Entropion is the turning inward (or ectropion if turning outward) of either the upper or lower eyelid.
The causes of this problem include age-related relaxation of the eyelid structures, facial paralysis, scarring from trauma, infection, or previous surgery including lower eyelid blepharoplasty. Patients typically complain of pain, blurry vision, and irritation from the lashes touching the surface of the eye.
The repair of this condition generally involves tightening of the lower eyelid and repositioning of the lower eyelid muscles if they are loose. If there is extensive scarring as the cause of entropion, grafts may sometimes be used to reconstruct the damaged tissue.