Cats with Heterochromia, a condition where each eye is a different colour.
Complete heterochromia is seen often in animals such as cats and dogs. It almost always involves the affected eye appearing blue in color. It happens in a white spot where melanin is absent – the cat species which seem to be affected are the Turkish Van and Angora. The odd-eyed cats tend to be white or mostly white and with one normal eye and one blue eye – altogether very striking.