Entropion, or in-turning, of the eyelid can involve the upper or lower eyelid. Symptoms occur due to the scratching of the eye by the inwardly pointing eyelashes, trichiasis. Usually numerous eyelashes are involved, and it is impractical to pull all of them. This condition can occur due to generalized aging changing in the eyelid with a gradual rotation inward. Other cases are caused by scarring, either from trauma, infection, or an inflammatory condition such as shingles of the eyelid.
In cases where the eye is being severely scratched by the entropion, surgery can be performed emergently to reposition the lid. Other less severe cases might be able to be managed using lubricating eyedrops and ointments on the eye, but usually surgery will need to be done