Functional classification system of visually impaired to replace the legal definition of blindness.
D001766:Blindness / Q000145:classification* / Q000534:rehabilitation; D005139:Eyeglasses; D006801:Humans; D007089:Image Enhancement; D007883:Legislation, Medical; D009068:Movement; D055095:Optics and Photonics / Q000295:instrumentation; D011632:Public Assistance; D011932:Reading; D014481:United States; D014786:Vision Disorders / Q000145:classification; D014792:Visual Acuity; D014956:Writing