what causes chalazion
Chalazion is a swelling in your eyelid caused by chronic inflammation of one of the small oil producing glands (meibomian glands) located in the upper and lower eyelids. This swelling is localized and often resembles a pea-like lump under your eyelid skin.hen 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 your eye. A chalazion is sometimes confused with a stye, which also appears as a lump in the eyelid.