Neovascularization arising from disc or retinal vessels preretinal and vitreous hemorrhage, fibrosis, traction of retinal detachment, vision loss may occur acutely if bleeding from abnormal vessels into the vitreous blood:
a. Central retinal artery occlusion (CRAO)
b. Central retinal vein occlusion (CRVO)
c. Proliferative diabetic retinopathy
d. Retinal artery macroaneurysm