If the retina becomes detached, it must be repaired surgically. Reattachment of the retina involves closing the retinal tear and preventing the retina from pulling away from the back of the eye again. Several surgical procedures can be used, but in each the surgery is designed to repair the tears or breaks to prevent fluid from getting under the retina. The surgical procedure used depends upon the severity of the detachment.
Laser photocoagulation: When there are small retinal tears, with little or no nearby retinal detachment, the tears are generally repaired with a laser. The surgeon uses a laser to make small burns around the edges of the tears. These produce scars that seal down the edges of the tears, thereby preventing fluid from passing through and collecting under the retina.
Cryotherapy: Freezing the back wall of the eye behind a retinal tear functions much like laser photocoagulation. It stimulates the formation of scar tissue and seals down the edges of the tear, so that fluid cannot pass through and collect under the retina.