Glasses with thick black frames, worn by people that don't actually need glasses, Make Skinny girls look hot in a hot-librarian-loves-the-cock kind of way. Makes fat girls think they look like hot Librarians when they actually look more like Ugly-bitter-librarian- feigning-originality-with-ugly-glasses. Emo Glasses Help skinny boys turn their skinnyness into a "thing" and subsequently gets them laid. Makes Fat boys look like Drew Carey.
"the hot one with the emoglasses next to the fat bitch in the emo glasses"
When used in lyrics by artists with known drug habits/addictions - her will undoubtedly be interpreted by shallow moron fans as a reference to heroin. See Elliot Smith, Alice in Chains if you don't believe.
"'everything Reminds me of Her' is obviously referring to Heroin - Fan-Missing-Chromosome-18"