125 years of indirect ophthalmoscopy.
D005060:Europe; D005858:Germany; D049672:History, 19th Century; D049673:History, 20th Century; D006801:Humans; D019721:Ophthalmoscopes; D009887:Ophthalmoscopy / Q000266:history* / Q000379:methods; D006113:United Kingdom; D014481:United States