Tritan color vision defects have been found in four individuals of a five member family, revealing an autosomal dominant mode of inheritance with a variation of test results within the family. Three males have been observed to be carrying both inherited tritan and deutan defects. Several popular color vision tests are shown to differ in the ability to detect color defective individuals. Arrangement color vision tests failed to detect deutan defects and various plate tests are solely designed to screen for red/green defects. Primary interest was given to those standard tests used in the cinical setting.
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