Nägemishäire all mõistetakse nägemissüsteemi komponentide funktsioneerimishäireid ja nendega seotud haigusi, nagu näiteks katarrakt, reetinahaigused, nägemisnärvi haigused ja peaaju haigused.
Women with this disorder tend to have a normal life expectancy with their only symptom being haematuria while men are likely to experience deafness, visual disorders and kidney failure by the age of 50.
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