![]() ![]() ![]() Bilaterally symmetrical (binocular) scleral redness or whiteness provided anchorage points for ratings, with ratings for bilaterally asymmetrical (monocular) redness or whiteness falling between them there was no unique effect of asymmetry. Individuals with binocular and monocular redness were rated as sadder, less healthy, and less attractive than those with untinted control sclerae, with ratings corresponding to the degree of redness or whiteness. Building upon previous research, this study further defines the details of the scleral color display and contributes to the more general issue of facial and body symmetry, predictors of phenotypic condition and genotypic quality that are of interest to evolutionary theorists. The present study examines the effect of the asymmetry of binocular scleral redness on perceived sadness, healthiness, and attractiveness by contrasting ratings of images of individuals who had one, both, or neither sclera reddened by digital editing. Scleral color, primarily redness, provides cues of socially and biologically significant information about an individual. Among primates, only humans have the white sclerae that provide the ground necessary to display their own color and that of the overlying conjunctiva. Some companies ring true consistently for seeking the best binoculars for stargazing. ![]()
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