2. z
Introduction
• A chalazion is a small, usually painless,
lump or swelling that appears on your
eyelid
• A blocked meibomian or oil gland causes
this condition
3. z• It can develop on the upper or lower
eyelid, and may disappear without
treatment
• Chalazia is the term for multiple
chalazion
• chalazion is sometimes confused with an
internal or external stye
4. • An internal stye is an infection of a
meibomian gland
• Chalazia may develop after styes
5.
6. Causes and risk factors
• The chalazion is caused by a blockage in
one of the tiny meibomian glands of the
upper and lower eyelids
• The oil these glands produce helps to
moisten the eyes
7. • Inflammation or viruses affecting the
meibomian glands are the underlying
causes of chalazia
• Chalazia are more common in people with
inflammatory conditions like seborrhea,
acne, rosacea, chronic blepharitis, or long-
term inflammation of the eyelid