Entropion is an abnormality in the position of the heel lid, especially the sinus margin, curling toward the eyeball. When the entropion reaches a certain level, the eyelashes inevitably fall back toward the eye, irritating the cornea and conjunctiva and becoming an impingement. As a result, clinical entropion is usually accompanied by an impingement of the eyelashes. Entropion is mainly due to scarring of the lid conjunctiva or lid plate after certain lesions and can occur in both upper and lower lids, but is more common in the upper lid. Another type of entropion is seen in the elderly and is caused by age-related degenerative changes in the ocular risk tissue, often in the lower lid. In addition, congenital developmental abnormalities can also cause entropion, often in conjunction with eyelid redundancy, commonly in infants and children, and mostly in the lower lid. Inverted eyelashes are an abnormality in the position of the eyelashes when they are turned back toward the eye, irritating the cornea and bulbar conjunctiva. It often coexists with eyelid entropion, but it can also occur in those who have only an impingement without entropion. The cause of impingement is often due to inversion of the eyelid and scarring of the follicle following blepharitis, especially ulcerative blepharitis. In addition, eyelid redundancy is a common cause of ingrown eyelashes. Patients with congenital lower eyelid entropion and lower eyelid impingement are most often seen in children and young adults. Since most of the surgery targets are children or young adults, focusing on aesthetic appearance becomes a top priority in addition to the success of the surgery. The main surgical method currently used is the microscopic plastic surgery without scarring incision method: and the original suture method and the traditional incision method has been abandoned by our oculoplastic surgeons, never to form an obvious “lower eyelid”, after the oculoplastic surgeon’s experience and thinking, the traditional incision method has been improved, combined with the ophthalmologist’s unique The skilled microsurgery technique, through micro sutures and ophthalmic surgical microscope, fine operation and plastic surgery skills, greatly reduce the patient’s scar, making it almost inconspicuous, the lower double eyelids do not appear or appear very lightly, and does not affect the child’s appearance. What does the vague lower eyelid after surgery have to do with it? Generally, the heavier the impingement, the more the eyelashes are close to the cornea, the more the lower eyelids will form during and after surgery, because the strength and power to correct the impingement out is strengthened, and at the same time the degree of double eyelids is aggravated, while patients with a lighter degree of impingement are less likely to have scarring and lower eyelids because the strength to correct the impingement is not as strong.