What is the film over a cat's eyes called? - briefly
The thin layer of tissue that protects a cat's eyes and helps regulate light intake is known as the third eyelid or nictitating membrane. This structure is unique to certain animals, including cats, and it plays a crucial role in maintaining eye health.
What is the film over a cat's eyes called? - in detail
The thin, transparent membrane that covers a cat's eyes is known as the "nictitating membrane" or "third eyelid." This structure serves multiple purposes in feline physiology and behavior.
The nictitating membrane is a protective layer that can be voluntarily closed over the eye to provide additional defense against irritants, debris, or potential injuries without obstructing the cat's vision. It operates independently of the regular eyelids, allowing cats to maintain clear sight while still benefiting from this extra layer of protection.
Additionally, the nictitating membrane plays a role in maintaining eye health and hydration. It can help distribute tears evenly across the surface of the eye, which is crucial for keeping the cornea moist and preventing dryness or discomfort. This mechanism helps ensure that cats' eyes remain in optimal condition, supporting their overall visual acuity.
In summary, the film over a cat's eyes is called the nictitating membrane, and it serves essential protective and hydrating functions for felines.