Recently I spent a week playing a lot
video games on a giant 49 inch HDTV. I never really played video games on the HDTV beforehand. A couple days ago I played almost the whole day, and my eyes got really really tired and really red.
After that day, whenever I'm using a computer or looking at a screen, within 10 minutes of looking, my left eyeball gets hit with a lot of pain. Especially behind the eyeball. So much, that I have to turn away from the computer and get an icepack.