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Individuals with color vision deficiency should see a different figure from individuals with normal color vision.;Vanishing plates: Only individuals with normal color vision could recognize the figure.;Hidden digit plates: Only individuals with color vision deficiency could recognize the figure.;Diagnostic plates: Intended to determine the type of color vision deficiency (protanopia or deuteranopia) and the severity of it.;Tracing plates: Instead of reading a number, subjects

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