If you're a thrifty four-eyes, then you probably know about the online-discount-Chinese-glasses market. Places like 39 Dollar Glasses and Zenni Optical offer seemingly too-good-to-be-true prices on frames and complete glasses.
39 Dollar Glasses is offering a $10 discount on their homepage with promo code LUCKY10, but my sources tell me you can get a $15 discount with promo code cjp15. I ordered a backup pair from Zenni once and they're okay, but not great - they feel a little flimsy and can't really be adjusted because they're made from cheaper materials. But as an emergency backup pair or for prescription sunglasses for summer, these cheapo glasses work just fine. I know it's hard to visualize summer right now, but it will come someday... probably right about when your slow-boat-from-China glasses finally make it here.