The conjunctiva is a mucous membrane that covers the entire anterior surface of the eyeball, including the cornea.

Conjunctiva

The thin, transparent membrane lining the inner surface of the eyelid and covering the white part of the eyeball.

Mucous Membrane

A layer of epithelial cells that produce mucus, lining various cavities and tubes in the body to protect against infection.

Anterior Surface

The front or forward-facing surface of an organ, structure, or body, positioned toward the front of the body.