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Polatest - Vision Testing Instrument
test chart
Europe: West Germany
metal; plastic; fibreglass; glass
overall: 645 mm x 645 mm x 245 mm

Wall-mounted test chart comprising mechanically revolving tests for subjective monocular and binocular refraction, including positive polarising tests, with corresponding visual function tests and visual acuity tests. White fibreglass outer housing with central square aperture. Includes separate grey and black cables.


Gift of Dr Michael Johnson FCOptom, and Hayley Johnson MCOptom, 2014

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