title: A study of congenital blindness in British Columbia: methodology and medical findings.
mesh_terms: D001766:Blindness / Q000151:congenital* / Q000453:epidemiology / Q000209:etiology; D001955:British Columbia; D002648:Child; D006233:Persons with Disabilities; D004812:Epidemiologic Methods; D005128:Eye Diseases / Q000145:classification; D006801:Humans; D014785:Vision, Ocular