AOC Amblyopia Management and Treatment 2

Question 1

Eccentric fixation in amblyopia is defined as:

Accepted Answer

The amblyopic eye habitually fixating with a retinal locus other than the fovea

Answer

Alternating fixation preference between the two eyes during distance viewing

Answer

Inability to maintain steady fixation in either eye under monocular conditions

Answer

Use of peripheral vision by the fellow eye to compensate for the amblyopic eye

Question 2

How does atropine penalization of the fellow eye treat amblyopia in a hyperopic child?

Accepted Answer

It paralyzes accommodation in the fellow eye, blurring near vision and forcing use of the amblyopic eye

Answer

It dilates the pupil of the amblyopic eye to increase retinal illumination

Answer

It directly stimulates visual cortex cells corresponding to the amblyopic eye

Answer

It relaxes the ciliary muscle of the amblyopic eye to sharpen its retinal image

Question 3

Why is deprivation amblyopia generally considered the most severe form?

Accepted Answer

Complete visual deprivation during the sensitive period eliminates patterned input, causing profound vision loss

Answer

It is caused by inherited mutations affecting retinal photoreceptors

Answer

It always involves both eyes simultaneously with equal severity

Answer

It is uniquely resistant to atropine penalization therapy

Question 4

According to PEDIG classification, which best-corrected visual acuity range defines moderate amblyopia?

Accepted Answer

20/50 to 20/80

Answer

20/25 to 20/40

Answer

20/100 to 20/200

Answer

Worse than 20/200

Question 5

PEDIG studies on patching for moderate amblyopia (approximately 20/80) found that prescribing how many hours of daily patching produced outcomes comparable to full-time occlusion?

Accepted Answer

6 hours per day

Answer

1 hour per day

Answer

2 hours per day

Answer

10 hours per day

Question 6

What is the most common cause of deprivation amblyopia in infants?

Accepted Answer

Congenital or infantile cataract obstructing the visual axis

Answer

High bilateral refractive error left uncorrected in the first year

Answer

Large-angle infantile esotropia with dense suppression

Answer

Severe unilateral ptosis without corneal exposure

Question 7

The CAM (Cambridge) vision stimulator was designed to treat amblyopia by:

Accepted Answer

Presenting rotating high-contrast sinusoidal gratings to stimulate cells in the amblyopic eye's visual cortex

Answer

Occluding the fellow eye with a standardized translucent filter during near tasks

Answer

Delivering pulsed-flash photostimulation to activate foveal photoreceptors

Answer

Providing controlled binocular visual input to force cortical fusion cells to fire