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Home Made Heterophoria Test
ORTHOPTIC INSTRUMENTS
heterophoria test
Europe: United Kingdom
Mid-Late 20th c.
cardboard; thread; plastic
overall: 79 mm x 153 mm

Home-made ophthalmic instrument comprising black paper-covered rectangular panel of cardboard overwritten with crossed lines of letters in white, with a green thread plumbline hanging from the lower edge, attached to a light brown plastic button.


2015.505

Gift of Mr Jeremy Cohn in memory of Mr Norbert Cohn FCOptom, 2014



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