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After working for few hours in front of computers, sometimes eyes become red. What causes this and how to avoid it?

There is a condition called Computer Vision Syndrome (CVS). The typical symptoms of CVS are:
– Headaches, especially in front of head.
– Loss of focus.
– Burning, irritable, tired eyes.
– Inability to read for prolonged periods of time.
– Neck and shoulder pain.

CAUSES OF COMPUTER VISION SYNDROME

– Energy respond differently to characters on computer screen as compared to printed characters.
– The characters on a computer screen neither have contrast or sharp edges. These characters have their brightness. maximally at the center and decrease in intensity towards their edges. It makes it difficult for eyes to maintain focus and remain fixed onto the images.
– The continuous flexing of the eyes focusing mechanism leads to fatigue and a burning, irritable, tired-eyes feeling that is so common after sitting long hours at computer.

PREVENTION OF COMPUTER VISION SYNDROME

– Wear proper glasses that will allow you to work comfortably and productively.
– Use proper lighting by eliminating harsh, distracting, exterior light that cause eye strain by closing drapes, shades or blinds. Reduce interior lighting by using fewer light bulbs or fluorescent tubes.
– Minimize glare.
– The computer display screen should be upgraded. New LCD screens are easier on the eyes. Select screen refresh rate of at least 75 Hertz. Maintain the highest resolution possible.
– The display settings should be set so the brightness of screen is about same as work environment.
– The text size should be three times the size of the smallest text you can read from a normal viewing position.
– Do not stare and work at a stretch at the computer. Blink often to avoid dryness and irritation. Tears coating the eye evaporate more rapidly during long non-blinking phases.
– Relax your eyes.
– Modify your workstation. If you need to look back and forth between a printed page and computer screen, it can cause eye strain.
– Stretching is necessary in between the work to prevent neck, back, and shoulder pain.
– Take a 10-min break every hour to stand up, move about and stretch.

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