Eyesight isn't What it Used to Be? Try this.

If your eyesight isn't quite what it used to be, then here's a trick you can try.
It's called “High Contrast” mode. Here is how to make the change.

Press: Left Shift+Left Alt+Print Screen all at the same time

A window will pop up, asking you if you'd like to turn this mode on. Click “Yes”. Your desktop will undergo a magical transformation. Text will turn white, the background will turn black and you may see things a little clearer than you used to.

If you don't like it, just repeat the key combination and everything will go back to normal. This tip applies to both XP and Vista.