Double eyelids refers to the upper eyelid skin with a shallow groove above the eyelid rim. When the eyes are opened, the skin below the groove moves up, and the skin above the groove relaxes and hangs downward at the double eyelid groove. To form a pair of beautiful double eyelids, we must consider the shape of the double eyelids, the width and narrow, the swelling degree of the upper eyelid, the width of the palpebral fissure, the curvature of the edge of the eyelid rim, the ratio between the height and width of the eyes, the distance between the eyebrows and eyes. Beautiful eye standard The eye is the first of the five senses, the main visual function. Vision plays an extremely important role in people's understanding of the objective world. Usually 90% of the information obtained from the outside world is completed by the eyes. It is also an expression organ, a display of the inner world of human beings, which can fully reflect various inner activiti...