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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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Pelli-Robson Contrast Sensitivity Chart 7002251 - Instructions
Clement Clarke; Haag-Streit International
1988
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Clement Clarke; Haag-Streit International
1988
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Pelli-Robson Contrast Sensitivity Test recording chart
Clement Clarke International Ltd; Metropia Ltd
Post 1988
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Clement Clarke International Ltd; Metropia Ltd
Post 1988
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