Ophthalmic ArteryRetinal ArteryCiliary ArteriesRetinal Artery OcclusionArteriesUltrasonography, Doppler, ColorCarotid Artery, InternalBlood Flow VelocityOrbitOphthalmodynamometryVision, EntopticCerebral ArteriesEthmoid SinusitisPulmonary ArterySubarachnoid Hemorrhage, TraumaticEyeUltrasonography, Doppler, PulsedCarotid Artery DiseasesAmaurosis FugaxCircle of WillisCarotid ArteriesArterial Occlusive DiseasesRenal ArteryFemoral ArteryEthmoid SinusMesenteric ArteriesRegional Blood FlowCarotid Artery, ExternalLaser-Doppler FlowmetryRetinal VeinReceptor, Muscarinic M5Carotid Artery ThrombosisBasilar ArteryIntraocular PressureEmbolization, TherapeuticRetinal NeoplasmsEnbucrilateCerebral AngiographyOptic Neuropathy, IschemicFundus OculiRetinoblastomaCranial Fossa, AnteriorCarotid StenosisCollateral CirculationIliac ArteryVertebral ArteryUltrasonography, DopplerCoronary Artery BypassPulsatile FlowCerebrovascular CirculationReceptor, Muscarinic M3Radial ArteryUltrasonography, Doppler, TranscranialBlood PressureMammary ArteriesAngiography