Definitions for "Computer Vision Syndrome"
CVS is caused by our eyes and brain reacting differently to characters on the screen than they do to printed characters. If you spend more than two hours each day in front of a computer screen, you likely experience some symptoms of computer vision syndrome or CVS. Including: headaches, loss of focus, burning/tired eyes, double vision, blurred vision and neck and shoulder pain.
Vision problems that result from focusing closely on a computer screen for long periods of time, from poor lighting, or from glare.
As defined by the American Academy of Optometry, CVS is "the complex of eye and vision problems related to near work which are experienced during or related to computer use."