Hermann von Helmholtz was many things to many people: physicist, teacher, medical doctor, aesthete and more. He drew on his extensive knowledge of many fields to invent the ophthalmoscope-a device that revolutionized ophthalmology-when he was just 29 years old.
© 2010 Optical Society of America
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Vol. 5, Iss. 6 Virtual Journal for Biomedical Optics
Barry R. Masters, "Hermann von Helmholtz: A 19th Century Renaissance Man," Optics & Photonics News 21(3), 34-39 (2010)