"The shape of supratarsal fold in double eyelid operation can be generally divided into two types: infold and outfold. Infold means that the double eyelid line commences beneath the medial epicanthus and extends wider laterally. Outfold means that the double eyelid line commences above the medial epicanthus and extends parallel to the lateral side. In the case of the young Korean generation, the infold eyelids are recognized much closer to the natural-looking eyelid type. The statistics suggested that 68% of the 20s women had the infold type naturally. To the ordinary Korean people, the preferred one has been recognized as the infold which looks more natural because most of the unartificial double eyelids belong to the infold group. In addition, the survey by the before-operation images showed the tendency to prominently prefer the infold. This research was studied based on the target of 979 women among the random consultation-patients, whose ages are from 17 to 30 years old. The average age of the target women was 22.4. The preference study of these patients was conducted through showing various shapes of double eyelid made by a pin and referring them to the before/after-operation images of other patients. The eyelid shapes were classified into the following three types. Infold, Inward fold and Outfold. In this classification, inward fold means that the double eyelid line commences above the medial epicanthus and extends wider laterally. The results of this survey suggested that inward fold accounted for the most, 421 persons(43.0 percent), followed by the Infold 296 (30.2 percent) and the outfold 262(26.8 percent). This result is opposite to the statistics that the ordinary people commonly prefer the infold type because the shape looks natural and unartificial."