If you spend lots of time looking at a computer screen, you could be at risk for computer vision syndrome, or CVS. Learn more from WebMD about its effect on the eyes, including ways to prevent CVS.

Both the screen test and the input lag test are available online in HTML or Flash and as a stand alone executable. For other screen tools, check out Calibrize and Screen Check. What do you think ...

Unfortunately, the screen also suffers from the pitfall of having been designed by a consumer electronics firm: it lacks the sort of flexibility that computer users expect.