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There has been much controversy as to whether there are sex-related differences in human color vision. While previous work has concentrated on testing the central visual field, this study compares male versus female color vision in the near peripheral retina. Male (n = 19) and female (n = 19) color normal observers who exhibited no significant differences either in the midpoints or the ranges of their Rayleigh matches were tested with a color matching paradigm. They adjusted hue and saturation of a 3° test spot (18° eccentricity) until it matched a 1° probe (1° eccentricity). Both groups demonstrated measurable shifts in the appearance of the peripheral color stimuli similar to those that have been previously reported. However, females showed substantially less saturation loss than males (p &lt; 0.003) in the green-yellow region of color space. No significant differences were found in other regions of color space. This difference in the perceived saturation of color stimuli was minimally affected either by the inclusion or exclusion in the analysis of potential heterozygous female carriers of deutan color vision deficiencies. We speculate that this advantage of female over male color vision is conferred by M-cone polymorphism.

Sex-related differences in peripheral human color vision: A color matching study