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2019-11-06 09:35:26
HELMHOLTZ, Hermann von.
Beschreibung eines Augen-Spiegels zur Untersuchung der Netzhaut im lebenden Auge.
Berlin: A. Förstner, 1851. First edition. First edition, an exceptionally fine copy in original printed wrappers, of this famous work which describes Helmholtz's announcement of his invention of the ophthalmoscope, one of the most important clinical tools in medicine, which greatly improved the ability of ophthalmologists to diagnose eye disease and revolutionized visual science. The invention of the ophthalmoscope by Helmholtz has been called "the greatest event in the history of ophthalmology, which advanced it toward the goal of independence as a specialty" (Gorin). This invention was a by-product of Helmholtz's attempt to demonstrate to his physiology students that when the human eye is made to glow with reflected light, the light emitted from the pupil follows the same course it took in entering. Realizing that if the light could be brought to a focus the details of the retina would be made visible, he invented a device to accomplish this objective. "With this instrument it was possible for the first time to examine the interior of the living eye. Although crude attempts had been made earlier to see into the eye, it was Helmholtz's invention of a workable instrument in 1850 and the publication of his monograph in 1851 that laid the basis of scientific ophthalmology. Helmholtz's invention of the ophthalmoscope arose from an attempt to demonstrate for his class in Königsberg the nature of the glow of reflected light sometimes seen in the eyes of animals such as the cat. When the great ophthalmologist A. von Graefe first saw the fundus of the living eye, with its disc and … [Click Below for Full Description]
Bookseller: SOPHIA RARE BOOKS [Denmark]

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