[Anonymous]

Crocodiles have two forms of tears produced from two different sources. The first comes from a lacrimal gland located under the back portion of the orbital roof. These tears appear to help lubricate the eye in the same way the glands in humans do. Crocodiles also have a third eyelid, known as a nictitating membrane. This membrane is clear, and when closed, allows the crocodile to see while still maintaining eye moisture underwater. The second type of tears are produced by specialized glands called Harderian glands. These are located on the underside of the leading edge of their third eyelid. These glands secrete a specialized oily tear. It is thought this type helps protect the eyes from the osmotic effects of water on the cornea.