A cat's third eyelid, or nictitating membrane, is typically not visible unless there is an issue. Common causes for the appearance of the third eyelid include sleepiness, sedation, or medical ...

Felines have a third eyelid (nictitating membrane, nictitans, haw) arising from the corner of the eye nearest the nose, which is a white to pale pink pliable, thin layer of conjunctival tissue located ...

Dear Dr. Fox: I adopted two cats from a shelter in July. The vet there gave them a clean bill of health. Later, I took them to my own vet and was told the same. Over time, I noticed that Jay's "third ...

Q Our terrier is now a little over a year old, and while we have yet to get him neutered, we are concerned about something called his third eyelid in his left eye, which has a rip in it after our cat ...

Editor’s Note: Healthy Paws is a column sponsored and written by the owners of Clarendon Animal Care, a full-service, general practice veterinary clinic and winner of a 2017 Arlington Chamber of ...

University of Bristol provides funding as a founding partner of The Conversation UK. Our family dog used to have a rather noticeable extra eyelid that became especially apparent when he dozed off, ...