Eye Breaks: Looking at a computer screen for a while causes some changes in how
the eyes work, causes you to blink less often, and exposes more of the eye surface to the air.
Every 15 minutes you should briefly look away from the screen for a minute or two to a more distant
scene, preferably something more that 20 feet away. This lets the muscles inside the eye relax.
Also, blink your eyes rapidly for a few seconds. This
refreshes the tear film and clears dust form the eye surface.