Odd-Eyed Cat
It is called Heterochromia. Heterochromia is a result of the relative excess or lack of melanin (a pigment). It may be inherited, due to genetic mosaicism, or due to disease or injury.
Look Into My Eyes
This different look in eyes gave us a Armenian photographer Suren Manvelyan. I do not know whether to tell you “enjoy”, because this is somehow bizarre;). There are also human and animal eyes in these pictures.