Cal --- take it from one who has been down the road you are now on. I don't know the shape of your prescription glasses, but have the following suggestion. Go to BJ's and look at the spinner rack near their eyeglass service. They are clipon's and they are polarized. Cost about 17 buks I think and they work just fine.
I have a optomotrist who is a friend and I brought a pair of the clipons to him to check for polarizing an UV effectivness. He was surprised at the quality of the sunglasses and told me they were as good as getting prescription ground polarized sunglasses.
I now buy them two pair at a time. Keep a spare just in case I loose em.
