Mr. Kai Xiong Profile

Kai Xiong

at Zhejiang Univ

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Proceedings Article | 18 January 2005 Paper

Novel method for the quantitative measurement of color vision deficiencies

Kai Xiong, Minxian Hou, Guanrong Ye

Proceedings Volume 5630, (2005) https://doi.org/10.1117/12.572902

KEYWORDS: Color vision, Visualization, Colorimetry, Cones, Electrodes, Receptors, Retina, Absorption, Diagnostics, Astatine

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The method is based on chromatic visual evoked potential (VEP) measurement. The equiluminance of color stimulus in normal subjects is characterized by L-cone and M-cone activation in retina. For the deuteranopes and protanopes, only the activations of one relevant remaining cone type should be considered. The equiluminance turning curve was established for the recorded VEPs of the luminance changes of the red and green color stimulus, and the position of the equiluminance was used to define the kind and degree of color vision deficiencies. In the test of 47 volunteers, we got the VEP traces and the equiluminance turning curves, which was in accordance with the judgment by the pseudoisochromatic plate used in clinic. The method fulfills the impersonal and quantitative requirements in color vision deficiencies test.

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