How Does Someone Get Two Different-Colored Eyes?
The medical term for mismatching eye colors is heterochromia iridium. Brown eyes are rich in melanin, whereas blue eyes lack high levels melanin. Many babies are born with blue eyes and develop melanin, causing their eyes to darken.
Key Facts In This Video
Most babies are born with blue eyes that can darken within the first three years. (0:10)
Eye color is determined by the genetic material of a child's parents. (0:27)
People having different colored eyes is usually due to a problem with pigment transport during development. (0:38)