Colour vision in the legally blind.
D000328:Adult; D001766:Blindness / Q000175:diagnosis / Q000209:etiology; D003118:Color Perception; D003119:Color Perception Tests; D003117:Color Vision Defects / Q000175:diagnosis*; D004185:Disability Evaluation; D005128:Eye Diseases / Q000150:complications; D006801:Humans; D008297:Male; D008722:Methods; D008875:Middle Aged; D014792:Visual Acuity; D014794:Visual Fields