title: [To Benjamin Franklin, father of bifocal lenses, on the 300th anniversary of his birth].
authors.affiliation: Oftalmólogo, Pamplona, España. jnoguera72b@terra.es
authors.forename: J J
authors.initials: JJ
authors.lastname: Noguera-Palau
mesh_terms: D004867:Equipment Design; D005139:Eyeglasses / Q000266:history*; D005197:Famous Persons; D005602:France; D019425:Grenada; D049671:History, 18th Century; D006801:Humans; D055095:Optics and Photonics / Q000266:history*; D010678:Philately / Q000266:history*; D013672:Technology / Q000266:history*; D014481:United States