Actually, a decently sized amount of people have Central Heterochromia and neither is it very rare to have Sectoral Heterochromia. As for the numbers, I don't know the exact percent.
My son has sectoral heterochromia. I just found out there's a name for it! I used to say he was from outer space! I have central heterochromia.
I also have sectoral heterochromia. I found out when I was 8 and since then, I have tried to find out everything about it! I don't have any idea why I have it though because both of my parents have normal eyes. My mother has grown eyes and my father, hazel. I have brown eyes, but my sectoral heterochromia eye has hazel in it too. I don't have any family members at all that have sectoral or central heterochromia.Sometimes it doesn't make sense.
Only about 1percent of the world has sectoral heterochromia, but I am not sure about the other types.
About 1/5 (19%) of the world's population.
Rough estimates place it around 20% or about 1.5 billion people
1804
31,695,498 as of jan 2012
Heterochromia is a condition where one eye's iris is a different color than the other eye's iris or one part of an eye's iris is a different color than the rest of the same eye's iris. Heterochromia is more common in dogs and cats than it is in humans. It can be acquired genetically or by an injury or inflammation.
Forty percent of the worlds population have pets at home.
Asia is home to about 55% of the worlds population.
15%
god, and jesus
5.2 billion people
0-0
About 40 percent
The population of Trion Worlds is 200.
The population of Cyan Worlds is 2,005.
The population of Cyan Worlds is 40.
Realtime Worlds's population is 200.
Unknown Worlds Entertainment's population is 6.