I know that we have heterochromatic eyes already, but what if we were to also have sectoral heterochromatic eyes as another variation for more eye colors? It's pretty much when the eyes are a certain color but then have splotches of a completely different color on the irises. For example:

Brown Eyes with Blue Sectoral Heterochromia


Blue Eyes with Green Sectoral Heterochromia


Pasha suggests: It could be a mutation!
Raiven suggests: It could be a mutation, but also the eye colors could be layered! For example, blue as the 1st transparent layer (base), and green as the 2nd (overlay), to allow for a eye color combination!

None of these images belong to me :D!

Some pictures whipped up by Liodenners:
Brown and Blue Eyes By Shaska (#10801)
Blue and Green Eyes By Shaska (#10801)
Blue and Green Eyes By LupineEyes [Raiven] (#40605/14)