Double eyelids refer to the upper eyelid skin having a shallow groove above the eyelid margin. When the eyes are opened, the skin below this groove moves upward, while the skin above this groove is relaxed and hangs downward at the double eyelid groove. fold. To form a pair of beautiful double eyelids, factors such as the shape and width of the double eyelids, the swelling of the upper eyelids, the width of the palpebral fissures, the curvature of the eyelid margins, the ratio between the height and width of the eyes, and the distance between the eyebrows and the eyes must be comprehensively considered. Introduction to double eyelid types: parallel double eyelids; the upper eyelid margins are basically parallel. The design of the double eyelid line should not exceed the outer corner of the eye. It is suitable for women with larger eyes, higher eyebrow arch, eyebrows farther from the eyes and thin upper eyelids. Open fan type; this is also one of the most classic double eyelids, similar to "peach blossom eyes", and is deeply loved by young girls. It is characterized by being narrow on the inside and wide on the outside, suitable for a moderate distance between the eyebrows and the eyes, thin eyelids, the horizontal axis of the eyes at a certain angle with the ground plane, and the corners of the eyes slightly raised, giving a feeling of high spirits and a very high-spirited look. Double eyelids that are wide on the inside and slightly narrow on the outside are suitable for those without epicanthal folds and the distance between the eyebrows and eyes is relatively close, which is more common among Western women. Undouble and paired; one-third to one-half of the eyelids are undouble and only the outer part is paired. This kind of double eyelids looks very charming and sexy. European-style double eyelids are basically only suitable for the bone structure of European faces, which is also determined by the physiological anatomical structure of the eyelids. Moreover, their eyebrows are very high and close to their eyes, so their double eyelids are often wide and exaggerated. But this is not very suitable for Oriental girls.