Snellen's test type, United Kingdom, 1901-1930
- Made:
- 1901-1930 in United Kingdom
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LicenseThis image is released under a CC BY-NC-SA 4.0
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Buy this image as a print
BuyLicense this image for commercial use at Science and Society Picture Library
LicenseSnellen's test type for distance, card, British
Science Museum Group
The Board of Trustees of the Science Museum
Science Museum Group Collection
© The Board of Trustees of the Science Museum
Snellen's test type for distance, card, British, early 20th century
Located at the back of this display is a chart of letters used to test a person’s sight at various distances. With good vision, the patient should be able to read the letters at a distance of six metres.
The chart was developed in the 1850s by Hermann Snellen (1834-1908), a Dutch ophthalmologist, and is still used today. The letters, from largest to smallest, are all a precise shape and size. The board is shown here in a display of sight testing in the 1930s.
Details
- Category:
- Ophthalmology
- Object Number:
- 1977-627/25
- Materials:
- card, paper (fibre product), textile and metal (unknown)
- Measurements:
-
overall (lying flat): 23 mm x 317 mm x 564 mm, 0.46 kg
- type:
- snellen test types
- credit:
- Spread Eagle Antiques
