Wear reading glasses, even if you don't think you need them. Set the color scheme in your editor to black on light yellow (this combination works well for me, YMMV). If you're using a CRT, either switch to an LCD or drop your resolution down a setting.
I wear glasses full-time. I am myopic already. The color scheme on ViM is already pale yellow on dark grey (I think this works better than black and yellow, try it). How will the resolution bit help?
Thanks for the response.