If you want to blow people's minds at work, get both versions of this medium-wide, full-rim, square-style, hypoallergenic acetate Unisex eyeglasses frame with a black-and-white checkerboard pattern on the temple arms. Monday, wear the version with white on the front. Tuesday, wear the version with black on the front. People will know something's different, but they won't be sure. Then wear the white one again Wednesday. The first person who figures out what's going on deserves a little reward. You could take them out for drinks Friday, or better still, let them know where you got such great glasses so inexpensively. Either way, they'll be grateful.