These lenses are designed for Mountain Biking and fit M-L. Click on "view all models w/ this lens" for frame options. Not that I wear my glasses much, but I have a pair of Tifosi's w/ changeable lenses and this particular lens is great for biking.
http://www.tifosioptics.com/technology/fototec/
Ya didn't see me do it. Ya can't prove it!