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Bagolini Striated Glass Test (BSGT)
ORTHOPTIC INSTRUMENTS
binocular vision test
c.1983
glass; metal
each lens: 36 mm

Pair of trial lenses of polished plano glass with very fine parallel diffraction lines ground into the surface, then mounted within standard trial lens rims of white metal, with handles.


2017.735

Gift of Mr David Shannon MCOptom, 2017



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