It's no secret that eye liner is one of the best things invented, ever. Originally worn by the Egyptians way back when, the black stuff has gone through countless iterations (and myriad colors!), and is now available in almost every medium imaginable. It's easy to see why beginners and buffs alike still have problems choosing their ideal liner, and every formula has its own merits and downfalls to consider. If you’re stumped and don’t know how to embrace the world of eye definers, scan our guide to the basics first.