the problem with shopping for sunglasses at the thrift store is that some of them are people's actual prescription glasses and there's no way to tell until everything's all blurry
anyways, I think I've tried on every pair of glasses within walking distance from my house, and my favorites were: - 70s crystal bifocals - round boys - safety goggles from some high school chemistry lab (not pictured, but would have bought if I was going for a Miss Frizzle thing)