Even more surprising, “White cats have less melanin in their skin ... their white fur—also works on irises. The most common eye color in snowy-hued cats is greenish-yellow to gold.

Most kittens are born with blue eyes, which gradually change and reach their permanent color ... have two different colored eyes. This condition, known as heterochromia, is more common in white ...

The W gene, which gives white cats their coat color, can also cause abnormalities in the inner ear, leading to hearing loss.