[fastball1945]

I found this article here:
http://www.student.city.ac.uk/~rc313/computers.html

It explains that the computer screen does not destroy your vision. Just puts stress on your eyes.

Here is the article:

You might get dry, tired eyes and blurred vision every now again when you've been using the computer for a while. But it's nothing to worry about too much.

Linda Metham is an eye nurse at Moorfield's, London's biggest eye hospital. She says: 'Children can get a bit of eyestrain or maybe even a headache, but there's no evidence to say there's any permanent damage that can be done by looking at a screen.'

Nurse Metham says it's a good idea to take regular breaks from looking at your screen. Try looking away at something in the distance, and focus your eyes on that. And speaking of distance, make sure your computer screen isn't too close to you, as this can be bad for your eyes. Get a ruler and see if your face is about 20 inches away from the screen. This is about the right distance.

Also, adjust the height of the computer screen so that the top is slightly below your eye level. This should help keep your head comfortable and upright, so you don't have to tilt your head, which will make your neck ache.

Ideally, the lights in the room shouldn't point directly at you or your screen, but should light the whole room evenly. So don't have just one desk lamp.

I thought that this was an interesting article. I was actually glad after i read it because i tend to spend alot of time in front of the compter.

[Tw34k]

I remember reading a long time ago that our eyes hurt from staring at the monitor for one simple reason....we forget to blink.

why that happens i dont know...but after reading that i caught myself on so many occasions of drying my eyeballs out because i just didnt blink as much as normal.

now i make it a point to blink and i can sit here for hours on end.....

OK....more like minutes....then the wife starts talking and my eyes start rolling..LOL

[irate]

Very, Very Interesting
Link Added to BookMarks

[ginogsm]

But isn't this stress added in your eyes , eventually harmfull ?

[ar1stotle]

maybe your eyes will eventually get used to it and actually be stronger. like lifting weights or something

[Dalsim]

I always blink though, I tend to do that when I think so it is rather hard for me to forget to blink. LOL

[Mac33]

If you blink a lot during extended time in front of a monitor, your eyes wont hurt as much, and it's good eye exercise, as the tendency in front of a screen is to stare which is the worse thing for your eyes causing aches.

[OsirisX]

Doesn't the LCDs put no stress on your eyes?

[Mac33]

so i've heard

[glexp]

Part of the problem is the frame rate of the CRT. Typically this is 60 Hz. The reason for 60 Hz is that is the frequency of our (USA) AC line. It was easy to synch up the TV's of old that way. Today's monitors do not use the AC line frequency to generate the frame rate. So there may be slight differences between the 60 Hz frame rate of the monitor and the 60 Hz rate of the AC line. Those slight differences could cause very slight flickering of the image on the CRT. Barely perceptible, but probably a sub-conscious hindrance. That may be one reason for the suggestion about keeping lights away from the CRT monitor. Yes, your lights do flicker at the AC line frequency. But the human eye's persistence washes that out. By the way, it is that persistence and the persistence of the phosphor of the CRT that makes the "image" on the CRT screen. Remember, the image on the CRT screen is generated by 3 dots of light traveling across the screen one line at a time. The typical rate of travel is 15.75 Khz horizontally. Divide that by 262 (the number of horizontal lines that make up a frame) and you'll get a number that is very close to 60 Hz....the frame rate. Obviously, today's PC monitors use frequencies much higher than the 15.75 Khz rate to get more info in the image. But you'll still be able to generate flicker. For those of you with an EE bent, it is like a beat frequency.

As far as LCD monitors, they don't use the same scan method as CRT's since each pixel is a live set of transistors that maintain their data and don't need to be refreshed like the CRT screen.

Phew, enough of that...my eyes are getting tired of looking at this monitor...gotta get me one of those LCD jobs...