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.
Why Do Babiesâ Eyes Change Color? When we talk about baby eye color, weâre referring to the color of the irisâthe part of the eye behind the cornea that controls the size of the pupil to let light in. There are two reasons why baby eye color changes: genetics and melanin. Genetics. The genes babies inherit from both parents play a role in determining their newborn eye color. In fact, experts say there are approximately 15 genes that are responsible for baby eye color, but twoâOCA2 and HERC2âare the most predominant.