An eyelid disorder is any abnormal condition that affects the eyelids. The eyelids, which consist of thin folds of skin, muscle, and connective tissue, protect the eyes and spread tears over the front of the eyes. Some common lid problems include: stye, blepharitis, chalazion, entropion, ectropion, eyelid edema, and eyelid tumors. A stye is an infection of eyelid glands near the lid margins, at the base of the lashes. A chalazion is an enlargement of a meibomian gland, usually not infectious. Initially, a chalazion may resemble a stye, but it usually grows larger and may also be located in the middle of the lid and be internal. Blepharitis is the inflammation of the eyelid margins, often with scales and crust. It can lead to eyelash loss, chalazia, styes, ectropion, corneal damage, excessive tearing, and chronic conjunctivitis. Entropion is a condition where the eyelid margin is turned...