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Lighting for Computer Workstations
Lighting not suited to working with a Video Display Terminal is a major contributing factor in visual discomforts including eyestrain, burning or itching eyes, and blurred or double vision. Typical office environments have illumination levels of 75 to 100 foot-candles, but according to the American National Standards Institute (ANSI), computer workstations require only 18 to 46 foot-candles.
Use the following recommendations to reduce eyestrain and eye fatigue:
• Close drapes/blinds to reduce glare.
• Adjust lighting to avoid glare on screen (light source should come at a 90 degree angle, with low watt lights rather than high.)
• Place monitor at 90 degree angle to windows (where possible).
• Reduce overhead lighting (where possible).
• Use indirect or shielded lighting where possible.
• Walls should be painted medium or dark color and not have reflective finish.
• Use a glare screen to reduce glare (alternatively, place a large manila folder on top of the monitor and let it hang over the monitor 2 inches -3 inches to reduce glare from overhead lighting).
