Using computers doesn't cause any damage to anybody’s vision. But spending almost all the time before computer fatigues the eyes. One may feel tired and sleepy because of this. This is called Computer Vision Syndrome or CVS. CVS has been spotted in 85% of those who use computers. Studies have revealed that of the 143 million computer users in United States, 88% suffer from computer vision syndrome. Symptoms are more found in those between 30 and 50. There has been a considerable increase in the number of those who use computer at office and at home.