RESUMEN
One hundred eighty-five male high school students of the University of the Philippines were tested with the Ishihara's Pseudoisochromatic plates and Farnsworth-Munsell 100 Hue test (FM 100).One hundred seventy-one passed both tests.Five failed the Ishihara but passed the FM 100.Five passed the Ishihara but turned out to be blue-yellow deficient by the FM 100 test.Four failed both test all of which were identified as having red-green color deficiency.The Ishihara test is a highly sensitive test useful for jobs requiring identification of red-green colors.After testing with the Ishihara, failures can be required to undergo testing with the FM 100 to remove false positives.The FM test can be utilized for jobs requiring identification of colors in the whole color spectrum and in detecting blue-yellow deficiencies,The test can also be used for color normals in jobs requiring a superior degree of hue discrimination.