SEVERAL tests have been devised to detect abnormalities of color perception. The easiest, and the most convenient for mass examination, are those using the pseudoisochromatic plates, of which the Ishihara test is one. Owing to the ease with which it can be made, this test has been used frequently to determine the incidence of defective color vision in various groups of people. We are not aware of any such study having been made among Filipinos.
METHOD AND MATERIAL
This study was conducted on students seeking admission to the University of the Philippines. In order to avoid their faking results, it was made clear that the results of the test would have nothing to do with their admission to the university. The 16 plate edition of the Ishihara test book, printed in Tokyo, Japan, in 1932, was used. The plates were numbered consecutively from 1 to 13 (the last 3 plates,
NOLASCO JB, RODIL D. RESPONSES TO THE ISHIHARA TEST FOR COLOR PERCEPTION. Arch Ophthalmol. 1949;41(1):20-23. doi:10.1001/archopht.1949.00900040023003