snellen
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snellen |
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| navigate by keyword : 1862 acuity care chart determine different display each eye function hermann identify large letters measure measurement numbers optotypes person professionals psychometric psychophysical rows sensory several size smaller snellen symbols test threshold visual |
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| Illustration of a snellen eye chart |
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Stockphotos.ro (c) 2025. All stock photos are provided by Dreamstime and are copyrighted by their respective owners. |
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