Blurry Monitor

Over the last weekend I noticed my monitor stared getting blurry... At first I thought it was my eye's... But everything else appeared clear. So I turned my computer and monitor off for a while. When I turned it back on the monitor seemed clear again. Then... after about 15 minutes, it got blurry like before. I have no idea why this is happening. It would be nice to get some advice because this is hurting my eye's and it's hard to get work done like this.

-thx...

did you try a degauss?

Yeah, didn't work when i did it though...
But it's fine now, I just left it off for a few days and it seems to be fine now.

Perhaps it's a vga (D-Sub) cable/plug problem if you're not using DVI