What is made of fibrous connective tissue that forms the supporting structure of the eyelid?

The tarsal plate is a sturdy structure made of fibrous connective tissue that provides support and shape to the eyelids. It plays a crucial role in maintaining eyelid integrity and function, allowing them to open and close effectively while protecting the eye surface. The tarsal plates are present in both the upper and lower eyelids, giving them rigidity, which is essential for proper blinking and positioning of the eyelids over the eye.

The other options do not serve the same structural purpose. The fornix refers to the area where the conjunctiva of the eyelids meets the conjunctiva covering the eyeball, helping to allow the eyelids to move freely. The collette, or collet, is not a recognized anatomical structure in the context of eyelid anatomy; it likely refers to an anatomical term that does not pertain to eyelids. Meanwhile, the caruncle is a small, fleshy mass located at the inner corner of the eye that contains glands but is not involved in the supportive structure of the eyelids. Understanding these definitions highlights the distinct role of the tarsal plate in eyelid anatomy and function.