You never realize how fuckin’ bright white is on a computer screen until you’ve had f.lux for a while, and suddenly disable it.
Do your eyes a favor: Get f.lux. It adapts your computer screen to the time of day in your area, and it puts a lot less strain on your eyes. If you do a lot of work from your computer–drawing, writing, etc.–it is a godsend. I was hesitant when someone first recommended it to me, but now I couldn’t do without it. Considering my tumblr dashboard theme, I’d probably be damn near blind by now if I didn’t have f.lux.
It also makes it less difficult to sleep after looking at your screen because it neutralizes the blue of the screen!