Ectropion and entropion are terms used to refer to the positioning of the lower eyelids. Ectropion is when the lower eyelid pulls outward. When this happens, it leaves the white portion of the globe (eye) underneath the iris exposed and unprotected. This most commonly happens with aging, but it can occur from trauma, stroke, or prior surgeries.
Entropion is when the lower eyelid flips inward and rubs against the eye. With this condition, the eye can become irritated and red, creating sensitivity to light and wind. Scratched corneas or infection can develop from entropion and can result in permanent damage to the eye. Entropion can occur from birth, aging, or trauma.