Double eyelid surgery, or blepharoplasty, can be performed in a variety of ways, including buried lines and incisions. Post-operative results are related to a variety of factors, and age is not a decisive factor. Although minors can undergo double eyelid surgery, their features and bodies are in a constant state of change. If interference is forced through external forces when they are not fully developed, it is likely that the entire eye shape will be affected after surgery, or an unnatural and unattractive double eyelid line will be formed. Therefore, it is better to undergo double eyelid surgery when you are an adult. The formation of double eyelids is related to the muscles and skin around the eyes. During puberty, physiological functions such as muscles and fat increase rapidly, and the body shape and facial features of a person will change significantly, and the physical features begin to approach those of an adult. In the case of incomplete facial development, if double eyelid surgery is performed, it may appear uncoordinated after the facial development matures. In addition, some people with single eyelids may also develop into double eyelids in adulthood. Therefore, double eyelid surgery is not recommended for minors. Under the condition that facial development stops in adulthood, the surgery results are more stable and have fewer complications.