The Roth 28-hue test.
The Roth 28-hue test, first described in 1966, uses every third color cap from the Farnsworth-Munsell 100-hue (85-color-cap) test. Protans, deutans, and tritans exhibit slightly different confusion axes on the Roth 28-hue test and the Farnsworth D-15 test. These axes are illustrated on a CIE chromaticity diagram. The little-used Roth 28-hue test may be a good compromise between the D-15 and 100-hue tests, but clinical trials for verification are needed.
D000293:Adolescent; D000328:Adult; D002648:Child; D003119:Color Perception Tests; D003117:Color Vision Defects / Q000175:diagnosis*; D005069:Evaluation Studies as Topic; D006801:Humans; D008875:Middle Aged; D009896:Optic Atrophy / Q000175:diagnosis