Heterochromia in eyes is when a person(animal) has 2 different collored eyes.
I have Central Heterochromia bc the central zone of my iris is a different color than the mid zone.

http://en.wikipedia.org/wiki/Heterochromia

A couple of people with Heterochromia

Kate Bosworth
http://1.bp.blogspot.com/_q4ng3h9jfgI/SWimmgmgL5I/AAAAAAAAA_g/FnwX0qMAM_A/s400/lois-lane-eyes.jpg
http://2.bp.blogspot.com/_q4ng3h9jfgI/SWimmVxyX_I/AAAAAAAAA_I/RVEPmWC7TxI/s1600/20050118kateboswo2.jpg
Michael Flatley
http://www.celticcafe.com/archive/People/flatley/King_of_Clubs/images/MF_King_of_Clubs_eyes.jpg
Max Scherzer
http://www3.allaroundphilly.com/blogs/delcotimes/ryanl/uploaded_images/max-787607.jpg
Jane Seymour
http://weblogs.newsday.com/entertainment/tv/blog/jane-seymour-395x298-queensoftvmoviesgallery.jpg
Kiefer Sutherland
http://www.mtv.com/shared/promoimages/movies/w/walken_christopher_supporting_actors/281x211.jpg
Sectorial Heterochromia
http://farm1.static.flickr.com/115/311760915_a5fae4f7a3.jpg?v=0
Central HeteroChromia
http://upload.wikimedia.org/wikipedia/en/3/34/Blue_greeny_yellow_eye.JPG
Complete HeteroChromia
http://upload.wikimedia.org/wikipedia/commons/6/60/Heterochromia.jpg

I always saw a lot of Husky's with 2 different colored eyes. I also didnt know that I had it to, partial but still.