I don't, but I just ordered a new pair of prescription sunglasses, and this time I specifically chose a pair that provided good protection for cycling. (These ones, I think, in black.) Not only do I need something to keep the wind and the dust and the cottonwood fluff out of my eyes, but I need something to protect my eyes from light from the sides and the top -- I hate having to leave the visor on my helmet all the time, but if I don't, my eyes feel burned at the end of the ride.