In many people's minds, double eyelids are more beautiful than single eyelids. In fact, to put it bluntly, it is the difference between single eyelids and double eyelids. However, there are still some differences in morphology, aesthetics and anatomy, but these differences can be changed through acquired surgery. In people's minds, the difference between single eyelids and double eyelids is obvious. In fact, there are aesthetic differences, morphological distinctions, and anatomical differences between the two. Human monolids and double lily are related to genetics and generally remain unchanged throughout life. But there are a few people whose behavior changes with age. For some people, single eyelids gradually become double eyelids as they grow older; for others, the eyelid skin becomes loose and droopy as they age, covering the folds of the original double eyelids and giving the appearance of single eyelids. The shape of human upper eyelids is generally symmetrical, but about 2.85%-8.89% of people have inconsistent upper eyelid shapes, with one side having a single eyelid and the other side having a double eyelid. For Oriental peoples, single eyelids and double eyelids are two different eyelid forms. From a physiological point of view, both are normal and there is basically no difference. But from an aesthetic point of view, single eyelids often give people the feeling of smaller eyes and "lack of beauty". In terms of function, it cannot express emotions or reveal bright eyes like double eyelids. Therefore, in addition to adding beauty, double eyelid cosmetic surgery also has certain functional significance in a sense, which is also the main reason for performing double eyelid cosmetic surgery. From a morphological point of view, the difference between single eyelid and double eyelid lies in the presence or absence of transverse wrinkles on the upper eyelid. The skin of the entire upper eyelid of single eyelid is thicker and appears more bloated, with slightly sagging skin covering the eyelid margin. When looking straight ahead, the roots of the eyelashes are not visible; the skin of the upper eyelid of double eyelid is thinner and appears more delicate, with no sagging skin on the upper eyelid, and the entire eyelid margin is visible. The palpebral fissure of monolids is shorter and narrower, while that of double lily is longer and wider. The eyelashes of monolids are short and sparse. When looking straight ahead, the eyelashes tend to tilt downward. Sometimes, the eyelashes will cover the pupil, affecting the field of vision and vision. People with double eyelids have longer eyelashes, which slightly curl upwards when looking straight ahead. The inner canthus of people with monolids is often rounded due to the presence of epicanthus, while the inner canthus of people with double lily is usually pointed and usually has no epicanthus. Since the occurrence of single and double eyelids is affected by race, region, genetics, age and other factors, there are significant differences in their morphology, and therefore there are also obvious differences in their anatomical structures. The skin of people with single eyelids is thicker, the subcutaneous tissue is higher, the orbicularis oculi muscle is more developed, and there is more fat behind the orbicularis oculi muscle. The tarsal plate of people with single eyelids is thin and narrow, and the muscle that opens the eyes - the levator palpebrae superioris muscle is underdeveloped. The opposite is true for people with double eyelids. The orbital septum of patients with single eyelids is generally located low, and the orbital septum fat may prolapse to the upper edge of the tarsus or in front of the tarsus, while the orbital septum of patients with double eyelids is located higher, and there is no orbital septum fat prolapse to the upper edge of the tarsus or in front of the tarsus. Based on the anatomical structure, when a single eyelid is opened, the skin in front of the tarsal plate and the orbicularis oculi muscle cannot be lifted up along with the tarsal plate, so the upper eyelid cannot form a wrinkle, resulting in a single eyelid. When the eyes are opened, the skin and orbicularis oculi muscle below the double eyelid line in front of the tarsal plate can be lifted up together with the tarsal plate, so wrinkles appear on the upper eyelid, which appears as double eyelids. Judging from the differences between single and double eyelids in several aspects, the double eyelid surgery that people often mention is actually to modify and reorganize the anatomical structure of the single eyelid through surgical means based on aesthetic principles, and finally form it into the appearance of a double eyelid. |
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