Incisional double eyelid surgery is a permanent double eyelid surgery. It removes loose skin, orbicularis oculi muscle and hypertrophic fat through incision, and directly connects the skin to the eye under direct vision. The orbicularis or levator aponeurosis is sutured together to form a double eyelid. This method requires skin incision, which is slightly more invasive, but the upper eyelid structure can be adjusted through the incision. The effect is reliable and long-lasting, and is suitable for single eyelids in various situations. The swelling will take a little longer to subside, and the wound will leave a linear scar.