Definitions for "Legal Blindness"
Keywords:  acuity, widest, worse, subtends, vision
In the U.S., (1) Visual acuity of 20/200 or worse in the better eye with corrective lenses. (2) Visual field restricted to 20 degrees diameter or less (tunnel vision) in the better eye. Note these criteria are used to determine eligibility for government disability benefits and do not necessarily indicate a person's ability to function.
Best-corrected visual acuity of 20/200 or worse, or reduction in visual field to 20 degrees or less, in the better-seeing eye.
blindness as recognized by law which in most states of the U.S. means that the better eye using the best possible methods of correction has a visual acuity of 20/200 or worse or that the visual field is restricted to 20 degrees or less