Gullstrand ophthalmoscope arranged as a parallax refractionometer

Catalogue Number: 906
Gullstrand ophthalmoscope arranged as a parallax refractionometer
Category: Equipment
Sub-Category: Ophthalmoscope
Designer/inventor: GULLSTRAND, Allvar
Year Of Publication/Manufacture: c 1920
Time Period: 1900 to 1939
Place Of Publication/Manufacture: Jena, Germany
Publisher/Manufacturer: Carl Zeiss
Description Of Item: Gullstrand's reflex free ophthalmoscope adapted as a parallax refractionometer (optometer). L: 42.0cm x W: 34.8cm x H: 60cm
Historical Significance: Gullstrand demonstrated his table top instrument in 1911. It was designed to displace corneal and lens reflections from the field of view during ophthamloscopy and was based on earlier work of Schulten (1883) and Thorner (1895) , It was later modified by Henker about 1922 so it could be used as an objective optometer. This is an example for the Henke modification. Another example is held Cat No 2026. The instrument is detailed in Emsley:Visual Optics 2nd Ed, p245 (or 5th Ed p252). Refer Cat No 871 for manual for this instrument (in German). Allvar Gullstrand (1862 - 1930) was a Swedish ophthalmologist. He was professor (1894-1927) successively of eye therapy and of optics at the University of Uppsala. He applied the methods of physical mathematics to the study of optical images and of the refraction of light in the eye. He developed the Gullstrand reduced eye. He received the Nobel Prize in Physiology or Medicine in 1911.
How Acquired: Donated by Geo Rees Pty Ltd
Condition: Good but missing objective lens & test target
Location: Archive room. East wall Unit 2 Cupboard

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