Which of the following is NOT a cause or predisposition to Meibomian cysts?

The correct response indicates that a chalazion is not a cause or predisposition to Meibomian cysts. A chalazion is actually a type of Meibomian cyst that occurs when a Meibomian gland becomes obstructed, leading to the accumulation of secretions within the gland. While it is a manifestation of a problem with the Meibomian glands, it does not predispose someone to developing Meibomian cysts in the same way that poor eyelid hygiene, blepharitis, or carcinoma can.

Poor eyelid hygiene can lead to blocked glands due to a buildup of debris and oils, increasing the risk of developing cysts. Blepharitis, an inflammation of the eyelid margins, can also contribute to dysfunction of the Meibomian glands, making them more likely to become blocked or cystic. In some cases, carcinoma can present as a lesion similar to a Meibomian cyst, but it does indicate an abnormal proliferation of cells which can disrupt normal gland function or structure.

Thus, recognizing that a chalazion is a consequence of Meibomian gland obstruction highlights its distinction from the other listed conditions that contribute to the likelihood of developing Meibomian cysts