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.
When Does Eye Color Change? Typically, you'll see the biggest change in the first 6 to 9 months of life, Dr. Moorjani says. Over several weeks or months, you may notice your baby's eyes getting darker. The change is so gradual that you may not notice until, one day, the baby wakes up and surprises you with a different eye color!