Which is the most common cause of entropion?

Which is the most common cause of entropion?

• A. Trachoma
• B. Bell's palsy
• C. Orbital floor fracture
• D. Involutional changes

Answer: (D)

Age-related involutional changes in the eyelid’s support structures are the most common cause of entropion. As people age, the lower eyelid loses tone and the supporting tissues weakening—horizontal lid laxity from loosened canthal tendons and vertical instability from weakened lower lid retractors (like the levator/aponeurosis complex). This combination allows the eyelid margin to roll inward, causing the lashes to rub against the cornea. Other causes, such as scarring from trachoma (which pulls the lid inward through cicatricial changes) or trauma that alters lid position, can produce entropion but are less common in the general population.

Age-related involutional changes in the eyelid’s support structures are the most common cause of entropion. As people age, the lower eyelid loses tone and the supporting tissues weakening—horizontal lid laxity from loosened canthal tendons and vertical instability from weakened lower lid retractors (like the levator/aponeurosis complex). This combination allows the eyelid margin to roll inward, causing the lashes to rub against the cornea. Other causes, such as scarring from trachoma (which pulls the lid inward through cicatricial changes) or trauma that alters lid position, can produce entropion but are less common in the general population.