Ive had a little astigmatism since birth apparently :-/ but no, playing at night, in the dark, for hours, staring at my itouch screen and barely blinking, laying down, has NOT hurt my eyes When i wake up in the morning to play, my eyes get blurry when i go down to make breakfast, but no permanent damage yet; eye doctor on saturday actually. Only problems I get is that long use of itouch repeatedly upside down gets my arms sore lmao, now there all buff ;D haha jk about buff, but yeah, very sore and a good workout