The traditional surgery for retinal detachment is scleral buckling and is performed in the operation room under local or general anesthesia. In this process, after cryotherapy is done to seal the retinal tears, a piece of silicone plastic is sewn onto the outside wall of the eye (sclera) over the site of the tear. This pushes (buckles) the sclera in toward the retinal tear and holds the retina against the sclera until scarring from the cryotherapy seals the tear. This procedure is usually combined with placement of an encircling silicone band around the circumference of the eye to lessen the pulling of the vitreous on the retina. The surgeon may also drain fluid from underneath the retina and place a gas or air bubble into the vitreous cavity. These buckles and bands are left permanently and are not visible from outside. Success rates for re-attaching the retina with scleral buckling are approximately 90-95%.