A variable that is capable of indicating one\u27s cognitive and motor capacities has been the dream of many researchers. Until recently however, no researcher has seriously considered an independent variable that is obvious among all people regardless of race or culture. This variable is eye color. This paper is a review of the experimental literature in this field and covers many areas including sociability, perception, learning, athletic abilities, and a few medical anomalies. Several alternative hypotheses are also offered as reasons for the obtained correlations. These ideas include culture, learning, and environment. Two other hypotheses are also presented to explain why eye color does play an important role in determining one\u27s response to environmental stimuli. These ideas include a genetic and physiological basis. It is the hope of this author that this review may stimulate other researchers to perform more experiments in the area to help determine the amount of influence that they eye color has in individual responses to the environment