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Examples of possible results from the Farnsworth Dichotomous Test for Color blindness, Panel D-15 and the Lanthony’s Desaturated 15 Hue Test (a) perfect arrangement or normal colour vision and (b) arrangement showing defective colour vision lying along a tritanopic direction. Normal values for the C-index (confusion axis) and S-index (polarity of an individual’s pattern of cap errors) are included.
