Xanthelasma (or xanthelasma palpebrarum) is a sharply demarcated yellowish deposit of fat underneath the skin, usually on or around the eyelids. While they are neither harmful nor painful, these minor growths may be disfiguring and can be removed with minor surgery.
A chalazion is a swelling of one of the oil producing glands (meibomian gland) of the eyelid. It is a Greek word for a small lump. A chalazion can often be confused with a stye, which also appears as a lump in the eyelid. A stye is an infection of the lash follicle, a chalazion is an inflammatory reaction to trapped oil secretions. When a chalazion is small, it may disappear on its own. If it is large, it can cause blurred vision, discomfort and in some cases can cause the entire eyelid to swell suddenly (preseptal cellulitis), which needs to be treated with antibiotics. Occasionally if a chalazion has been present for a long time, it can cause a thickening within the structure of the eyelid, which can be difficult to treat.
Chalazions are treated with any of a combination of the following methods :