What is impingement? What are the symptoms? Ingrown eyelashes are a condition in which the eyelashes grow backwards so that they touch the eyeball. With prolonged rubbing of the eyelashes, it can cause conjunctival congestion and irritating tears in mild cases, and corneal ulcers, corneal white spots, and corneal amyloidosis in severe cases, leading to vision loss or even blindness in serious cases. What kind of people develop impingement? In children and adolescents, it is congenital and is caused by abnormal eyelash growth direction, redundancy of the lower eyelid, sometimes in combination with entropion, and congenital entropion of the eyelid. In older adults, it is caused by inflammation of the conjunctiva of the eyelid and contraction of the scar at the lid margin, as well as various causes of entropion such as blepharitis, trachoma, and trauma. Inverted eyelids occur when the eyelid is turned inward as a result of trauma. Treatment for ingrown eyelashes 1. Conservative treatment: For cases where the number of ingrown eyelashes is small and not combined with lid entropion 2. Direct extraction: When the number of ingrown eyelashes is small, they can be directly extracted, which is simple and effective. You can use eyelash tweezers to remove the eyelashes, but since the hair follicles are not completely destroyed, it is easy to recur within 2-6 weeks. 3. Laser treatment: A long pulse width 1064nm laser can be used to selectively destroy the hair follicles to achieve the treatment purpose. Usually 4-5 treatment sessions are required. Surgical treatment In all cases where the eyelashes grow in an abnormal direction, or in cases where disorganized eyelashes have been tried and all other methods have failed, surgery can be used. There are many surgical procedures, including lower lid muscle and skin removal, hair follicle removal, and partial lid removal. The exact surgical procedure depends on the individual and the situation.