http://ideas.eyeconx.net/story.php?title=chalazion-facts A chalazion is a lump of the upper or lower eyelid caused by obstruction and inflammation of an oil gland of the eyelid. A chalazion is not a tumor and does not cause permanent changes in the vision. A chalazion is very common and usually goes away without the necessity of surgery. To see more details visit ... Mon, 19 Dec 2011 17:23:27 EST en