What condition involves ingrowing eyelashes that rub against the cornea?

The condition characterized by ingrowing eyelashes that make contact with the cornea is known as trichiasis. When eyelashes grow inward towards the eye, they can cause irritation, discomfort, and potential damage to the cornea, which is the clear front part of the eye that helps focus light.

Trichiasis can occur due to various reasons, such as scarring of the eyelid or age-related changes, and it may lead to redness, tearing, and sensitivity in the affected eye. Treatment often involves addressing the ingrown eyelashes, which can include removal of the affected lashes or other surgical interventions to correct the eyelid's position.

In contrast, entropion refers to an inward turning of the eyelid itself, which can result in similar symptoms, but it is not specifically about the eyelashes growing inward. Ectropion is the opposite, where the eyelid turns outward, exposing the inner eyelid and potentially leading to dryness and irritation, but again does not involve ingrowing eyelashes. Blepharitis is an inflammation of the eyelid that can cause irritation and discomfort but is also not directly related to the growth direction of eyelashes.

Understanding these distinctions helps in identifying the proper conditions affecting eyelash alignment and their potential impact on eye health.