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Cataract Spectacles
cataract spectacles
19th c.
steel; shell
overall: 21 x 110 mm

Cataract spectacles. Blued steel frame. Arched bridge. Centre joints. Thin straight sides with bulbous ends. Oval eye rims and lenses surrounded by shell Martin's Margins plus auxiliary metal occluders hinged to the sides. Left eye has simple occluder. Right eye has occluder with 12mm stenopaeic slit.


BOA Purchase, 1937

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