I just bought a pair of Rudy Project Horus and they're such an improvement over my normal glasses.

What surprised me, is I'm faster. My neck isn't very flexible, and I have to strain to keep my head up when tucking. I'd have to squint to push my glasses further up to look through the lenses at the top of my field of vision. But now with the sunglasses, I can tuck lower, for longer, with more confidence. My lower back was even hurting for 15 mins after my ride because I was in the drops for longer, which didn't happen on previous rides. So therefore, I got faster because I bought sunglasses.

and I highly recommend anyone with glasses to get some quality sports [sun]glasses