What condition is described by the term entropion?

• A. Eversion of the eyelid
• B. Inversion of the eyelid
• C. Radial deviation of the wrist
• D. Ulnar deviation of the wrist

Answer: (B)

The term entropion refers specifically to the condition where the eyelid is inverted, meaning that the edge of the eyelid rolls inward against the eyeball. This inversion can cause discomfort and may lead to irritation of the eye surface due to the eyelashes coming into contact with the cornea. It is most commonly seen in older adults as a result of age-related changes in the eyelid structures. Understanding the anatomy and physiology of the eyelids is crucial here, as conditions like entropion can significantly impact vision and eye health if left untreated.

The other choices describe conditions unrelated to the eyelid. Eversion of the eyelid would be the opposite of entropion, while the radial and ulnar deviations pertain to wrist movements which do not involve the eyes at all. Thus, the concept of entropion is clearly defined by the inversion of the eyelid.