This is not a sclera related issue. It is just the name of a surgical procedure that is used to repair a detached retina. In this process, a silicon band, semi-hard plastic or rubber is usually placed from the mid-range of the sclera. This buckles the sclera inward, resulting in the loosening up of rental tissue and eventually giving the inner wall of the eye resting. Then the eye surgeon usually uses extreme cold or cryopexy or laser photocoagulation to repair or seal retinal tissue against the eyeball wall. This technique has been used to repair the detached retina.