I just went to order a pair of RX Thread 6.0, is it possible to have Oakley prescription clear lenses put in them? My eye doctor said I could only order the frame, and that I had to have polycarb lenses cut and put in, so they will be non-oakley lenses. ALso I'm getting charged $90 for generic lenses, I was under the impression that Oakley frames would come with Oakley lenses, anyone have any idea if this is possible, also what is the cost verses the $90 for generic? Thanks for the help!