It is much healthier and less weary on the eyes to use the high contrast feature in Windows from (XP up, I believe), by pressing shift+alt+print screen (and space bar.)
One can spend much more time reading on the screen.
Another feature I use a lot is zooming with ctrl++ in FoxIt or Adobe PDF reader, and ctrl+up on the mouse wheel in Mozilla Firefox(and Chrome), some web designers tend to use very small fonts where they shouldn't(let alone blogs, which are designed to be thinned out to leave space for advertising at the sidebars.)
If that doesn't work, I use the excellent gratis ZoomIt tool, to zoom in sections that are otherwise not available through the aforementioned tools.
I tend to distance myself from the computer monitors at least one meter to avoid eye strain and the low but permanent radiation.
Edited by gasto, 19 April 2014 - 08:30 AM.