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.
Eye disorders such as hypnosis also changes the eye color. When they have infected the eye, they cause the iris to change the color, eye treatments such as herbal eye drops can also change your eye color. When you have undergone eye surgery, your eyes also changes the eye color. Eye surgery destroys the thin brown layer that surrounds the pupil of the eye.