and the tear gland in that third eyelid can become blocked in dogs (and rarely in cats). This gland will then swell and pop ...

Cherry eye in dogs is the term used to describe a prolapsed third eyelid gland (also called the nictitating membrane), which appears as a red swelling at the inner eye corner. A cherry eye may be ...

Functions of the third eyelid According to IFLScience, the third eyelid protects the eye from debris and helps to spread ...