This image is released under a CC BY-NC-SA 4.0 Licence
Buy this image as a print
BuyLicense this image for commercial use at Science and Society Picture Library
LicenseTest type wall charts (3, Snellen), made by Storey and Co
Science Museum Group Collection
© The Board of Trustees of the Science Museum
Test type wall charts (3, Snellen), made by Storey and Co.,Leeds, English, 1930-1970
These charts of letters used by an optician to test a person’s sight at various distances. Such charts are perhaps the most iconic objects in sight testing. A patient with good vision should be able to read the letters at a distance of six metres. The original sight charts were developed in the 1850s by Dutch ophthalmologist Hermann Snellen (1834-1908). The letters, from largest to smallest, are all a precise shape and size. Such charts are still commonly used.
Details
- Category:
- Ophthalmology
- Collection:
- Sir Henry Wellcome's Museum Collection
- Object Number:
- A608276
- Materials:
- cardboard
- Measurements:
-
overall: 511 mm x 306 mm
- type:
- snellen test types
