Fundus hemorrhage, if left untreated, progresses forward because of various factors, such as diabetic retinopathy fundus hemorrhage, which is not treated in the early stage, will continue to progress forward to form retinal neovascularization, causing vitreous accumulation of blood or retinal detachment. If retinal vein obstruction is not actively treated, it will often also cause neovascularization or vitreous blood accumulation, or even macular edema, and finally form cystic lesions, causing very serious consequences such as coming retinal detachment. The same is true for age-related macular degeneration, as the choroidal neovascular membrane keeps growing under the retina, which can seriously damage macular visual function and cause irreversible vision loss. Fundus hemorrhage is often a vascular disease of the retina or choroid, caused by a variety of etiologies, such as choroidal neovascularization, retinal vein obstruction, and diabetic fundus lesions.