title: Spectacles.
authors.affiliation: Archives Committee American College of Gastroenterology.
authors.forename: Robert E
authors.initials: RE
authors.lastname: Kravetz
mesh_terms: D005139:Eyeglasses / Q000266:history*; D049668:History, 15th Century; D049669:History, 16th Century; D049670:History, 17th Century; D049671:History, 18th Century; D049691:History, Medieval; D006801:Humans