Sweep,
I tried the Oakley M frame prescription setup. They are too low for me and another fella at the range that tried them as well. Shooting glasses need to be high and wide. Those Oakley wrap around styles just don't work for some of us.
The things I ran into with the glasses I finally settled on was ensuring pupil center to center distance was right when they grind the lenses and also ensuring that the lense centers were up and left as your eyes point during a gun mounted and aiming position. IMO, having an optomitrist/optomologist mark the dummy lenses with your pupil centers while you simulate a mount/aim is the best way to do this. Mail ordering a prescription doesn't allow this level of fitting.
I'd highly recommend you get frames and have your Dr make the lenses after a fitting as I described.
