title: A 50th anniversary celebration.
authors.forename: Nathan
authors.initials: N
authors.lastname: Efron
mesh_terms: D000846:Anniversaries and Special Events; D003263:Contact Lenses, Hydrophilic / Q000266:history*; D004867:Equipment Design / Q000266:history; D049673:History, 20th Century; D049674:History, 21st Century; D006801:Humans