The posterior segment from the optic nerve is separated into the intraorbital, intracanalicular, and intracranial areas. The blood supply to these numerous sections contain contributions from numerous branches and arterial resources; as a result, It isn't required that the pathology of PION be localized to any one artery or place. https://https-situspion786-com56677.worldblogged.com/31912826/top-guidelines-of-daftar-pion786