Fundus hemorrhage is also well treated with laser after the hemorrhage is absorbed if the hemorrhage is relatively small. After the hemorrhage, certain factors may lead to the creation of a perfusion-free zone in the retina, and the perfusion-free zone may then produce neovascularization, which in turn may cause further hemorrhage. If laser is used to close the avascular zone, it can effectively control the generation of neovascularization and play a positive role in the prevention of secondary hemorrhage. The use of laser treatment after fundus hemorrhage is still very good. If the hemorrhage is relatively large and there may be accumulation of blood in the vitreous. At this time there may not be a way to use laser treatment, because the laser is not able to hit the bleeding in the interval, it must be better to remove the bleeding first, and then laser treatment.