Cute Cat with Green Blue Eyes

An odd-eyed cat is a cat with one blue eye and one eye of either green, yellow, or brown. This is a feline form of complete heterochromia, a condition that occurs in some other animals. The condition most commonly affects white-coloured cats, but may be found in a cat of any color, provided that it possesses the white spotting gene. There is a common misconception that all odd-eyed cats are born deaf in one ear. This is not true, as about 60%–70% of odd-eyed cats can hear. About 10%–20% of normal-eyed cats are born deaf or become deaf as part of the feline aging process. White cats with one or two blue eyes do, however, have a higher incidence of genetic deafness, with the white gene occasionally causing the degeneration of the cochlea, beginning a few days after birth. If a white kitten has any speck of another colour, the frequency of deafness is greatly diminished, even if the speck of colouration fades as the cat becomes more mature. It has been found that deafness is more likely to affect the ear on the blue-eyed side.