<P> An odd - eyed cat is a cat with one blue eye and one eye 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 - colored cats, but may be found in a cat of any color, provided that it possesses the white spotting gene . </P> <P> The odd - eyed coloring is caused when either the epistatic (dominant) white gene (which masks any other color genes and turns a cat completely white) or the white spotting gene (which is the gene responsible for bicolor and tuxedo cats) prevents melanin (pigment) granules from reaching one eye during development, resulting in a cat with one blue eye and one green, yellow, or brown eye . The condition only rarely occurs in cats that lack both the dominant white and the white spotting gene . </P>

Cat has one blue eye and one green