Barbara Marquand is a staff writer at NerdWallet, a personal finance website. Email: bmarquand@nerdwallet.com. Twitter: @barbaramarquand.
The eye may change color due to alteration of genes in the cells of the iris. This is because of your DNA factors in the body. The gene alteration can cause the eye to change color from brown to green and vise verse. There is no any explanation to the cause of the genes behaving in these manner. Prolonged exposure to the sun might also be another cause that made my eyes to change the color.
The colored part of the eye is called the iris, which has pigmentation that determines our eye color. Her eyes may be blue only temporarily; babies' eyes can change color if the brown pigment melanin develops as they grow. Human eye color originates with three genes, two of which are well understood. These genes account for the most common colors â green, brown, and blue.