Jan Purkinje and the ophthalmoscope.
D000818:Animals; D005060:Europe; D005654:Fundus Oculi; D005858:Germany; D049672:History, 19th Century; D049673:History, 20th Century; D006801:Humans; D009799:Ocular Physiological Phenomena; D019721:Ophthalmoscopes; D009887:Ophthalmoscopy / Q000266:history*