Green eyes are a rare and fascinating trait that has captivated both scientists and the general population for centuries. Unlike blue or brown eyes , which are primarily determined by the amount of melanin pigment in the iris, green eyes require a specific combination of genes and mutations. At the core of green eyes is the presence of a specific allele that affects the production and distribution of melanin in the iris. Melanin is responsible for the pigmentation of the eyes , hair, and skin ... "The development and rarity of green eyes are influenced by intricate genetic interactions," an expert told Newsweek. Green eyes are also low on melanin, but in addition they contain lipochrome, a yellowish, fat-soluble pigment. Lipochrome is also found in things like butter, eggs, and corn. So a little melanin, some lipochrome, and a cool light dispersing scattering called the Tyndall Effect combine to produce those rare green eyes ! Green eyes are the rarest gem of human genetics, found in only 2% of the global population. However, there is more than one type of green eye , and its shades and depths vary greatly. Today, we will explore the science behind green eyes and help you identify which type of green eyes you have.