A chalazion , also known as a meibomian gland lipogranuloma, is a cyst in the eyelid that is caused by inflammation of a blocked meibomian gland,

usually on the upper eyelid. Chalazia differ from styes (hordeola) in that they are subacute and usually painless nodules. They may become acutely inflamed, but unlike a stye, chalazia usually sit inside the lid rather than on the lid margin.

Signs and symptoms

  • Swelling on the eyelid
  • Eyelid tenderness
  • Sensitivity to light
  • Increased tearing
  • Heaviness of the eyelid

A chalazion or meibomian cyst can sometimes be mistaken for a stye.

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