Once in a while, you'll see a cat with a striking condition called heterochromia iridis, which means irises that are different colors. Also known as odd-eyed cats, these lovely kitties have two different colored eyes. They typically have one blue eye, and the other is either green, brown, or yellow.

This 'odd-eyed' cat with a genetic condition that makes her eyes different colors is stealing the internet's heart.

Niu Nai, the black cat whose name means "milk" in Mandarin, has become an Instagram star in China and beyond.

Cat With Multi-Colored Eyes Becomes Star On Instagram

See NiuNai with her daughter @thelittlemocho and grandson Michael in the picture bellow:

NiuNai with her daughter @thelittlemocho and grandson Michael
It’s hard to ignore the stunning, unusual beauty of a cat who has eyes that are each a different color. It’s even more unusual for a cat to have multiple colors in one eye, but they’re out there! No matter how the colors are spread, if a cat has multiple colors in her eyes it’s a result of a condition called heterochromia. And, don’t worry, heterochromia is not a medical condition. Cats with heterochromia experience no adverse effects, even with their vision.

See photos of some cats with different colored eyes:

photos of some cats with different colored eyes

photos of some cats with different colored eyes

photos of some cats with different colored eyes