Dr. Richter said that it actually depends on the cat's breed, age, and coat color. "Siamese cats tend to have a yellow shine and white cats with blue eyes usually glow red," he said.

Niu Nai, which translates from Mandarin to "Milk," is a sweet black cat with the biggest, most loving eyes you've ever seen — and the cool part? One's blue, and one's yellow. Although Milk's ...

Cats are often lauded for their many amazing abilities, but the feline's fascinating eyes ... white was until relatively recently a long-standing subject of debate More Domepitipat/Getty Images ...