Entropion is a condition where the lid margin ( typically the lower lid) rotates inwardly toward the eye. This results in the eyelashes rubbing against the eye creating symptoms of tearing and foreign body sensation. Surgical repair typically involves a tightening of the lid from the outer corner of the eyelid.
Ectropion occurs when the lid margin is displaced from the eye and rotated away from the globe. The lid may appear red as a result of the exposure of the inner portion of the eyelid ( conjunctiva). This condition may arise from from increased lower lid laxity associated with advanced age or from sun damage to the skin causing a tightening of the lower lid skin and pulling down of the lower lid ( cicatricial ectropion).