Central Government Act
Section 2(1)(o) in The Rehabilitation Council Of India Act, 1992
(o) " visually handicapped" means a person who suffers from any of the following conditions, namely:--
total absence of sight;
visual acquity not exceeding 6 60 or 20 200 (snellen) in the better eye with the correcting lenses; or
limitation of the field of vision subtending and angle of degree or worse.