Source : Free On-Line Dictionary of Computing

raster burn
     
        1. (Or terminal illness) Eyestrain brought on by too many
        hours of looking at low-resolution, poorly tuned, or
        glare-ridden monitors, especially graphics monitors.
     
        2. The "burn-in" condition your {CRT} tends to get if you
        don't use a {screen saver}.
     
        [{Jargon File}]