title: Historical note on subjective refraction, trial lens sets, and phoropters.
authors.forename: David A
authors.initials: DA
authors.lastname: Goss
mesh_terms: D005060:Europe; D005139:Eyeglasses / Q000266:history* / Q000592:standards; D049670:History, 17th Century; D049671:History, 18th Century; D049672:History, 19th Century; D049673:History, 20th Century; D049691:History, Medieval; D006801:Humans; D009656:North America; D009907:Optometry / Q000266:history*; D012029:Refraction, Ocular; D014787:Vision Tests / Q000266:history*