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simple optometer
OPTOMETRIC INSTRUMENTS
optometer
Early-Mid 20th c.
wood; metal; glass
overall: 50 x 296 x 32 mm

Optometer. Wooden square-sectioned rod and cylindrical eyepiece containing round +7.25 D lens. Eyepiece secured to rod by brass collar and a later period screw (probable handle missing). Test target missing.


2005.535

Gift of Mr Nigel J. Austin, FBOA, FSMC, 2005



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