NBEO NBEO Posterior Segment & Retinal Disease 1 — Questions and Answers
Question 1: Which retinal layer contains the photoreceptor cell bodies?
- Outer nuclear layer (Correct answer)
- Inner nuclear layer
- Ganglion cell layer
- Retinal pigment epithelium
Correct answer: Outer nuclear layer
The outer nuclear layer contains the nuclei and cell bodies of both rod and cone photoreceptors.
Question 2: 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
- Vitreous hemorrhage
- Posterior vitreous detachment
Correct answer: Rhegmatogenous retinal detachment
Rhegmatogenous retinal detachment classically presents with photopsia, floaters, and a scotoma described as a curtain moving across vision.
Question 3: Which finding on fundus examination is MOST characteristic of nonproliferative diabetic retinopathy (NPDR)?
- Microaneurysms (Correct answer)
- Neovascularization of the disc
- Vitreous hemorrhage
- Fibrovascular proliferation
Correct answer: Microaneurysms
Microaneurysms are the earliest and most characteristic sign of NPDR, representing focal outpouchings of retinal capillary walls.
Question 4: A flame-shaped hemorrhage in the nerve fiber layer is most commonly associated with which condition?
- Hypertensive retinopathy (Correct answer)
- Branch retinal artery occlusion
- Diabetic retinopathy
- Age-related macular degeneration
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 5: Which test is considered the gold standard for diagnosing choroidal neovascularization (CNV) in wet AMD?
- Fluorescein angiography (Correct answer)
- Optical coherence tomography
- Fundus autofluorescence
- 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 6: 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)
- The entire posterior pole
- Only the peripapillary area
- 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.
NBEO NBEO Posterior Segment & Retinal Disease 1
Which retinal layer contains the photoreceptor cell bodies?