Put the screen in a spot where there is no glare from the windows or lights. Sit at least 50 centimetres from the screen, and position it so that you look downward at it, at an angle of about 20 degrees. When you're working for a steady period, take occasional breaks from the screen and relax your eyes by looking at a distance for a few minutes. Driving On bright or hazy days, wear sunglasses to protect your eyes from glare and harmful ultraviolet rays. If you're on a long trip, stop every few hours to rest your eyes and stretch.
Rest usually alleviates eye strain.
But if you suffer prolonged discomfort or notice a market change in your vision, you should immediately have an eye examination. Studies have shown that permanent damage to the eyes can result from prolonged exposure to the sun without adequate protection. Excessive exposure, especially from light reflected from sand, snow or pavement, can produce a burn on the surface of the eye. Like a sunburn on the skin, eye surface burns are usually painful, but temporary. Of more concern is the cumulative damage of repeated exposure that may contribute to chronic eye disease.