Eye color is an inherited trait determined by multiple genes. These genes are sought by studying small changes … See more

A 1997 study of White Americans found that eye color may be subject to change in infancy, and from adolescence to adulthood.
17% of children experienced a change of eye color fr… See more

Almost all mammals have brown or darkly-pigmented irises. In humans, brown is by far the most common eye color, with approximately 79% of people in the world having it. Brown eyes result from a relatively hi… See more

The most important role of melanin in the iris is to protect the eyes from the sun's harmful rays. People with lighter eye colors, such as blue or green, have lessened protection from the sun, and so need greater prot… See more