CO Neuro-Ophthalmic Disorders & Visual Function Testing 3

Question 1

A 70-year-old presents with sudden painless vision loss in one eye described as a 'curtain coming down.' The most likely diagnosis is:

Accepted Answer

Central retinal artery occlusion

Answer

Sudden, painless, profound unilateral vision loss like a descending curtain is classic for central retinal artery occlusion.

Question 2

The Pulfrich phenomenon is a visual illusion resulting from:

Accepted Answer

Asymmetric optic nerve conduction velocity causing stereoscopic depth illusion

Answer

The Pulfrich phenomenon occurs when asymmetric optic nerve conduction (e.g., from optic neuritis) causes a pendulum to appear to swing in an ellipse.

Question 3

Which pattern of optic disc appearance is expected in a patient with longstanding increased intracranial pressure?

Accepted Answer

Bilateral disc edema (papilledema)

Answer

Papilledema—bilateral optic disc swelling—is the hallmark of raised intracranial pressure transmitted along the optic nerve sheaths.

Question 4

The Humphrey 24-2 visual field test uses a grid of test points separated by:

Accepted Answer

6 degrees

Answer

The Humphrey 24-2 test pattern places test points on a 6-degree grid within the central 24 degrees of the visual field.

Question 5

Foster Kennedy syndrome consists of:

Accepted Answer

Ipsilateral optic atrophy and contralateral papilledema from a frontal mass

Answer

Foster Kennedy syndrome is caused by a frontal lobe or olfactory groove mass that directly compresses the ipsilateral optic nerve (causing atrophy) while raising ICP (causing contralateral papilledema).

(CO) Certified Orthoptist Practice Test

(CO) Certified Orthoptist Practice Test

CO Neuro-Ophthalmic Disorders & Visual Function Testing 3