i can't be exdposed for to much radiation

We are supposed to take a few minutes break every hour when sitting in front of a computer. Headache is a quite common problem for those who use the computer for long time.Apart from all the advice given above, did you try changing the brightness or your monitor? I found that maximum brightness and too much contrast bother my eyes a lot.

It seems more likely your headache would be being caused by screen flicker from the monitor refreshing itself rather than radiation..some people can be more sensitive to flicker from equipment such as screens or fluorescent lighting than others(do you still have a CRT monitor?) maybe you should take more frequent breaks to lessen any problem you might be having ..

Using a computer for so long can bring such problem as headache. I suggest you to take a break in between the time that you use the computer. One thing I do when my eyes are tired is to look away from the comptuer at a far distance probably a tree due to its soothing color green and I do feel better once again when I starting using the computer.

It's common happen to some people. Watching the monitor of computer for longer time ( more than one hour) will make our eyes become so tired. As other part of body that can feel tired, it is the same for your eyes too. So, taking a rest for your eyes is better solution for you and you have done it. Good job, friend. This condition will give no effect for once or twice act but it will be felt after longer time whenever those eyes are so tired cos of this habit. So, it is better for you to see other things after watching your monitor for one hour and try to wink your eyes as often as you can after some minutes cos we often become to focus on watching the monitor and less winking.