I havent done this for years, did it once almost 10 years ago and took all day to get vision right again. but anyway, I have been told I should do it again to make sure the slightly blurry vision I often have isnt anything serious but I have put it off. and I read at one forum that one guy had a bad chemical reaction to the dilating chemical they use he got like manic.....what is up with that? since I am chemically sensitive now I am concernd I could get a psycho-active reaction from dilation. Does anyone know much about this?