Impaired vision and blindness are ... from contrast sensitivity. Visual acuity is tested by reading black letters against a white background (Snellen chart) in indoor conditions with bright ...

Collard has oculocutaneous albinism, which means that her hair is naturally bleach white, her complexion maximally fair, and she has uncorrectably low visual acuity with limited depth perception.

Errors of refraction and strabismic amblyopia were the most common causes of low ... visual acuity of 20/70 or worse (average BCVA for worse eye, 20/174), with 25.9% having bilateral vision ...

LOUISVILLE, Ky (WDRB) -- February is low vision awareness month. WDRB's Keith Kaiser found a clinic helping people with visual impairments. The Kentucky Lions Eye Foundation (KLEF) Low Vision ...