Which anatomical term refers to the fold of skin that covers the lacrimal caruncle located at the medial canthus?

The plica semilunaris is the correct term for the fold of tissue that covers the lacrimal caruncle at the medial canthus of the eye. This anatomical structure is a small fold of conjunctival tissue that has a crescent shape and plays a role in the eye's anatomy by providing protection to the lacrimal caruncle, which contains glands that contribute to tear production and drainage.

It also serves as a remnant of the nictitating membrane found in some animals. Understanding this structure is essential in veterinary ophthalmology, as it can be involved in various clinical conditions and is an important landmark during examinations and surgical procedures.

The other terms refer to different anatomical parts. The palpebral conjunctiva is the part of the conjunctiva that lines the inner surface of the eyelids, but it does not specifically refer to the fold over the lacrimal caruncle. The orbital rim is the bony edge surrounding the eye socket and does not pertain to the fold of skin. Caruncular tissue identifies the tissue of the lacrimal caruncle itself but does not refer to the fold that covers it. Thus, plica semilunaris is the precise term for the fold of skin in