Computer Vision Syndrome

February 29th, 2008



The New York State Optometric Association (NYSOA) today alerted New Yorkers who use computers daily that they could suffer from “computer vision syndrome,” leaving them vulnerable to problems like dry eye, eyestrain, neck and/or backache, light sensitivity and fatigue.



According to NYSOA, computer vision syndrome is related to poor workstation configurations, prior vision problems and improper work habits – and can potentially affect eight out of 10 computer- or PDA-users. NYSOA also points to a recent national survey that showed that 42 percent of respondents spend three or more hours a day in front of computers or on handheld devices. And 78 percent do not have their computer monitor positioned at the correct height – below eye level.



“Working at a computer requires a great deal of eye movement and eye focusing. The constant re-focusing effort stresses the eye muscle, leading to computer-related vision problems. It can have a great impact on individuals’ comfort and productivity, whether they are at work, school or home,” said Cate Scandiffio, O.D., of Brentwood, NY who is the president of NYSOA’s Suffolk Optometric Society.



Optometrists say many of these symptoms are temporary and will improve after ceasing computer work. However, some individuals may continue to experience visual problems, such as blurred distance vision, even after computer work has ended. If the causes of the problem are not addressed, the symptoms will recur, and perhaps worsen, with future computer use.



Special computer glasses and computer screen filters are available to help reduce glare and discomfort, but only 11 percent currently use these devices.



NYSOA recommends following these guidelines to prevent or reduce eye and vision problems associated with computer vision syndrome:



Have your vision checked regularly. Prior to age 61, adults should have a comprehensive eye exam every two years, or as recommended by an eye doctor, and annually after that age. Vision and eye health can change rapidly and frequently, particularly as one ages; therefore, having one’s vision examined on a regular, timely basis is important to maintaining overall health and for preventive reasons.

Limit the amount of time you continuously use the computer. Practicing the 20/20 rule (look away from the computer every 20 minutes for 20 seconds) will minimize the development of eye-focusing problems and eye irritation caused by infrequent blinking.

Check the height and arrangement of the computer. Optometrists suggest more comfortable computer viewing can be achieved when the eyes are looking downward. Optimally, the computer screen should be 15 to 20 degrees below eye level (about four or five inches) as measured from the center of the screen and 20-28 inches from the eyes.

Check for glare on the computer screen. Windows or other light sources should not be directly visible when sitting in front of the monitor. When this occurs, turn the desk or computer to prevent glare on the screen.

Reduce the amount of lighting in the room to match the computer screen. A smaller light can be substituted for a bright overhead light or a dimmer switch can be installed to give flexible control of room lighting. Turn three-way bulbs to the lowest setting.

Keep blinking. To minimize the chances of developing dry eye when using a computer, make an effort to blink frequently. Blinking keeps the front surface of the eye moist.

Viewing a computer screen is different than reading a printed page,” said Dr. Scandiffio. “Often the letters on the computer screen are not as precise or sharply defined, the level of contrast of the letters to the background is reduced, and the presence of glare and reflections on the screen may make viewing difficult.”


Computer vision syndrome can be diagnosed through a comprehensive eye examination. To find an optometrist in your area, or for additional information on eye health (including glaucoma)please visit NYSOA’s website at www.nysoa.org.