Ever wonder why your eyes get tired after staring at a PC screen for hours? Gunnar says it's because of the LCD screen's cold color temperature. According to these folks, the bluish tints your PC screen displays strains the eyes, you don't blink as much and your eyes don't hydrate.

Gunnar's solution is yellow-tinted glasses that warm up the color temperature. You blink more, your eyes don't dry out — ergo, less eye strain, more productivity. Except everything looks jaundiced, which is how we view these shades, considering they'll run you $100 to $189 a pair. If you believe the spiel, try $5 drugstore sunglasses.