Your Eyes and the Computer
Working at the computer is a visually demanding task. Did you know that 75%-90% of computer users experience computer related eyestrain? This can occur at any age, even in adolescence! The most frequent visual complaints are:
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Eye Fatigue
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Eye Irritation
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Headaches
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Double Vision
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Burning Eyes
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Itching Eyes
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Difficulty Focusing
Why does this happen? Viewing a computer screen is different than viewing a typewritten or printed page:
The letters on a computer are not as precise or sharply defined
The level of contrast between the letters and the background is reduced
A computer screen has glare and reflections
Viewing distances and angles are different from other visual tasks
The focusing and eye movements required when using computers places additional demands on our eyes
Many computer users have vision complaints they would not otherwise suffer from if they were not performing such visually demanding tasks.
What Should Be Done?
All computer users should have a complete eye exam. Eyeglasses prescribed for driving vision often fail to meet the demands for computer use. Special glasses can be prescribed for the computer either as single vision or progressive no line bifocals. Certain anti-reflective coatings or tints can also aid in relieving computer-related eyestrain.
Lower illumination levels. Most offices have high illumination that “washes out” images on the screen. When adjusting the light level is not possible, a light intensity filter (special tint) can be added to your lenses or placed in front of your computer screen.
Take vision breaks. Change your focus. Glance across the room or out the window each hour to give the eye muscles a chance to relax
Blink your eyes regularly. Concentrating and staring at the display monitor often inhibits blinking. Poor tear flow over the eye due to reduced blinking leads to eye irritation and dryness. Using artificial tears (rewetting drops) which can be purchased over the counter also help with dryness.
Display Terminal Position. The size of letters on the display and the adjustability of the workstation best determine the appropriate distance from your eyes to the screen. 20-28 inches is generally recommended. The eyes should be in a downward gaze of about 15 degrees and the screen should be tilted away from the operator 10-20 degrees.
Reduce Glare. By repositioning the workstation the face of the display screen should be at a right angle to any windows or bright light source. Adjustable shades, blinds or curtains can be used to control light levels.
Lighting. Light should be directed so that it does not shine in the operator’s eyes when the operator is looking at the screen.
Use of a document holder. It allows you to position viewing materials conveniently and reduces eye movement and stress on neck and shoulder muscles.
*Some information in the newsletter was used from a brochure written by Desktop computer lenses.
Our office performs comprehensive vision exams including measuring the need for computer glasses and treatment for dry eyes. Call and request an appointment today. Bring in this coupon to receive 15% off your next pair of computer glasses.