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Britothalmic Rule
OPTOMETRIC INSTRUMENTS
pupillometer
S. Pulzer & Son Ltd
Europe: United Kingdom
1931
metal
overall: 31 mm x 178 mm

Pupillary distance gauge. Black-painted metal. Wide arched nasal notch between two apertures, the left of which has two fixed pointers and the right of which has a vertical wire on a shutter that slides along a millimetre scale.


2015.325

Gift of Mrs Jean C. Lawrence, 2015



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