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Tholometer
PHOTOGRAPHIC EQUIPMENT AND CAMERAS
lantern slide
Dallos, Josef
c.1933
glass
overall: 120 mm x 89 mm x 3 mm

Glass lantern slide to illustrate a hand-drawn diagram by Dallos of his 'Tholometer', for assessing the sag of the corneal zone of a hard contact lens.


2017.150

Transferred from the former Museum and Library of Optometry, Aston University / Gift of the family of the late Anthony G. Sabell FCOptom, 2016



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