birth control glasses
n.pl.— «He also wore thick-framed, Army-issue glasses, an object that earned an unofficial acronym, BCGs—”birth control glasses”—for being remarkably unattractive.» —“Doctor, soldier” by Pam Mellskog in Firestone Daily Times-Call (Longmont, Colo.) Mar. 24, 2005. (source: Double-Tongued Dictionary)