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.

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