School of Optometry

5. Inflammation of the eyelid (chalazion and hordeolum) a. Oil glands and oil ducts provide a protective film across the eye. i. Occasionally they become blocked, and may cause: (a) A small swollen bump or pustule on the external eyelid (chalazion) (b) A red tender lump in the eyelid or at the lid margin (hordeolum) (1) Commonly known as a stye. b. ................
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