Lacrimalfossa

The lacrimal fossa is an anatomical depression located in the frontal bone of the skull. It is situated in the superolateral part of the orbit, just below the supraorbital margin. This small bony cavity serves as the primary housing for the lacrimal gland, also known as the orbital gland. The lacrimal gland is responsible for producing the watery component of tears, which lubricates the eye. The fossa is divided into two portions by a thin, fibrous septum that attaches to the posterior aspect of the tarsal plate of the eyelid. The superior portion, larger and situated within the orbit, contains the orbital part of the lacrimal gland. The inferior portion, external to the orbit, contains the palpebral part of the lacrimal gland. The lacrimal gland's secretions drain through numerous small ducts that empty onto the surface of the conjunctiva in the superolateral fornix of the eye. This arrangement ensures continuous lubrication of the ocular surface, protecting it from drying and foreign particles. The lacrimal fossa, therefore, plays a crucial role in maintaining ocular health and function by providing a secure and stable environment for the lacrimal gland.