Inferior tarsus

The inferior tarsus (inferior tarsal plate) is a dense plate of fibrous connective tissue located within the lower eyelid. It provides structural support to the lower eyelid and helps maintain its shape and stability.

The inferior tarsus is smaller and narrower than the superior tarsus. Its upper border lies near the free margin of the lower eyelid.

Relations of inferior tarsus

Anteriorly, the inferior tarsus is related to the orbicularis oculi muscle and skin of the lower eyelid, while posteriorly it is lined by the palpebral conjunctiva. Medially and laterally, it is attached to the orbital margins by the medial and lateral palpebral ligaments.

Tarsal glands

Embedded within the inferior tarsus are tarsal (Meibomian) glands, which are modified sebaceous glands that secrete the lipid component of the tear film, helping reduce tear evaporation.

Functional correlates

Functionally, the inferior tarsus supports the lower eyelid, maintains eyelid contour, and contributes to proper apposition of the eyelid against the eyeball. Clinically, it is relevant in eyelid reconstruction, lower eyelid malpositions, and disorders of the Meibomian glands.