Ok, so I need this to be cleared up. I've been using 40 contrast/brightness on a CTR monitor. I used to have it to something really bright and my eyes would start to hurt after a while, when I toned it down (a lot) it really helped. But, if you went outside, it's really bright theres a lot more photons hitting your eyes. But I also thought about like some spot where there's a lot light then everywhere else is a lot darker. Do monitors ruin eyesight?