Entropion is caused by weakness of the lower lid retractor muscle, loss of contraction of the orbital septum and lower lid skin to hold the lid orbicularis muscle, and lack of adequate support behind the eyelid in older adults with reduced orbital fat. Scarring lid entropion can occur in both upper and lower lids. It is caused by scarring and contraction of the lid conjunctiva and lid plate. Daily care and prevention: 1. Avoid excessive visual fatigue. 2. Use the eyes in such a way that you do not feel tired, and pay attention to proper eye posture, distance, and adequacy of light sources. 3, every hour or so, let the eyes relax, such as closing the eyes to rest, walking, looking at the sky or far away, etc., so that the eyes get rest. 4, Try not to read and work in a dim environment for a long time. 5.Do eye exercises to relieve the eye muscles. 6.Check your eyesight frequently, pay attention to changes in vision, and replace glasses and contact lenses regularly. 7, do not use cell phones, tablet computers and other electronic products for a long time, to avoid reading too small fonts cause eye fatigue.