What is the function of the caruncle?

The caruncle is a small, fleshy growth located at the medial canthus of the eye, where the eyelids meet. Its primary function is to produce and secrete mucus, which helps keep the eye moist and aids in the lubrication of the tear film. Additionally, the caruncle may play a role in protecting the eye from debris and contributing to the overall health of the ocular surface.