Chalazion
Chalazia are formed due to a blockage of the meibomian glands opening in the eyelids. This is usually preceded by a stye [Hordeolum Internum] which is caused usually due to constant had to eye contact [e.g constant eye rubbing]. The Chalazion consists of a pus-like substance which is surrounded by a thick wall. This thick wall prevents any antibiotics from having any effect on its resolution. Hence the treatment of this condition requires a minor surgical procedure [Incision and Curettage] to drain out the pus.