Ophthalmoscope
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In medicine and the physical examination, ophthalmoscopes are "devices for examining the interior of the eye, permitting the clear visualization of the structures of the eye at any depth."[1]
Ophthalmoscopes were developed by Helmholtz in 1850.[2]
The first opthalmoscopes were magnifying mirrors, placed over the examiner's eye and illuminated by an external light source. Modern opthalmoscopes contain a light source. General-purpose opthalmoscopes may be built as viewing heads that can be interchanged with otoscopes and other viewing instruments, using the same handheld power supply, which serves as the handle.
References
- ↑ Anonymous (2023), Ophthalmoscope (English). Medical Subject Headings. U.S. National Library of Medicine.
- ↑ Walker HK (1990). “The Origins of the History and Physical Examination”, Walker HK, Hall WD, Hurst JW: Clinical methods: the history, physical, and laboratory examinations, 3rd. London: Butterworths. ISBN 0-409-90077-X.