Handling Eye-Strain?

mathgenius asks: "Usually I have no problems with this, but I've noticed again, as the stress levels increase I become more susceptible to eye-strain. I've reduced the contrast on my monitor, changed Mozilla to grey background, and enlarged my text. I am considering moving my desk to the window next, so that I am more likely to relax looking at a distance. Do people here have these problems? What have you found to help with eye-strain?"