Ectropion is an outward turning of the eyelid. This condition is most often associated with aging, however it could also be caused by facial nerve paralysis or scarring of the skin around the eyes from previous injury or burn. Most patients with ectropion complain of constant tearing and a burning sensation.
Entropion is an inward turning of the eyelid, typically involving the lower lid. It is usually caused by a loose lower eyelid; however it can also be caused by scarring from trauma or inflammation from certain ocular diseases. The inturned eyelashes rub the eye and the patient complains of irritation, tearing and a burning sensation.