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Worth-Black amblyoscope, 20th century.

Worth-Black amblyoscope, 20th century.
2 9 c m
actual image size: 32cm x 21cm


This device, manufactured by Weis, England, was used to train the eye so that it shares equally with the other eye in binocular vision, instead of one eye doing the bulk of the work. Amblyopia is the name for the condition where one eye is 'lazy', forcing the other to work harder.

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© Science Museum / Science & Society Picture Library

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