Many here like Zenni for cheap glasses, I order frequently and think their quality easily compares to the average optical shop frames and lenses. Just bought my son 3 pairs for $71 total with AR coating delivered. He eats them for breakfast (no better with the more expensive ones)...

https://www.zennioptical.com Code is B2G1 good through 12/1

"Buy any two pairs of eyeglasses and get a third pair of eyeglasses of equal or lesser value free with promo code B2G1. This offer is valid only on purchases made 12:00 am PDT November 26, 2014 thru 11:59 pm PDT on December 1, 2014."