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19th century box trial frames

19th century box trial frames

C002/5130

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Credit

MARK THOMAS / SCIENCE PHOTO LIBRARY MARK THOMAS / SCIENCE PHOTO LIBRARY

Caption

This set was invented by George Cox in 1838. A trial frame is used to determine an individual's lens prescription for a pair of glasses. Different ones are tried on until the correct set is found. Photographed at the Royal College of Ophthalmologists, London, UK.

Release details

Model release not available. Property release not required.

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