Child eye colour is more likely to change over time. Child eye color is decided by a substance known as melanin. Melanin is a dark pigment contained within the iris, the hierarchy that controls how a lot light is allowed into the eye. The color of the iris is decided by the quantity of melanin within the iris. The color of eyes is managed by three basic genes. Researchers perceive two of these genes very well and certainly one of them remains to be a little bit of a thriller. These genes manage the instruction of green, brown and blue eye color. Grey, hazel, and different combos are tougher to foretell