Computers and Computer Vision Syndrome

By Thomas P. Finley, OD

Dr. Finley's Family Eyecare

. http://visionsource-drfinley.net/

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Computers and Computer Vision Syndrome

Computer Vision Syndrome (CVS) usually occurs in people who work on a computer more than two hours per day.
It is caused by the continuous flexing of the eyes' focusing muscles when working on the computer. It is also caused by the difference in how the eyes focus on the pixels of a computer monitor versus on printed material. Symptoms of CVS include
– Headaches
– Loss of focus
– Burning, watery and tired eyes
– Blurred vision or double vision
– Eye fatigue including heaviness of the eyelids or forehead
– Neck, shoulder and back pain, and muscle spasms.
Reducing Computer Eyestrain
Computer eyestrain is the number one office-related health complaint. There are measures one can take to reduce the symptoms of CVS.
Comprehensive Annual Eye Examination with Special Computer Testing. In addition to making certain your eyes are healthy, your exam should include tests to make certain your eyes are balanced with each other and can see well far away, up close, and at your normal computer working distance.
Make certain you also tell your doctor how much time you spend on a computer each day. Options such as special “stress relieving” computer glasses to reduce CVS should be discussed.
Use Proper Lighting. Eyestrain is often caused by excessively bright light both inside and coming in from outside. When using a computer, your room lighting should be at a comfortable level and not too bright. Control exterior light by closing drapes, shades or blinds. Attempt to position your monitor so that the windows are to the side instead of in front or behind.
Minimize Glare. Glare from walls and finished surfaces, as well as reflections on your computer screen can also cause eyestrain. If you can see your reflection in your monitor, you probably have a glare problem.
Glare, reflections and overhead lighting will force your eyes to work harder. Anti-glare filters will help. Make certain to clean your filter and monitor on a regular basis. If you wear eyeglasses while working on a computer, have anti-reflective lenses to minimize glare. Adjust the brightness of your computer screen for the best contrast and optimal visual comfort.
Blink More Often. Blinking is very important when doing computer work. When we blink, we produce tears that rewet our eyes and prevent dryness. Supplementing your normal tears with over the counter artificial tear drops helps prevent dryness and keeps your eyes feeling refreshed and comfortable.
Take Vision Breaks. About every five to ten minutes, look away from your computer screen and across the room for about five to ten seconds. This allows your eyes to relax its focus. Take a ten minute alternate task break every hour. Giving your eyes and your body these much needed breaks helps prevent chronic fatigue.
Adjust Your Workstation. Position your monitor at least 20 inches away from your eyes. Place your monitor so that the top of it is at eye level to avoid additional dryness.
These suggestions should help prevent computer vision syndrome.