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H.M. Factory Inspectorate Test Card for Central Vision F.313
Ministry of Labour and National Service
October 1957
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Ministry of Labour and National Service
October 1957
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Lea-Screener - Contrast sensitivity test and Visual Acuity Chart featuring LH symbols
Precision Vision; Hyvarinen, Lea
Late 20th c.
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Precision Vision; Hyvarinen, Lea
Late 20th c.
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