Sunglasses

I am having laser eye surgery in a few weeks. They highly recommend that you wear sunglasses that have UVA and UVB protection after surgery. I have never really liked wearing sunglasses before and I suspect that I will lose them and damage them. Does anybody know if drug store quality sunglasses offer similar protection to high-end sunglasses? The FDA does not regulate sunglasses, so I don't know if the sticker on the drug store glasses indicating the UVA/UVB protection is accurate.