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Computer Vision Syndrome


In this issue, we attempt to help you understand Computer Vision Syndrome (CVS) which is a term used to describe eye strain and tiredness, temporary weak vision, dry irritated eyes, light sensitivity that result from prolonged use of computers.

CVS affects 75% of the people who work on computers, more often those over the age of 40 years and those who wear spectacles.

Dry Eyes:

As we stare at the computer screen, our blink rate decreases. We actually blink 66% less while working on the computer. This causes our eyes to feel dry and to burn.

Solutions:

Every 30 minutes blink 10 times by closing your eyes as if falling asleep(very slowly).
Take a vision break every 15 minutes or so.
Use eye lubricants like Aqua tears if required.

Glare & Reflection:

Reflections from your monitor can make your eyes tired. You may find yourself squinting or sitting in a posture that is fatiguing in order to "get around the glare".

Solutions:

Reposition your monitor so that it doesn't face the windows.
Adjust or add window blinds.
Use glare filter screens

Your Monitor:

The redraw or the refresh rate of many monitors is 60 Hz. This speed can cause a flicker that makes the screen appear to roll. The flicker stimulates the eyes to refocus, tiring the visual system.

Solutions:

Reset the refresh rate of the monitor to 70-85 Hz.
Match the brightness of the environment with that of your computer.
Make sure that the contrast between the screen background and the on-screen characters is high Keep your screen free of dust and smudges.
Adjust the height of your monitor; the center of the computer screen should be 4-9 inches below your eye level.
Try to position your monitor about 20-26 inches away.
Consider computer glasses; these can be worn alone or over contact lenses.
Consider a anti-glare coating on your lenses.
Look away from your computer screen every 30 minutes, and focus for 5-10 seconds on a distant object outside.

We hope these smart vision tips will be useful in preventing eye strain and help in taking better care of your eyes.