The variation in color in the same pet is called heterochromia and can affect both eyes, only one, or a part of the iris. While it may be a beautiful aspect to admire, it occurs due to the lack of maturation or absence of melanin pigment granules in the iris stroma.
Similar to humans, the eye color of pets is determined by two main pigments: melanin and lipochrome. Based on genetic inheritance, these two pigments combine to define the eye’s shade. Although it may seem somewhat startling, heterochromia in animals and humans is nothing more than an anatomical condition resulting in one eye being a different color. So far, it doesn’t affect visual capacity unless it’s caused by an underlying disease.
Heterochromia: How It Can Affect Dogs’ Health
Some diseases are paradoxically aesthetic and not as bad as commonly thought. You’ve probably walked down the street and seen a dog (although humans can also suffer from the condition) with a different hue in each eye. That’s heterochromia. It’s a condition in which the irises of the eyes are noticeably different in color. The color difference is a genetic anomaly that doesn’t require any intervention and, best of all, poses no danger to the affected individual, giving your pet a unique touch that few others of its breed will have.
If your dog or cat has had heterochromia since birth, you don’t need to worry. Their vision functions perfectly normally, and they don’t require any special care unless the change in hue occurs later in life due to trauma, infections, or other factors affecting that area.
Some studies have shown a relationship between heterochromia and deafness, especially in breeds of white cats with blue eyes or in dogs such as Dalmatians, Australian Shepherds, English Setters, Boston Terriers, Siberian Huskies, English Shepherds, and English Bulldogs. It’s a visual beauty that never fails to evoke nostalgia.
This story was originally published in Spanish in Ecoosfera.
