Worldwide 70 million workers are at risk for computer vision syndrome. This does not include the millions of children and adolescents who spend many hours a day playing video games. The symptoms of computer vision syndrome are: blurred or double vision, burning, itching, dryness, and redness. The symptoms are due to the fact that electronic characters are made up of pixels which have blurred edges making it more difficult for eyes to maintain focus. Unlike printed words which have sharp and defined edges.
There are additional problems beyond eye irritation. We blink less when working on the computer which can cause dry eyes. When looking straight ahead the eyes should be at the top level of the monitor. The screen should be about 20-26 inches away from the face. The closer the eyes are to the monitor, the harder they have to work to accommodate to it. Improper lighting and glare are another problem. The screen should be brighter than the ambient light. Overly bright overhead light force the eyes to strain to see what is on the screen.
Every 20 minutes, take a 20 second break and look at something 20 feet away. Consciously, blink to keep the eye surfaces lubricated. Apply warm moist compresses to your eyes for relief.