Your optometrist doesn't carry any? Mine has a few styles of Oakleys, Rudy Project, and another brand or two. Most of them are available with clear or tinted lenses. I can also bring them in any prescription-ready glasses I purchased elsewhere (say, from Optic Nerve or Zeal directly, with our bike group sponsorships) and they will fix the lenses (though that negates any warranty on the frame). Unfortunately I can't get prescription lenses for sport style glasses so I haven't tried any.