People With Blue Eyes Have A Higher Alcohol Tolerance

Eye color is a polygenetic, partially sex-linked trait, meaning that it is controlled by multiple genes, one of which is located on the X-chromosome. 

The color of the eyes is determined not by different pigments but by the number and size of melanin particles in the layers of the iris. More melanin makes the eyes appear darker, moving from blue to grey, green, hazel, brown, and black.

Research has shown eye color to be related to domains that include perception, reaction time, motor skills, personality, and physiological reactivity.

The study was designed to examine the link between eye color and alcohol. It was hypothesized that among Caucasians, whose eyes range from very light to very dark, light-eyed individuals would drink more alcohol and more often exhibit alcohol abuse than dark-eyed individuals.


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