iMac 20'' hurts my eyes
I know this is a thread for 24'' users, but I have the same problem with an iMac 20''.
I have better than 20-20 vision, but with the iMac 20'' my eyes hurt, turn red, and later lose focus. The former begins in less than a half hour, the latter after a few hours. If I'm on for any longer, it gets to the point where reading a book or newspaper afterwards is annoyingly difficult. And on the days where I happen to use it throughout the day, my friends have actually commented on the fact that my eyes look "out of focus" or "bloodshot." Throw on a Bob Marley t-shirt and I think the assumption would be obvious.
Now, I know red eyes are not unusual after staring at a computer screen. But I also own an iBook, and can use it for more than 12 hours without a problem. (I now use that laptop whenever possible.)
What is unusual is that my eyes are actually losing focus semi-permanently; that is, this monitor is causing a lasting effect - one that is noticeable long after I finish using the computer. That worries me. Are there others experiencing this problem? I've installed the utility mentioned in an earlier thread (http://www.charcoaldesign.co.uk/shades), but I can feel that my eyes aren't responding any differently.
I sit further than my arm can reach, but still get the feeling as if I were staring at a TV screen too closely. I also have the curtains drawn, but can see my own reflection in the screen.
Is it glare? Is it brightness? Has Apple incorporated a new type of display? Why are people who have never had this problem experiencing it now?
If, in my case, the severity is somehow uniquely strong, then I again would like to mention that I have nothing to suggest a predisposition for it. I've never had this problem before, have excellent eyesight, and do not have the same problem with other Apple monitors. Or any other monitor. It is just this computer.
Sadly, it's time to finish this post - my eyes are starting to hurt.