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Stability Test
ARCHIVAL ITEMS
instructions
Europe: United Kingdom
Mid 20th c.
paper
overall: 215 cm x 278 mm
2016.19
ARCHIVAL ITEMS
instructions
Europe: United Kingdom
Mid 20th c.
paper
overall: 215 cm x 278 mm
Chart for use during stability testing, plotting pupillary distance against septum distance to give the increase in binocular field. Printed in black on one side only of a single sheet of white paper.
2016.19
Gift of Mr Jeremy Cohn in memory of Mr Norbert Cohn FCOptom, 2014