Lens, a transparent structure that adjusts its shape as needed to focus the light rays Iris, the round, pigmented membrane that surrounds the pupil and contracts or expands to regulate the amount of incoming light ![]() ![]() Pupil, the circular membrane in the center of the eye that permits the entry of light from the environment The major structural and functional components include:Ĭornea, the transparent outer covering of the eyeball Overall, feline eyes function in the same way that human eyes function and are made up of the same components. Kern urges owners to keep an eye out for any behavioral or physical indications that a cat is having a vision problem and to report any such signs to a veterinarian without delay. And most of them are middle-aged or elderly cats whose vision loss has been progressing for years."Īs is true for virtually all threats to feline health, the earlier a cat’s vision problem is diagnosed, the more effectively it can be treated-unless, of course, the animal’s blindness has progressed irreversibly by the time it is noticed. "Most of these animals have eye disease as a primary disorder-they have no other health problems. "We see cats that are either blind or going blind several times a week," says Thomas Kern, DVM, associate professor of ophthalmology at Cornell University’s College of Veterinary Medicine. Unfortunately, these finely-tuned feline eyes are vulnerable to injury and a wide variety of diseases that can dramatically impair a cat’s eyesight or, in some cases, render a cat partially or totally blind. In most cases, early diagnosis and treatment can keep a cat from losing its eyesight, but it's important to look for signs of trouble and ensure your cat gets regular check-ups.Ĭats have developed several unique vision features during their evolution that enable them to see clearly indoors and out.
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