August 30, 2010
Heterochromia Iridium is relatively rare for humans including, but includes common in some animals such as horses, cats, and some species of dogs.
Heterochromia Iridium allegedly as a result of a change in one of several genes that regulate eye color.
Heterochromia Iridium can also be a descendant, although trauma and certain types of medications can also lead to increased or decreased pigmentation in one iris. Some types of medical syndromes, such as Waardenburg syndrome, also can cause a person to have two different eye colors.
Eye color is determined by the amount of melanin, a dark brown pigment, contained in part of the eye called "IRIS".
Blue eyes are caused by the small amount of melanin, while brown eyes showed iris with a lot of melanin content.
People with hair and skin color is darker, has more melanin, so they have brown eyes, while people with hair and skin color is paler, has a smaller amount of melanin that usually have a lighter eye color.
When an individual has a different amount of melanin in each iris of it in their eyes, then their eyes will have a different color. This is called Heterochromia Iridium.
Examples of Heterochromia Iridium in humans and animals: