Diseases of the lids may by inflammatory, anomalies in position, tumors or congenital abnormalities. Blepharitis is chronic inflammation of the lid margins and may be squamous or ulcerative. Stye or hordeolum is an acute suppurative inflammation of Zies’s gland and is treated by fomentation, antibiotics, and anti-inflammatory drugs. Chalazion is a chronic granulomatous inflammation of the meibomian glands. Treatment is incision with thorough scraping. Trichiasis is a condition of misdirected lashes, rubbing against the cornea. The lid margin may be rolled inwards (entropion), or outwards (ectropion). Entropion is usually spastic or cicatricial, while ectropion may additionally be mechanical or paralytic. Treatment is usually surgical. Adhesion of the lids to the globe leads to symblepharon. Ptosis is drooping of the upper lid and may be congenital or acquired which may again be neurogenic, myogenic or mechanical. Fasanella-Servat operation, levator muscle resection and sling operation are considered according to the amount of ptosis.