Using computers for extended periods can cause visual discomfort, headaches and vision challenges. It is very unlikely that you will suffer permanent changes or damage to your eyes. Dry and irritated eyes occur when there is insufficient fluid in the eyes to keep them moist. Eyes are kept moist and refreshed by a normal blink reflex which is present from birth.
Blink rates vary with different activities and can become slower when concentrating.
Eyes can become red and itchy. If you feel your eyes become dry or tired with computer activities, remember to take frequent vision breaks. Breaks can include momentarily closing your eyes or looking away from the screen. If your eyes tend to feel dry or you wear contact lenses, eye drops of an artificial tear substitute may also help prevent or relieve symptoms. Controlling your lighting Task lighting is typically provided from desk lamps.