Hi, this a sort of strange question, my 90 year old uncle said this am when he got up, one eye had normal vision but the other saw blue for about 5 minutes then went back to normal . Later, he said that he seen green for about 5 minutes. Is this something to be concerned about?
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What Causes Blue Colour In Vision?
this is not possible. it appears tobe phychological. may be your uncle is having anxiety neurosis. you can have further examination by ophthalmologist.