Here you can see a draining chalazion of the upper eyelid. Chalazions occur from a blockage of one of the oil-producing meibomian glands at the lid margin. The static oil then incites a non-infectious granulomatous inflammation in the lid that creates a non-tender bump.
Small chalazions can often be treated with warm compresses and lid massage. Larger ones require drainage for better cosmesis.
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drainingchalazion.wmv (8.4meg, Windows video file)