What condition refers to the turning in of the eyelash margins?

The condition that refers to the turning in of the eyelash margins is entropion. This occurs when the eyelid, typically the lower eyelid, folds inward, causing the eyelashes to rub against the surface of the eye. This can lead to irritation, discomfort, and potentially damage to the cornea.

Entropion can be caused by age-related changes in the tissues around the eyes, scarring from previous eye injuries, or conditions like blepharospasm, where eyelid spasms lead to the eyelids pulling inward. Proper identification and coding of entropion are crucial in medical settings, as it can necessitate different management strategies or surgical interventions to prevent complications and alleviate symptoms.

The other conditions mentioned, such as ectropion, hordeolum, and chalazion, relate to other eyelid issues or infections and do not describe the inward turning of the eyelash margins specifically.