The conjunctiva "connecting garment" (lat. Tunica conjunctiva) is a mucous membrane of the anterior segment of the eye and surrounds the cornea and the visible white part of the eye. The conjunctiva distributes the tear fluid on the cornea with each blink.

Therefore, among other things, serves the mobility of the eye. The conjunctiva moistens itself through glands. If it becomes inflamed, this can lead to conjunctivitis. The conjunctiva forms a small fold towards the nose, which is also called the "third eyelid". In sharks, reptiles or birds, this is significantly larger than in humans and can be folded in front of the eye like transparent goggles.