Ectropion

Ectropion is a condition in which stretching of the lower eyelid with age allows the eyelid to droop downward and turn outward. Eyelid burns or skin disease may also cause this problem.
Over time, many people develop excess eyelid skin. Eyelid skin is the thinnest skin of the body, so it is more likely to stretch. In the upper eyelid, this stretched skin may limit the field of vision, and may produce a feeling of heaviness and a tired appearance. In the lower eyelid, "bags" form.
The excess skin in the upper eyelids can be removed surgically to improve the field of vision and other symptoms. Removal of the excess skin in either the upper or lower eyelids may improve appearance. If any fatty tissue is present, it may be removed at the same time.

Symptoms
Sagging skin around the eyes
Dryness or redness
Excessive tearing
Sensitivity to light and wind

The symptoms described above may not necessarily mean that you have ectropion. However, if you experience one or more of these symptoms, contact your eye doctor for a complete exam.

Treatment
Surgery may restore the normal position of the eyelid and improve these symptoms.

Adapted from: University of Michigan Kellogg Eye Center