Cat Eye Injury Third Eyelid. If a cat third eyelid showing in one eye is observed, it could be some direct damage to this membrane. Other symptoms the appearance of your cat's third eyelids by themselves don't always mean there's some sinister underlying medical issue.
What is the third eyelid in a cat? Cats have evolved to hide signs of illness and pain. This medical condition occurs in both dogs and cats, although it usually affects younger animals.
For a cat, swollen eyes can mean immense pain and discomfort.
The cat’s gland hanging from the third eyelid in cats, also known as the “cherry eye”, indicates a prominent pink mass of cat’s eyelid.usually, the growth of the gland is anchored by a fibrous ligament. The third eyelid is typically retracted and not visible. This could be the result of trauma (a scratch to the eye) infection, increased pressure within the eye, a foreign body trapped under the eyelids, or inflammation within the eye. Flush the eye thoroughly (three or four times) with saline solution or plain water.