The mean age of affected patients is 60 years. The right eye is affected more commonly than the left eye which probably reflects the greater possibility of cardiac or aortic emboli traveling to the right carotid artery. Most of the cases are due to emboli to the retinal circulation. Three main types of retinal emboli have been identified: Cholesterol, calcific, and fibrin-platelet.
Branch retinal artery occlusion
Branch retinal vein occlusion
Retinal vasculitis
Central retinal artery occlusion
Central retinal vein occlusion
Arteritic anterior ischemic optic neuropathy
Autoimmune optic neuropathy
Ischemic optic neuropathy