Diamond test type for astigmatism

Diamond test type for astigmatism, Orthops, card, British

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Diamond test type for astigmatism, Orthops, card, British
Science Museum Group
© The Board of Trustees of the Science Museum

Diamond test type for astigmatism, Orthops, card, British, early 20th century

Details

Category:
Ophthalmology
Object Number:
1977-627/26
Materials:
card, paper (fibre product) and metal (unknown)
Measurements:
overall (lying flat): 18 mm x 346 mm x 337 mm, .466 kg
type:
test types
credit:
Spread Eagle Antiques