Eyelid surgery, also known as blepharoplasty, is a cosmetic procedure that removes excess skin, fat, and muscle from the upper and/or lower eyelids. This procedure can address drooping upper eyelids, puffy bags under the eyes, and improve the overall appearance of the eye area. The surgery can be performed on the upper eyelids, lower eyelids, or both, depending on the patient's needs and aesthetic goals.