Why do I see colored lines on screens?

Question

Like, at school most of my classes are computer classes, and the teachers use these big screens on the wall to help teach..so im always looking at screens. If i'm looking at them long enough, I start seeing these blocks of multicolored lines. Nobody else can see them but me.

Am I going blind or something? Or is it just some kind of weird reflection or reaction or something with my contacts and the screens? I have really really bad eyesight by the way...like, they don't even make disposable contacts for my prescription, that's how bad they are.

Answer 1

This is your lens acting as a sort of reverse prism. What's happening is as the white light is refracted through your lenses and into your retina, it naturally splits up (diverges) into its different frequencies (starting at the lowest frequency - red to the highest - violet). I'd be more worried if this was happening to you without glasses! I'm sorry for your situation with them not making quality glasses,  I know it sucks. BTW This is coming from a 16 year old guy, so hey maybe you should see an epidemiologist or some other kind of eye specialist.