title: History and pre-history of optotypes: From Alcor and Mizar to the ETDRS optotype.
authors.affiliation: Servicio de Oftalmología, Hospital Universitario del Henares, Coslada, Madrid, España; Universidad Francisco de Vitoria, Pozuelo de Alarcón, Madrid, España. Electronic address: juliogmm@yahoo.es.
authors.forename: J
authors.initials: J
authors.lastname: González Martín-Moro
authors.affiliation: Facultad de Óptica y Optometría, Universidad Complutense de Madrid, Madrid, España.
authors.forename: J L
authors.initials: JL
authors.lastname: Hernández Verdejo
authors.affiliation: Real Escuela de Adultos, CFA Mare de Deu de Montserrat, Barcelona, España.
authors.forename: G
authors.initials: G
authors.lastname: Azurza Rivas
mesh_terms: D005602:France; D049671:History, 18th Century; D049672:History, 19th Century; D049673:History, 20th Century; D049690:History, Ancient; D006801:Humans; D054554:National Eye Institute (U.S.); D015203:Reproducibility of Results; D055609:Stars, Celestial; D014481:United States; D014787:Vision Tests / Q000266:history* / Q000295:instrumentation; D014792:Visual Acuity