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Dr Pray's Astigmatic Letters Chart No 1954
TEST CHARTS
astigmatism test
American Optical Co
North America: USA, Massachusetts, Southbridge
c.1947
cardboard; wood; glass
chart: 455 x 280 mm; frame: 548 x 370 mm
2000.47
TEST CHARTS
astigmatism test
American Optical Co
North America: USA, Massachusetts, Southbridge
c.1947
cardboard; wood; glass
chart: 455 x 280 mm; frame: 548 x 370 mm
Domiciliary astigmatism test chart consisting of four lines of equally-sized letters made up of differently sloping lines. Metal-reinforced suspension ring. Mounted and glazed in a modern cherry wood frame.
2000.47
Gift of Mr John Redwood, 2000