Snellen's test type, United Kingdom, 1901-1930

Made:
1901-1930 in United Kingdom
Snellen's test type for distance, card, British Sight testing in the 1930s

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Snellen's test type for distance, card, British
Science Museum Group
The Board of Trustees of the Science Museum

Sight testing in the 1930s
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