We have been diagnosing and treating Computer Vision Syndrome since the old monochrome green or amber video monitors became popular in the 1980s. The early low resolution CGA color monitors were even worse. Those monitors could cause a headache in minutes!
Maintaining clear, binocular vision at a fixed mid-near distance always causes some focusing and eye converging challenges. How any individual compensates for that eyestrain determines how comfortable they will be viewing a computer monitor. For short periods of time, it may not be a concern. If that stressful eye posture has to be held for eight hours or more, the eyes may be crying out for relief, but you may not recognize the symptoms.
Headaches, eyestrain, blurring vision, slow or difficult focusing, tearing, dry eye, double vision, neck and shoulder aches and fatigue, and pressure in or behind your eyes have all been common complaints associated with computer use. Since every individual is different, every person will adapt to the strain of computer use differently.
We have the ability to identify the specific cause of the eyestrain and eliminate it with special computer glasses. There is relief at the end of this tunnel for computer users.
There is more information about Computer Vision Syndrome at www.prio.com.