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Model Practice Eye
TEACHING AIDS
practice eye
Early 20th c.
metal; brass; glass; paper
overall: 70 cm x 54 mm x 50 mm

Teaching aid consisting of a round black metal stand bearing a short cylinder in two parts. One part features a 180 degree scale and viewing window aperture (and, internally, two metal rings). The other part, secured by a spring contains a numerical chart. Double drop cell before lens. Base features two screw holes for possible bench-mounting.


2010.131

Gift of Mr David G. Randall FCOptom, 2010



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