_:vb50956828 "url:http://en.wikipedia.org/wiki/Chalazion"^^ . _:vb50956828 . _:vb50956828 . _:vb50956828 "A blepharitis that is characterized as a cyst in the eyelid that is caused by inflammation of a blocked meibomian gland, usually on the upper eyelid."^^ . _:vb50956828 . _:vb50956828 . _:vb50956828 .