Wing test set, 1920-1945.

Wing test set, 1920-1945.
2 9 c m
40cm
actual image size: 32cm x 21cm

Description

Manufactured by Thedore Hamblin Ltd, England. The wing test is designed to test for any imbalance in binocular vision, such as a 'lazy eye', or a strabismus, or squint.

© Science Museum / Science & Society Picture Library

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