title: Philadelphia seen: two centuries of ophthalmology.
authors.forename: G
authors.initials: G
authors.lastname: Worden
mesh_terms: D049672:History, 19th Century; D049673:History, 20th Century; D006801:Humans; D009144:Museums / Q000266:history*; D009885:Ophthalmology / Q000266:history*; D019721:Ophthalmoscopes; D009887:Ophthalmoscopy / Q000266:history; D015143:Philadelphia; D012955:Societies, Medical