Which condition involves eyelids rolling inward?

The condition characterized by the eyelids rolling inward is known as entropion. This condition results in the margins of the eyelids folding inward against the eyeball, which can lead to irritation and damage to the cornea as the eyelashes, and possibly the skin, come into contact with the surface of the eye.

Entropion is often seen in various animal species, particularly in certain breeds that have a predisposition to this anatomical abnormality. The inward rolling of the eyelids can cause discomfort and chronic irritation, necessitating medical or surgical intervention to correct the alignment of the eyelids and preserve ocular health.

In contrast, ptosis refers to the drooping of the upper eyelid, which does not involve the eyelid rolling inwards but instead sagging downwards. Trichiasis describes eyelashes that grow inward towards the eye, but it is not the same as entropion where the eyelids themselves are misaligned. Tarsorrhaphy is a surgical procedure to partially or completely close the eyelids, typically used to protect the eye in cases of severe damage or disease, rather than a condition involving inward rolling eyelids.