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Barrett Relative Accommodation Stereoscope
ORTHOPTIC INSTRUMENTS
stereoscope
R. Archer & Sons Ltd
Europe: United Kingdom
c.1960s?
metal, plastic
overall: 198 x 250 x 122 mm

Stereoscopic orthoptic device, adapted by an individual optician for use as a fusion test. Binocular prismatic eyepiece of black metal. U-shaped cheek rest. White metal graduated bar. Aluminium/Tin (?) home-made sliding card holder with typewritten 'X' markings and two round apertures. Yellow plastic handle set at an angle.


2002.54

Gift of Mr Philip Freeman, FCOptom, 2002



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