Vision Therapy and Rehabilitation Flashcards

Low vision rehabilitation is indicated when a patient's best-corrected visual acuity is:

Answer: 20/70 or worse in the better eye with reduced functional ability

Low vision rehabilitation is appropriate for patients with best-corrected VA of 20/70 or worse that limits daily functioning and cannot be further improved by optical correction or treatment.

Vergence therapy typically uses which primary instrument to improve fusional vergence ranges?

Answer: Prism bar or Brock string

Prism bars and the Brock string are foundational tools for training vergence demand and improving the amplitude and facility of fusional vergence responses.

Binasal occlusion in prism glasses is used to treat which binocular vision condition?

Answer: Exophoria with convergence insufficiency

Binasal occlusion reduces peripheral fusion disruption and enhances accommodative convergence in patients with exophoric tendencies and convergence insufficiency.

The critical period for amblyopia treatment is generally considered to close around:

Answer: 7–9 years of age

The visual cortex retains neuroplasticity for amblyopia treatment most effectively up to age 7–9, though some response is possible into adolescence with intensive treatment.

Eccentric viewing training in low vision rehabilitation teaches a patient to:

Answer: Use a preferred retinal locus outside the damaged macula

Eccentric viewing trains patients with central scotomas to consistently fixate using a healthy para-central preferred retinal locus (PRL) to maximize functional vision.

Which test specifically measures stereoacuity and is commonly used in vision therapy assessment?

Answer: Randot stereotest

The Randot stereotest uses polarized vectographic targets to measure global and local stereopsis in arc seconds, quantifying binocular depth perception.