Entropion is a heritable trait in which the lower eyelid is inverted, causing the eyelashes of the lower lid to brush against the eye. Entropion should not be left untreated. The constant irritation results in tearing and can lead to corneal ulceration, scarring, and blindness. It may affect one or both eyes.
Mild cases of entropion can be treated by injecting a long acting antibiotic under the skin of the affected eyelid. Sometimes, staples, sutures, or clips will need to be applied to the skin surface of the affected eyelid. Rams carrying this trait should not be used for breeding.