges with Valsalva maneuver is evaluated. Which underlying condition best explains the findings?

  1. Lacrimal sac mucocele with nasolacrimal duct obstruction Correct answer.
  2. Lacrimal gland pleomorphic adenoma
  3. Canalicular laceration
  4. Punctal stenosis

Explanation

A distended lacrimal sac that enlarges with Valsalva maneuver after nasolacrimal duct obstruction is a mucocele, which predisposes to recurrent dacryocystitis. Pleomorphic adenoma involves the lacrimal gland, punctal stenosis affects the punctum only, and canalicular laceration follows trauma. The Valsalva-dependent enlargement reflects communication of the sac with the nasal cavity through an obstructed duct.

Question 49Anterior Segment and Adnexal Disease

A 72-year-old with chronic epiphora has a soft, painless, reducible swelling at the medial canthus that appears when crying. Syringing shows irrigation passing to the nose. Which diagnosis is most consistent?

  1. Canaliculitis
  2. Dacryocystocele
  3. Nasolacrimal duct obstruction
  4. Lacrimal sac diverticulum Correct answer.

Explanation

A reducible medial canthal swelling with a patent nasolacrimal system on syringing suggests a lacrimal sac diverticulum, which fills with tears and collapses on pressure. Complete nasolacrimal duct obstruction would block irrigation from reaching the nose. Canaliculitis produces punctal discharge, and dacryocystocele typically presents in infancy with obstruction.

Question 50Anterior Segment and Adnexal Disease

Which clinical finding most strongly distinguishes orbital cellulitis from preseptal cellulitis?

  1. Erythema and edema of the eyelids
  2. Proptosis, restricted extraocular motility, or pain with eye movement Correct answer.
  3. Low-grade fever
  4. Conjunctival injection

Explanation

Orbital cellulitis involves structures posterior to the orbital septum, producing proptosis, ophthalmoplegia, and pain on eye movement. Preseptal cellulitis is confined anterior to the septum and typically spares motility and globe position. Both conditions share lid erythema, injection, and fever, so these do not separate them.