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.
Question: What causes the iris of the eye to change color? For most of my life, my iris color in each eye was dark brown. When I was in my 50s, the color began to lighten. I'm now 62, and the iris color is hazel, a mix of brown and green.he fewer the granules, the lighter the eye color is. Babies are typically born with blue eyes due to a minimal amount of melanin pigment in the iris at birth. From 10 to 15 percent of the Caucasian population will see a change in their eye color as they age.