Why are a cat's eyes covered with a white film? - briefly
A cat's eyes may appear covered with a white film due to the presence of a thin membrane called the nictitating membrane or "third eyelid." This membrane serves as a protective shield, helping to keep the eye moist and free from debris.
Why are a cat's eyes covered with a white film? - in detail
The white film that sometimes covers a cat's eyes is typically due to a condition known as "nuclear sclerosis." This is a normal, age-related change in the lens of the eye and is not a sign of disease or illness. As cats age, the proteins within the lens start to clump together, creating a cloudy appearance that can obstruct light from entering the eye. While this condition does not cause discomfort or pain for the cat, it may result in slightly decreased visual acuity and increased sensitivity to glare. It's important to note that nuclear sclerosis is distinct from cataracts, which are often associated with more severe vision loss and can be treated surgically. Regular veterinary check-ups can help monitor the progression of this condition and ensure overall eye health in aging cats.