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Ophthalmology

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Eyelid

Question
15 out of 17
 

Chalazion is? (AIIMS May 2009)



A Lipogranulomatous inflammation

B Acute bacterial infection

C Infection of the glands of Zeis or Moll

D Stye

Ans. A Lipogranulomatous inflammation (Ref. Parson’s diseases of Eye 19th ed. 467)

Chalazion is a chronic non specific inflammatory granuloma of Meibomian glands with a lipomatous center.
The lipid component of the tear film is produced by sebaceous glands known as “Meibomian” glands (located in the tarsal plates) and the glands of “Zeis” (which open into the hair follicles of the eyelashes).

1. An enlargement of a Meibomian gland is known as a “chalazion,” while an infection of a Zeis gland is known as a “external hordeolum” or “stye”.

2. Below the lipid layer is located the lacrimal or aqueous layer of the tear film.

3. This middle layer is the thickest of the three tear layers, and it is formed primarily by the glands of “Krause” and “Wolfring” and secondarily by the main “lacrimal” gland,.

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