Anthropologists call Asians as 'Mongoloids’. There is the anthropological hypothesis that the single eyelid is a outward phenotype which is the result of evolution for adaptation to relavant environments. Genetically, All modern humans are included into the subspecies Homo sapiens sapiens, i.e. the subspecies of Homo sapiens. According to the results of various analyses, Koreans are classified as part of the northern Mongoloid race and the southern Mongoloid race. Except for the southeast Asian and part of Chinese race, people of Korea, Manchuria, and north of part of the Great Wall of China are named as ‘a northern mongoloid’ and has characteristics such as small eyes without a double eyelid, epicanthus, a flat face with prominent cheekbones, and a mongolian spot on the buttocks. On the other hand, the southern Mongoloid race adapt to relatively warm climates in areas such as Polynesia, and Hawaii in the Pacific ocean. Most people from the oceanic regions and southern Asia have incomplete double eyelids, slight epicanthus, and bigger eyes than the people of the northern regions. They are called the 'southern mongoloids’. It is said that among Koreans, 70~80% of the people are north and 20~30% are the south. It has been reasoned that the racial differences of modern humans are just phenotypic variations. But, the developmental mechanism of Asian single eyelid was not suggested clearly. We reconsidered basically without stereotype for the Asian eyelid. Dr. Kwon suggests that the Asian epicanthus and single eyelid  has developed in evolutional process of eyelid(Kwon’s Theory).

Examples) In most Asian single eyelid, eyes with a single eyelid seem so small in both of width and length, they look stuffy and puffy. Therefore, the refined image is hardly made and they always cause the eyes to look swollen and small as if the person is unintentionally glaring.

The eyelashes are the true boundaries of the palpebral fissure. The eyelashes of a Caucasian is exposed completely and the eyes look clear. Also, the eye looks bigger with the parallel supratarsal crease of eyelid. In contrast, the eye of Asian without supratarsal crease is veiled by various amount of skin drooping and the eyeline where the lashes grow is hidden beneath the soft tissues called epiblepharon. The more the eyelid tissues droops down, the smaller and the puffier the eyes look.

Examples)An Asian Eye with a single eyelid

Examples)An Asian Eye with a inout type double eyelid

Examples) Combined epicanthoplasty and non-incisional double eyelid surgery

We call the Asian eye without a double eyelid as a single eyelid or monolid. An eyeline where the eyelashes grow is covered with drooping skin. As a result, the eye seems small and puffy.In an eye with double eyelid, the levator muscle  holds the skin and the skin is pulled as people open their eyes and forms a double eyelid. While in Asian eye without double eyelid, most have no connection between the levator muscle and the skin. There are thick fibrous tissue and malpositioned orbicularis muscle which block pulling the skin. The fibrous tissues and malpositioned orbicularis muscle within epicanthus and epiblepharon prevent even transmission of levator muscle power toward the medial skin because the aponeurotic fibers have been detached and do not extend to the epicanthal skin area any more.

Examples) A Caucasian Eye with supratarsal crease

Caucasians, unlike the eyes of Asians, have no epicanthus. Instead, they have a double eyelid in shape of out-fold (semilunar type), and the eyeline is exposed completely from the inner corner of the eyes. That is the reason why their eyes seem refined, more open, and vivid. This is merely a racial difference. However, the single eyelidis not to be thought as strange or unusual because thisis the usual and dominant structure for Asians or other related races. Although single eyelid is not medical issue, the surgery may be needed in order to enhance the beauty of Asian eyes.Asian double eyelid surgery should reform not only the connection between levator muscle and skin, but also should resolve the epicanthus and epiblepharon. Then, we can finally create anatomical crease and beautiful eyes.Asian blepharoplasty is done by removing excessive soft tissues, repositioning tissues, and folding the skin with further exposing the rest of your pupil/iris and giveAsian eyes a brighter, more natural look.

Examples)Structural Asian Blepharoplasty combined with the magic epicanthoplasty and double eyelid surgery

Examples) This is a case of an inner double eyelid. After combination surgery of magic epicanthoplasty and double eyelid surgery, they show distinctive eyelines and refined general shapes.

The eye of Asian without supratarsal crease is veiled by various amount of skin drooping and the eyeline where the lashes grow is hidden beneath the soft tissues called epiblepharon. The more the eyelid tissues droops down, the smaller and the puffier the eyes look. A single eyelid of Asians is likely to cover the iris and pupil partially. When skin drooping is severe, eyelashes can prickle the cornea and it can cause problem of visual acuity . In this case, a double eyelid surgery removing parts of the drooping eyelid , forming a double eyelid and extending exposure of pupil, will brighten the patients’ vision. Therefore, a double eyelid surgery has a positive effect to get a better vision for the basic function of the eyes. After double eyelid surgery, the eyes look more clear and bright.

Examples) An excisional double eyelid surgery has an beneficial effect on providing a better vision (exposure of pupil)

Examples) Forming a clear double eyelid and more exposure of pupil by ptosis correction and revisional double eyelid surgery

Examples) Forming an inner type of double eyelid and increased exposure of pupil by ptosis correction and a double eyelid surgery.

Examples) Forming an parallel type of double eyelid and increased exposure of pupil by ptosis correction and double eyelid surgery.