Meibomian cyst
A cyst of the little glands called Meibomian glands that are located in the eyelids and make a lubricant they discharge through their tiny openings in the edges of the lids.
The lubricant is a fatty substance called sebum characteristic of sebaceous glands.</P> The Meibomian glands are named for a 17th-century German anatomist Heinrich Meibom (who must have had good eyes to see these minute structures).
They are also known as the palpebral glands, tarsal glands, or tarsoconjunctival glands.