A survey by Sheedy (1992) estimated that 14.25 percent of optometric patients had symptoms primarily associated with VDT use. This means that out of the 75 million eye exams given each year in the United States, over 10 1/2 million address VDT problems.

Since VDT work puts high demands on the visual system, minor visual disorders which could go unnoticed in other types of work will cause symptoms in a computer user.

Before visiting an optometrist, take measurements of your eye to screen distance, your eye to hard copy distance, and the angle at which you view the screen. Draw a picture to show the placement of windows and other light sources.

Your optometrist can then prescribe lenses tailored to your work environment. A good resource for optometrists is "Video Display Terminals, Solving the Vision Problems" by Sheedy (1990).