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.
In some patients, Xalatan may cause a gradual change in eye color by increasing the amount of brown pigment in the iris (the colored part of your eye). This change may not be noticeable for several months to years. This effect most commonly occurs in people with mixed eye color (hazel).