Cat Third Eyelid Black. Here are some signs that could indicate that your cat is suffering from an eye infection: In the pictures above, notice that the third eyelid also protrudes when you pull up the upper eyelid.
Other names for the third eyelid include the nictitating membrane, nictitans and haw. This wonderful adaptation moves from the inside corner of the eye to cover the front surface of the eyeball. The third eyelid cats have an inner, third eyelid, called a nictating membrane (also spelled nictitating), which serves to protect the eye from dryness and/or damage.when a cat is sick, the third eyelid will partially close which is a signal to get him to the vet immediately if other symptoms present.
The eyelid is considered to be such a section of the body for which a small blow is enough for the swelling.
Entropion is the turning in of the edges of the eyelid so that the eyelashes rub against the eye surface. Therefore, anything that affects the eyes, even if it seems minor, should not be ignored. The third eyelid is white or light pink. Hyperpigmentation is an excess of skin pigment common in cat's with this.