A few months ago, my eyes had taken the brunt of a massive web-host searching exercise. For a couple of days I could not wear my spectacles(!!) and was forced to take some days off.
So, now I see to it that I don't strain my eyes. How do I do that? By obeying Workrave
100%, no ifs, no buts.
Basically, every few minutes, you turn around, look around, stretch, yawn, shrug a couple of times, look over your shoulder this side and that.... and so on.
Also, get up every hour, have a glass of coke/water/juice/coffee
Scribble a few ideas on paper instead of in paint/gimp/ etc.**
I'm also thinking of buying a different kind of mouse (mouser needn't worry
- he's the mousest of them all
) and a pen/tablet or whatever it's called. Those aren't only for webdesigners and they come relatively cheap nowadays. The high resolution ones are for the pro artists, IMO.
**You don't need to worry about the environment, just plant trees all over the place, even the wild ones that grow without your help - that'll help the envionment more. Paper notebooks are the lesser criminals. Furniture and wooden floors - that takes up more wood.