A clear protective membrane that covers the cornea and lines the inside of the eyelids. The conjunctiva produces a mucus that allows tears to adhere to the eye. The mucus, along with other eye lubricants, is spread over the entire eye by blinking, and helps to keep the eye wet and clean. The blood vessels of the conjunctiva are normally invisible but can become inflamed and reddened from irritation or a disease such as conjunctivitis.

Tissues lining the eye socket.