The eyes that are delicate and evocative can undoubtedly leave quite a good impression on people. The eyes are the center of beauty and are called the window of beauty by philosophers, so a beautiful and perfect pair of eyes often plays a role in the beauty of the human body. The eyelids that surround the eyes can better increase the spatial thickness and three-dimensionality of the eyes, deepen the contours of the eyes and make them more affectionate and moving. Therefore, from the height of aesthetics, a pair of beautiful and lively eyes, if there is a proper eyelid to support, is incomparably perfect and dynamic. From a traditional aesthetic point of view, single eyelids are not as strong as double eyelids in showing the spatial dimensionality of the eyes, nor are they as dexterous in conveying the aesthetics of the face’s contours, but from a morphological point of view, the difference between single eyelids and double eyelids, apart from the difference in the presence or absence of horizontal folds on the upper lid, is that the skin of the entire upper eyelid is thicker and appears more bloated, with a slight drooping of the skin, covering the lid margin. The skin of the upper eyelid is thicker and appears more puffy, with a slight sagging of the skin that covers the lid margin, and the roots of the eyelashes are not visible when looking at the eyelids. In single eyelids, the lid fissure is short and narrow, while in double eyelids, the lid fissure is long and wide. In single-lidded eyes, the eyelashes are short and sparse, and when viewed flat, the eyelashes tend to slope downward, sometimes covering the pupil and affecting vision. In heavy lids, the eyelashes are longer and tilt slightly upward when viewed horizontally. In single eyelids, the inner canthus is rounded because it is often accompanied by canthal redundancy, while in double eyelids, the inner canthus is usually pointed and generally free of canthal redundancy. With the popularity of double eyelid surgery in the market and its wide acceptance by beauty seekers, many friends who want to realize their double eyelid wishes through double eyelid surgery are in urgent need to know more about double eyelid. Here, experts have introduced several common types of double eyelids: 1, open fan type This is also one of the most classic double eyelids, similar to the “peach blossom eyes”, deeply loved by young girls. The characteristics are narrow inside and wide outside, suitable for the eyebrow and eye distance is moderate, the eyelids are thin, the horizontal axis of the eye and the ground plane is a certain angle, the corner of the eye slightly upward, there is a feeling of glowing, very angry look. 2. Parallel Double eyelids are basically parallel to the upper eyelid margin. The eyelid line is designed so that the outer side of the eyelid does not exceed the outer corner of the eye. This is suitable for women with large eyes, high arches, eyebrows far from the eyes and thin upper eyelids. 3. Double eyelids with a wide medial and a slightly narrow lateral lid are suitable for women with no inner canthus and a close distance between the eyebrows and the eyes, which is more common in Western women. 4.No double and double double One-third to one-half is not double, only the outer part is double. This kind of double eyelid looks very flirtatious and sexy. 5.European eyelids are basically only suitable for the skeletal structure of the European face, which is also determined by the physiological anatomy of their eyelid lids. Moreover, their eyebrow arches are particularly high and their eyebrows are close to their eyes, thus, the double eyelids tend to be wide and exaggerated. However, this is not very suitable for Oriental girls.