My little sister/MOH is a severe epileptic, and has been for almost four years. Only through a lot of trial and error, tons of medications, and seeing a specialist, has she managed to get herself to the point where she's been seizure-free for four months. It's been a long road.Crux of the issue: she can't be around flashing or blinking lights.We're having an evening wedding, and I've already checked with the church and the reception hall to make sure that the lights in places will be adequate so no flash photography is needed. Speaking to our photographer wasn't an issue either. I'm more worried that guests (mainly my FI's side of the family and friends, who aren't aware) will use flash photography and possibly create a bad situation (at best, flashes of light make her dizzy and sick; at worst, they inflict a grand mal).Choosing a different MOH is out of the question. Is there any way that I can politely word it to my guests (on the invitations or in the program or whatever) that flash photography is just...not okay?

Books read in 2012: 21/50