Australia I trained as a neonatal paediatrician and developed an interest in developmental disorders in 1988. Parents attending conferences reported that they felt hurt and disempowered by the conduct and language of some teachers and doctors. The particular words of concern were suffering, disability, cripple, mental retardation, blindness, deafness, handicap, client, customer, case and patient. The terminology I will to refer to The Shorter Oxford English Dictionary on historical principles of 19681 for some word examination.
Blindness means is to render insensitive to light or colour.
Also to hide or make difficult to trace - origins are in Middle English. In 1875 the loss of sight in one eye blindness was designated. In a figurative sense it means lacking in intellectual and spiritual sense. You are a case of Usher Syndrome, which means you have the condition of Usher Syndrome. People or children are not cases.