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.
Understand how makeup can alter eye color. You cannot use eyeshadow to make blue eyes look brown, and vice versa. You can, however, use eyeshadow to enhance the color you already have. Depending on the eyeshadow color you use, you may be able to make your eyes appear brighter, duller, or more pale in color.