Looking at computer too long won't make you go blind but concentrating on computer for a long time is definitely harmful to the eye. First of all, the extremely nervous nerve can make eye swollen and the functionality of optic nerve chronic will decrease. Furthermore, using eyes for a long time will lead to the development of axial myopia. In addition, the reduction of the action of blink of eyes can make the eye lack of lubrication and protection. According to statistics, the number of normal people's blink about 15 times per minute, but when look focused, it is only 2 or 3 times, which can makes too much evaporation of ocular surface tear causing that the eye can not get timely supplement. As time passes on, it will cause the inflammation of the eye surface.