Complex visual hallucinations in partial blindness due to eye disease.

Three patients experienced complex formed hallucinations during progressive visual failure from eye disease. The hallucinations began abruptly, were brightly coloured stereotyped figures, animals or objects, and appeared to be provoked by light. As blindness progressed the clarity, frequency and duration of the hallucinations faded. The patients had no abnormalities other than their eye disease, which in two cases was macula degeneration, and choroideraemia in the third.