I received my new iPad4 last Friday, and when I look at it for a few minutes, I start feeling nauseus, and start getting a headache. I have been using an iPad2 all the time for a year and half, and an iPhone4 & 5 with no problems. I am guessing it is the larger retina screen that I am having trouble with. I was wondering if anyone else has dealt with this and are there any ways to help my eyes adjust to the retina screen. I have tried lowering the brightness, and have tried looking at it an hour and then recover, look, recover, etc., with no success so far.