Patients with<unk>  usually have a sudden onset of blurred vision or a central visual field defect. The eye examination findings of acute<unk>  include superficial hemorrhages,<unk>  edema, and often cotton-wool spots in a sector of<unk> drained by the affected<unk> . The obstructed<unk>  is dilated and tortuous. The quadrant most commonly affected is the superotemporal (63%).<unk>  neovascularization occurs in 20% of cases within the first 6–12 months of occlusion and depends on the area of<unk>  nonperfusion. Neovascularization is more likely to occur if more than five disc diameters of nonperfusion are present and vitreous hemorrhage can ensue.
Branch retinal vein occlusion
Branch retinal artery occlusion
Retinal vasculitis
Central retinal vein occlusion
Central retinal artery occlusion
Arteritic anterior ischemic optic neuropathy
Retinal haemorrhage
Autoimmune optic neuropathy