Laser treatment of retina

My dad has had diabetes for a long time. A few days ago, his vision suddenly deteriorated. When the doctor examined him, the doctor told that a blood vessels had ruptured. He has prescribed medicines. How does the vessel ruptures? Can the problem be treated with laser or surgery?

With the help of laser rays, the hole can be sealed-off, which stops the leakage and resoles the swelling. The laser is also applied to prevent the detachment of the retina. However, it is important not to delay the treatment by laser. Since most people start treatment too late, so the benefit is minimal.