"Ophthalmic surgery is mainly divided into upper eyelid and lower eyelid, inner canthus and outer canthus. The plastic surgery of upper eyelid is generally double eyelid surgery, and the upper eyelid relaxation correction surgery is aimed at older double eyelids and flabby skin, and it is also to form double eyelids. There is also ptosis, which leads to different sizes of eyes, which affects the appearance and function, and leads to some restrictions on the line of sight ... "