Eyes are the windows of the soul, and they are a pair of discerning eyes given by parents. Single eyelid and double eyelid are affected by heredity. As long as it's not "looking up at the sky and looking down at the ground" (the eyelids droop too long), there is no need to make a double eyelid. Moving eyelids will hinder the circulation of blood vessels and nerves in the eyes, affect vision, and give people an ugly and strange feeling. In case of scar constitution, they will leave huge ugly scars on their eyelids, which will affect the city appearance every day.