Hi,
I was searching for glasses that functioned both as pool and recreational sports glasses. I went with the Oakley Cross Hair frames and Had Oakley grind the lenses. My doctor told me that most shops can only do 9 point grids and oakley could do 11 (whatever this means, I don't really know, but it seems to be true as only Oakley could put these lenses in these frames), which allowed them to be able to put prescription lenses in more of a wrap-around type frame. I also went with transitional lenses and they do work extremely well. I have been very happy with my decision.
I am a low profile shooter, almost touching my chin to my cue and I don't see over top of my glasses at all. its almost as if I have goggles on but a lot better looking.
FWIW
Vee