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Astigmatism Chart
TEST CHARTS
astigmatism test
Late 20th c.
perspex
overall: 242 mm x 203 mm

Astigmatic test chart consisting of fan chart and revolving block chart mounted below to the same opalescent Perspex board.


2015.396

Gift of Miss E. S Gould, FCOptom and Dr Michael Crossland, MCOptom, 2014 in memory of Janet Silver



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