You're still using a CRT?If your CRT isn't capable of refresh rates at least above 76hz, then you should replace it.LCD doesn't have that same refresh problem, so there won't be any flickering. It's mainly this flickering that causes eyestrain.LCD also has a much brighter, crisper picture when sitting close, and isn't nearly as susceptible to glare because the outer screen of a LCD isn't made from glass, like CRT is.If your eyes are still giving you problems and you wear glasses, many eyeglass places can make glasses that use a special coating that is supposed to help reduce eyestrain when using a computer. Otherwise, every 15 minutes, you should look away from the screen and try focusing on an object that's far away (further than your arm's length at least) for a few seconds. This will help exercise your eye muscles and keep them from getting tired from just focusing at one length for so long.