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contrast test; near vision test; distance vision test
Precision Vision; Hyvarinen, Lea
North America: USA, Illinois, Villa Park
Late 20th c.
overall (closed): 265 mm x 285 mm; overall (open): 532 mm x 285 mm
Paediatric test charts for testing visual acuity and contrast sensitivity using LH symbols. Large folding format printed in black, white and grey on four joined panels.
Gift of Miss E. S Gould, FCOptom and Dr Michael Crossland, MCOptom, 2014 in memory of Janet Silver