Chalazion most commonly occurs on which eyelid?

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Multiple Choice

Chalazion most commonly occurs on which eyelid?

Explanation:
Chalazion arises from blockage of a meibomian gland within the tarsal plate, leading to a painless, granulomatous inflammation. The upper eyelid has a larger number of meibomian glands, so obstruction is more likely there and the resulting lump tends to form in the upper lid. The lower lid has fewer glands, making chalazia less common there. Locations at the corners of the eye—medial or lateral canthus—are not typical sites for a chalazion, which develops within the eyelid tissue away from the canthi. So, the upper eyelid is the most frequent site because of the greater gland density and propensity for blockage.

Chalazion arises from blockage of a meibomian gland within the tarsal plate, leading to a painless, granulomatous inflammation. The upper eyelid has a larger number of meibomian glands, so obstruction is more likely there and the resulting lump tends to form in the upper lid. The lower lid has fewer glands, making chalazia less common there. Locations at the corners of the eye—medial or lateral canthus—are not typical sites for a chalazion, which develops within the eyelid tissue away from the canthi. So, the upper eyelid is the most frequent site because of the greater gland density and propensity for blockage.

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