Retinal Artery OcclusionRetinal ArteryElectroretinographySusac SyndromeFluorescein AngiographyFundus OculiRetinal DiseasesGlaucoma, NeovascularAmaurosis FugaxVisual AcuitySneddon SyndromeBlindnessRetinal VeinOphthalmic ArteryArterial Occlusive DiseasesParacentesisRetinaOphthalmodynamometryCarotid Artery DiseasesOptic Neuropathy, IschemicArteriesVision DisordersTomography, Optical CoherenceCiliary ArteriesInfarction, Middle Cerebral ArteryFibrinolytic AgentsRetinal Vein OcclusionRetinal Vessels