Definition

Conjunctivitis (pronounced kuhn-junk-tuh-VIE-tis) is an inflammation (redness) of the conjunctiva. The conjunctiva is the membrane that lines the white part of the eye and the underside of the eyelid. Conjunctivitis can be caused by infection, an allergic reaction, or a physical agent, such as infrared or ultraviolet light. Conjunctivitis is often referred to as pink eye because the infection causes the eye to become very bloodshot.

Description

Conjunctivitis is an inflammation of the conjunctiva. The condition is very common since the conjunctiva is exposed to many substances that can cause infection or an allergic reaction. Conjunctivitis can be either acute or chronic. An acute condition is one that flares up suddenly and lasts a fairly short time. A chronic condition is one that lasts for a long time, usually many years.

Conjunctivitis can affect one or both eyes. If caused by an infection, it can usually be...