This image is released under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 Licence
This image is released under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 Licence
Ophthalmoscope, by Ferrier, English.
Full view, graduated matt black perspex backgound.
Science Museum Group Collection
© The Board of Trustees of the Science Museum
Ophthalmoscope, by Ferrier, English.
Full view, opthalmoscope and lens alongside case.
Science Museum Group Collection
© The Board of Trustees of the Science Museum
Ophthalmoscope, by Ferrier, 56 Beresford Street, Camberwell, London, England, 1880-1900.
The ophthalmoscope is a simple, highly effective instrument used to view the interior of the eye. It was invented in 1851 by Herman von Helmholtz (1821-1894). Helmholtz reasoned an observer placing his eye in the path of light reflected from the back of a subject’s eye (through the pupil) could see the subject’s retina. Helmholtz used glass plates angled at 45 degrees to reflect sunlight into the eye. This example was made in England by instrument maker Ferrier. A ratchet mechanism rotates two wheels of lenses in front of a perforated mirror.
Details
- Category:
- Ophthalmology
- Object Number:
- A664762 Pt1
- Materials:
- brass (copper, zinc alloy), complete, glass and ivory
- Measurements:
-
overall (instrument): 174 mm x 42 mm 12 mm, 0.09kg
- type:
- ophthalmoscope
- taxonomy:
-
- furnishing and equipment
- tools & equipment
- ophthalmic equipment
- ophthalmic instrument
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Data in the title, made, maker and details fields are released under Creative Commons Zero
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