CO Pediatric Vision Development & Screening Flashcards

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

Answer: 5–7 years

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

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

Answer: Preferential looking (Teller Acuity Cards)

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

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

Answer: Ametropic amblyopia

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

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

Answer: The fellow (non-amblyopic) eye

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

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

Answer: Retinoblastoma

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

Photo-screening instruments used in pediatric vision screening primarily detect amblyopia risk factors by analyzing which parameter?

Answer: Corneal light reflex symmetry and retinal reflexes

Photo-screeners analyze corneal light reflexes and the nature of the retinal (red) reflex to detect strabismus, significant refractive error, and media opacities.