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The color of the eyes is directly dependent on the pigmentationiris. The iris itself consists of two layers - ectodermal and mesodermal. The color of the eyes depends on the nature of the distribution of pigments between these layers. The outer layer of the iris of the brown-eyed man contains a melanin more than the iris of the owner of light eyes. The outer layer of the iris absorbs low-frequency light, and the reflected layer gives a dark, brown color. Moreover, the higher the concentration of melanin, the darker the eyes. Most often the owners of brown eyes live eithercloser to the equator, or to the north. This is explained by the fact that the dark light of the eyes more effectively protects from bright sunlight. Northerners also need protection, because sunlight, reflected from the snow, blinds no worse than the sun in the south. Glazes do not immediately turn brown. Often babies are born with light eyesand only to two or three years of their eyes become brown. It is to this age that a pigment of melanin is produced in the anterior layer of the iris. Eye color is an inherited trait transmitted from generation to generation. And brown color is a dominant feature. Scientists believe that the brown eye color was the main one for the distant ancestors of people living now, until about 10 thousand years ago one person had a mutation, which resulted in the color of his eyes becoming bright. It was this first blue-eyed man who passed his mutated gene to all generations of light-eyed people. The color of the eyes in a person can vary throughout life. This occurs not only in infancy, when the iris accumulates melanin, but also in old age, when the mesodermal layer loses its elasticity. The color of the eyes can change due to the disease, and also play with variations of shades depending on clothing, cosmetics and even the mood of a person.