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The Landolt ring stimulus employed by the CAA test. D is the diameter... | Download Scientific Diagram
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BS EN ISO 8596:1996 - Visual acuity test types. Specification for Landolt ring optotype for non-clinical purposes (British Standard)
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Intermediate Visual Acuity Chart with Landolt Cs, 80cm | Intermediate Vision Tests | Visual Acuity | VISUS webshop
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