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About the limitation between a deffective color vision and a normal color vision Takuji Yamamoto 1 1Depertment of Ophthalmology, Yokohama University, School of Medicine. pp.161-167
Published Date 1959/2/15
DOI https://doi.org/10.11477/mf.1410206552
  • Abstract
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I tried this experiment in order to pursue the standard for screening color normals from color deffectives. 1185 students of a middle school were tested by Ishihara test (24 plates 1955) and American-Optical Hardy-Rand-Rittler test (1955), and among them 193 subjects were tested by Nagel anomaloscope. As its result, by means of the Ishihara test those who are under 5 points in the Number of plates mis-read are judged to be normal, between 6 and 7 points normal and deffective are mixed and those at 8 points or above are all judged to be defective.


Copyright © 1959, Igaku-Shoin Ltd. All rights reserved.

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電子版ISSN 1882-1308 印刷版ISSN 0370-5579 医学書院

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