Why has a cat's eye color changed? - briefly
A cat's eye color may change due to age, genetics, or health conditions such as inflammation or disease.
Why has a cat's eye color changed? - in detail
A cat’s eye color can change due to several biological and environmental factors, primarily influenced by genetics, age, and health conditions. Kittens are often born with blue eyes because melanin, the pigment responsible for eye color, has not yet fully developed in their irises. As they grow, typically between 6 to 12 weeks of age, melanin production increases, leading to a gradual shift in eye color. This process is genetically predetermined, and the final eye color is usually established by the time the cat reaches adulthood. Certain breeds, such as Siamese or Burmese cats, are genetically predisposed to retain blue or aqua-colored eyes due to specific genetic traits. However, sudden or unusual changes in eye color in adult cats can indicate underlying health issues. Conditions such as uveitis, glaucoma, cataracts, or trauma to the eye can cause discoloration, cloudiness, or a noticeable shift in hue. Additionally, diseases like feline leukemia virus (FeLV) or hypertension can affect eye pigmentation. Nutritional deficiencies or exposure to certain toxins may also contribute to changes in eye color. If a cat’s eye color changes unexpectedly, it is essential to consult a veterinarian to rule out any serious health concerns. Environmental factors, such as prolonged exposure to sunlight, can sometimes cause subtle changes in eye pigmentation over time, though this is less common. Overall, while some changes in eye color are natural and harmless, others may signal the need for medical attention to ensure the cat’s well-being.