In every discipline, there are those who care too much about such pointless trivialities. I just hope that the author leaves the correct pause at the end of every spoken sentence, too. But I pray that I am not caught up in that conversation!
http://ergonomics.about.com/od/eyestrain/a/reduce_contrast.h...
1 Monitors vary greatly in their color intensity. 2 For emissive rather than reflective displays (that is, monitors rather than paper), increasing ambient light decreases contrast. I've found a huge number of websites are very unreadable not only on mobile devices (which tend to get used out-of-doors) but on desktop and laptop screens if there's a high level of indoor lighting. Worse if there's low-angle early-morning or late-afternoon sun.