Eyelid:The lid or cover of theeye, a movable fold ofskinandmusclethat can be closed over the eyeball or opened at will. Each eye has an upper and a lower lid. Also known as apalpebra. From Eye Health Resources IRD: The Importance of Early Diagnosis 12 Devices That Can Help Your Low Vision Treatments for Wet AMD Featured Centers What Are the Best PsA Treatments for You? Understanding Biologics 10 Things People With Depression Wish You Knew Health SolutionsFrom Our Sponsors