To better understand Heterochromia, we should first break down the word itself. Hetero refers to different and chromia refers to color. So, we can say that a person diagnosed with Heterochromia has two different colored eyes. A person with Heterochromia could have a blue eye and a green eye or a green eye and a brown eye, for example. Heterochromia can also be referred to as Heterochromia Iridis or Heterochromia Iridum. Both Iridis and Iridum simply refer to the iris which is where melanin pigment is present and where your eye color is.You may be wondering what melanin has to do with our eye color. The amount of melanin present in the eye determines the color. If your eyes are blue, for example, you have less pigment than a brown eyed person. While two different eye colors may seem like a problem, it really is not. It is not considered a disease and should not have any effects on a person's vision. Do you or someone you know have Heterochromia? What about your pets? Tell us in the comment section below!