Entropion is the medical term used to describe rolling inward of the lower eyelid and eyelashes towards the eye.
The skin of the eyelid and the eyelashes rub against the cornea (the front part of the eye) and conjunctiva (the mucous membrane that protects the eye). This rubbing can lead to excessive tearing, crusting of the eyelid, mucous discharge, a feeling that something is in the eye, irritation of the cornea, and impaired vision.
Causes of entropion are lax tissues as seen in aging, scarring of the inside of the eyelid (the membrane covering the inside) due to inflammation, injury, or even allergies. Entropion should be repaired surgically before the rubbing damages the cornea by causing infection and scarring. Prior to surgery, the eye can be protected by taping the lower lid down and using lubricating drops and ointment, or the injection of a temporarily paralysing solution. In some cases, sutures can be placed through the lower eyelid until more definitive surgery can be performed.
The surgery to repair entropion is usually performed under local anesthesia as an outpatient. In most cases, your doctor will tighten the eyelid and its attachments. You will use an antibiotic ointment for about a week. After your eyelids heal, your eye will feel comfortable and you will not longer have the risk of corneal scarring, infection, and loss of vision.