What does turning inward of the eyelid indicate?

Turning inward of the eyelid is a condition known as entropion. This is characterized by the lid margin turning towards the eyeball, which can cause irritation and discomfort, as the eyelashes can rub against the cornea and conjunctiva. Entropion can occur due to various reasons including age-related changes, scarring, or muscle dysfunction.

In contrast, ectropion refers to the outward turning of the eyelid, while aphakia is the absence of the lens of the eye, and diplopia is the medical term for double vision. Understanding these definitions helps clarify why entropion is the correct choice for describing the inward turning of the eyelid.