Pupil's cover is a term used to describe the parts of the eye that protect and cover the pupil. The EYELID, which is made up of 6 letters, is the thin membrane that covers the eye and can be opened and closed. The cornea, also made up of 6 letters, is the transparent outer layer of the eye that helps focus light into the eye. Lastly, the LID, composed of 3 letters, is the protective covering of the eyeball. Together, these three components form the pupil's cover and help protect the eye from dust, dirt, and other foreign particles.