Ocular surface — Eyelids
The edges of the eyelids contain small glands (the meibomian glands) that produce the oil of the tear film, the layer that stops tears from evaporating. When the glands become blocked, the eye becomes dry; sometimes a small cyst forms: the chalazion.
Cross-section of the eyelid margin
Front view
Educational diagram — Dr Moïse Tourabaly, ophthalmologist. For information only, does not replace an examination.