Okay, here's the thing about Zenni Optical . . .

I just saw today that Zenni Optical has a deal going on where you can upgrade to tinted lenses for no extra charge (for a limited time, but I'm not sure how long - no code needed). So yeah, I bought myself some new prescription sunglasses today.

I've been buying glasses from Zenni for years now, and I've bought several pairs, both regular prescription glasses and prescription sunglasses. They are really the cheapest source of glasses I have been able to find, and they have a lot of interesting and stylish frames available. Even with my extremely bad eyesight and a prescription that includes astigmatism, I've got all my glasses for $30-60 a pair. Considering that previously I was paying upwards of $400-500 for a pair of glasses, that's pretty exciting.

Here's what you need to know if you're thinking of going this route for glasses, though: