Display has gone X-ray

My cat was doing some typing on my computer, and then she laid on the keyboard for a while. We were watching a DVD. Then all of a sudden, everything turned x-ray. Every application is in this color. I've restarted, and gone into safe mode, and everything is fine, but when I restart, its back. Any ideas on this one??? Really annoying, and I can't do my work. Anybody, help a bro out. Muchos gracias.