I got an ipad a while ago and have noticed if I use it for more than 20 minutes I get a headache and am pretty nauseaus. (FYI - I don't experience this with any other devices and I am in a well lit room)In reading posts on the apple site, it seems like a rare phenomenon. I am wondering if it is an ASD/aspie thing. Does anyone else experience headaches, dizziness, nauseau, etc. after using an ipad or iphone?