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Abney's Pellet Test (Oliver's Modification)
OPTOMETRIC INSTRUMENTS
visual field test
Wall & Ochs
North America: USA, Pennsylvania, Philadelphia
c.1925
wood; glass; ivory; cardboard

Coloured beads test. Ivory beads contained within round hardwood case with screw-on lid and round glass window. Outer cardboard box (broken).


1999.123

Gift of Dr J.M.L. Howat, Hon FCOptom, 1999



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