Thanks to celebrities-turned-hipsters such as M-K Olsen, Lauren Conrad, Justin Timberlake, Johnny Depp, and Justin Bieber (just to name a few), these nerd-tastic classic eyeglasses have become a new {again} fashion staple. The Ray-Ban Wayfarer, made popular in the 1950s and 60s, has been amidst a MAJOR comeback for the past few years in sunglasses and, more recenty, in eyeglasses. Even those who are not vision-impaired are wearing them as an accessory. Knock-offs of the bold, plastic…