One of my sisters, who were twins born prematurely, has macular degeneration from too much oxygen in the hospital where they were kept for 3 months before they could come home as newborns. I know she's had some kind of surgery a couple of times to help with it. They and my other sister have worn contacts since the 1960's. From what I remember, they wear the same kind as always which were the small, hard ones. I will ask them, though, if they are the perforated/gas permeable type, though, to make sure this is not a problem compounding her other problem. I had no idea this could happen with contacts. Thanks for letting us know and good luck...makes me glad I've always gone for glasses.:-)