I got my best cycling glass a a welding supply store. They're comfortable, block UV, and wrap around to keep out flying insects and blowing dust. Like several others mentioned, under $5.00. I've been told they're not bad looking, either.
Mine are very lightly tinted, which doesn't affect UV protection at all. When the sun is on the horizon, I shade my eyes with a cycling cap, which is one of the all time great ideas.
Some people are like a Slinky ... not really good for anything, but you still can't help but smile when you shove them down the stairs.