Visual disability in children.
D000293:Adolescent; D001766:Blindness / Q000209:etiology; D002648:Child; D002675:Child, Preschool; D005260:Female; D006801:Humans; D007484:Iowa; D008297:Male; D014786:Vision Disorders / Q000151:congenital / Q000175:diagnosis* / Q000209:etiology