Plastic surgery is a specialty of surgery which involves the repair, reconstruction or alteration of the human body. It can be divided into two major categories: reconstructive operation and cosmetic operation. Reconstructive surgery involves craniofacial operation, operation by the eye, microsurgery, and burn care. While reconstructive surgery aims to reconstruct or improve the functioning of a part of the body, cosmetic or aesthetic surgery aims to improve its appearance. Plastic surgery is usually performed by a plastic surgeon who specializes in reducing the scarring or disfigurement that resulted from injuries, birth defects or disease treatment.