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Bishop Harman's Diaphragm Test
ORTHOPTIC INSTRUMENTS
diaphragm test
Gowllands Ltd
Post 1931
metal

Black metal rod with chrome chin rest and fold-out wooden handle with chrome collar stem. Adjustable aperture with ocular base line scale and ocular poise scale (both in mm). Fixation target holder containing printed piece of paper.


1999.3068

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thumbnail Bishop Harman's Diaphragm Test
Gowllands Ltd
Post 1931
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