Ectropion is a sagging or outward turning of an eyelid. Ectropion most often affects either one or both lower eyelids. But it can affect the upper eyelid as well.
Your eyelids help protect the outer part of your eye. The cornea is the clear part of the eye. It covers your iris and your pupil. The conjunctiva is a thin layer of tissue. It covers the inside of your eyelids and the white part of your eye (the sclera). The eyelids help keep your cornea and your conjunctiva moist. This helps prevent eye irritation and infection.
When your eyelids turn outward, the cornea and conjunctiva are exposed. They can get dry, irritated, and even infected. This can lead to serious symptoms. In some severe cases, it can lead to vision loss.