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accommodation test; convergence test
Europe: United Kingdom
Mid 20th c.
overall: 230 mm x 460 mm x 85 mm
Binocular gauge to measure objective and subjective convergence as well as accommodation. White metal 40cm rule with black metal sliding target holder and screw to provide end-stop. Black metal swivelling hand-piece with black-painted wooden handle and amber-coloured ball face rests.
Gift of Mr John Dixon Salt FCOptom, 2020