Chalazion picture

Chalazion is a small lump and refers to a swelling in the eyelid caused by chronic inflammation of one of the small oil producing glands (meibomian glands) located in the upper and lower eyelids.

A chalazion is usually a reaction to trapped oil secretions and not caused by bacteria, although the site can become secondarily infected by bacteria. When a chalazion is small and without symptoms, it may disappear without treatment. If the chalazion is large, it may cause blurred vision by distorting the shape of the eye.