P-11 Study on the Perception of Color between Two Groups with Different Iris Colors

To clarify the differences in the perception of color between two groups with different iris colors (brown and blue-green), we measured color discrimination ability by the 100 hue test under an illuminance of 500 or 30 lx. The total deviation score at 30 lx did not significantly differ between the two groups, but that at 500 lx was lower in the brown iris group, suggesting that color discrimination was easier at 500 lx in the brown iris group. In the blue-green iris group, hue discrimination was more difficult in the region from green to purplish blue compared with the brown iris group under an illuminance of 500 lx, and the spectral luminous efficiency decreased in the blue region in the light condition. In both groups, color discrimination in the red region was low at 30 lx, showing significant differences between 30 lx and 500 lx. In the brown iris group, the discrimination ability in the blue region was significantly lower at 30 lx than at 500 lx.