In short - use eyes in as wide range as possible. If working with screens a lot, I first make sure they are properly balanced (brightness/contrast/color) for t

In short - use eyes in as wide range as possible. If working with screens a lot, I first make sure they are properly balanced (brightness/contrast/color) for the ambient light, so eyes don't receive too much energy off the screen. Then distance it, preferrably farther than arm length, with something visible behind the monitor (not just a wall of screen). This way I can direct eyes farther away to relax. Also good quality sleep, which at times is very much a non-trivial task. Ah, the most critical, and both hardest and easiest task - taking breaks to give eyes and mind some rest. Advice that all parents give to kids, yet often fail to follow themselves...