Blepharitis

Blepharitis is the medical term for inflammation of the eyelids. The word "blepharitis" is derived from the Greek word blepharos, which means "eyelid," and the Greek suffix itis, which is typically used to denote an inflammation in English. Inflammation is a general term used to describe the process by which white blood cells and chemicals produced in the body protect us from foreign substances, injury, or infection. The normal body response of inflammation involves varying degrees of swelling, redness, pain, warmth, and change in function. Blepharitis is an inflammation of the eyelids, causing red, irritated, itchy eyelids, and the formation of dandruff-like scales on the eyelashes. It is a very common eye disorder with a wide variety of causes. It affects people of all ages. Although it may be uncomfortable, annoying, or unattractive, blepharitis is not contagious and generally does not cause any permanent damage to eyesight. The condition can be difficult to manage because it tends to recur. Another term for blepharitis is granulated eyelids. Angular blepharitis is a term used to describe blepharitis which primarily affects the outer corners of the eyelids.

Source: MedicineNet.com
http://www.medicinenet.com/blepharitis/article.htm