Prevention: Proper posture, screen 10 degree lower than eye level and tilted backwards. After every 20 mins. look at distance of 20 ft. beyond and blink 20 times (20-20-20). Wet your eyes frequesntly. Palming of eyes and rotation exercise will help. Accomodation exercise - look at pen tit at distance of 30 cms. from nose and then beyond 50 ft. Moisturising eye drops i.e. Refresh tears may help. more