CO CO Pediatric Vision Development & Screening

Question 1

The critical period for visual development, during which amblyopia can be most easily induced or treated, extends approximately until what age?

Accepted Answer

5–7 years

Answer

The critical period for visual development typically extends to approximately 7–8 years, though some plasticity persists into the early teens.

Question 2

Which visual acuity testing method is most appropriate for a pre-verbal infant at 6 months of age?

Accepted Answer

Preferential looking (Teller Acuity Cards)

Answer

Preferential looking techniques such as Teller Acuity Cards use an infant's natural preference for patterned stimuli to estimate grating visual acuity.

Question 3

Refractive amblyopia due to high bilateral hyperopia typically leads to which type of amblyopia?

Accepted Answer

Ametropic amblyopia

Answer

Bilateral high hyperopia causes ametropic amblyopia, where both eyes receive chronically blurred images due to uncorrected refractive error without strabismus.

Question 4

Occlusion therapy (patching) for amblyopia in a child is MOST effective when applied to which eye?

Accepted Answer

The fellow (non-amblyopic) eye

Answer

Patching the fellow (better-seeing) eye forces use of the amblyopic eye, stimulating visual cortex development and improving acuity in that eye.

Question 5

A child presents with a white pupillary reflex (leukocoria). Which condition is MOST important to rule out immediately?

Accepted Answer

Retinoblastoma

Answer

Leukocoria is a red flag sign that must prompt urgent evaluation to exclude retinoblastoma, a life-threatening intraocular malignancy in children.

(CO) Certified Orthoptist Practice Test

(CO) Certified Orthoptist Practice Test

CO CO Pediatric Vision Development & Screening