Fundus is an area where lasers are widely used, not only for diabetic fundus, but also for retinal vasculopathy, macular lesions, subretinal neovascularization, retinal fissures and retinal choroidal tumors, among others. The main lasers used are in the visible range. The main purpose of laser treatment of retinal vein obstruction is to enable the diseased retina to be nourished by the choroid, to reduce the oxygen demand of the retina, to prevent neovascularization, and thus to stop the occurrence of recurrent hemorrhage and neovascular glaucoma, etc. For this purpose, local or whole retinal photocoagulation is mostly used, while fenestrated photocoagulation is mostly used in order to prevent or reduce macular cystoid edema and stop the loss of vision. Laser treatment of peripapillary retinal veinitis, mainly for the purposes of reducing retinal hemorrhage and exudation, destroying capillary non-perfused areas, inducing neovascular atrophy, reducing recurrent hemorrhage, and protecting the macular area, is mostly done by local photocoagulation and should be performed early. Laser treatment of outer exudative retinopathy (Coat’s disease) and various types of hemangiomas of the retinal choroid mainly involves closure of abnormal vessels, but photocoagulation of the feeding branches should be carefully distinguished for hemangiomas to avoid bleeding. The macular lesions mainly include central plasmacytoid retinal choroidopathy, macular cystoid edema, age-related macular lesions, macular neovascular membrane formation and macular retinal fissures. Central plagioretinal chorioretinopathy and macular cystoid edema have better results if treated in time. For diseases such as macular area neovascular membrane formation, although it can be treated for neovascular membrane, there is no significant recovery of visual acuity after surgery due to the large damage, and similarly for macular area fissure. Retinal fissures treated with laser have great superiority in terms of less trauma and faster recovery compared with conventional surgery. However, the prerequisite is that there must be no significant retinal detachment. If there is obvious retinal detachment, then intraocular laser photocoagulation can be used in conjunction with vitreous surgery, which can also achieve good results.