The term CORNEAL COVER can be solved by the crossword solution EYELID, which is a 6 letter word. The EYELID is a thin fold of skin that covers and protects the eye. It is composed of muscles, glands, and fatty tissue, and is responsible for keeping the eye moist and clean. The EYELID also helps to regulate the amount of light entering the eye. The cornea is the transparent outer layer of the eye, and the EYELID covers it to protect it from dust, dirt, and other foreign particles.