Originally posted by: MadOni0n
do crt damage your eyesight or just cause eye strain (head hurts, eyes hurt)?
Can A Computer Screen Damage My Eye?
Twenty years ago, few offices workers used computers, let alone had computers. However
with the dramatic increase in home and office computer use, complaints of eye fatigue and
discomfort are commonplace. Many people assume increased computer use is the source
of these complaints. But
extensive testing in government and private laboratories has not
produced scientific evidence that computer monitors will harm your eyes. Research has
established that computer monitors emit little or no hazardous radiation, such as x-ray, or
non-ionizing radiation, such as ultraviolet rays.
While
computers have no known harmful effects on eyesight, computer users do often
complain of eye related symptoms such as eyestrain, headaches, fatigue, dry eyes, and
difficulty focusing, these symptoms
(Computer Vision Syndrome - CVS) however are
caused not by the computer screen itself but rather by the conditions surrounding the
computer screen, such as poor lighting or improper placement of computer equipment
and computer furniture. In some instances, a pre-existing eye problem may be the cause.
EYES AND VISION
There are a number of symptoms that may be experienced by computer operators. These symptoms include: visual fatigue, blurred or double vision, burning and tearing eyes, headaches and frequent changes in eyeglass prescription.
There is no scientific evidence that computer work causes permanent eye damage, but the temporary discomfort that may occur can reduce productivity, cause lost work time and reduce job satisfaction. Eye complaints are usually the result of glare (direct, specular or diffuse) or visual fatigue.
Originally posted by: Tabb
Your eyes subconciously are constantly in and out of focus when you look at a CRT monitor, because the image isnt constantly on the monitor.
Why would your eyes go in and out of focus? The phosphorus coating on the inside of the monitor is in a vertical plane (slight curviture in non-flat displays). It doesn't matter whether or not the image is continually being refreshed because your focal depth remains constant.