I am a road cyclist with high prescription eyeglasses, so the cycling sunglasses like the Smith prescription ones did not come in my strength.  My regular prescription sunglasses were too small in the front, and did not have sides, so on downhill runs my eyes would tear and sand and junk would always get in my eyes.  I bought two pair of the Fitovers - one Trilenium Gold for cloudy days, one PDX Grey for sunny days, and they are perfect.  A great and affordable solution. Clear optics, great fit (the Aviator is the biggest one and it goes over my glasses easily).