If you have insurance coverage for new frames/lenses per year, skip a year on getting regular prescription and opt for sunglasses.
When I purchased my sunglasses, I used my allowance on prescription sunglasses. Often times manufacturers will make the same frame for "prescription lenses" that are a hair different that their "sunglass lenses". So I used my full frame allowance on Oakley frames, then the insurance covered the basic lenses and some of the regular coatings for prescription lenses (like UV protection, scratch resistance, polycarbonate lenses), and then they covered a percentage of the sunglass coatings (tinting, color, polarization). So instead of a $500 pair of Oakley's, I spent just over $200 for Oakley frames and DOC lenses.
Often times insurance won't cover lenses by name manufacturers, like Oakley, Maui Jim's, and so forth, but your eye doctor should be able to have their lab make up lenses for those frames. And your eye doctor can tell you what would be best for you.
I have really bad vision, since I was a kid. So I can't just pop over to a drug store and pick up any off the shelf. I cherish my Oakleys with my life, because I know it'll be a long time before I can replace them.