The posterior segment from the optic nerve is divided in the intraorbital, intracanalicular, and intracranial parts. The blood supply to those several sections contain contributions from several branches and arterial sources; thus, It's not necessarily important the pathology of PION be localized to Anybody artery or area. The intraorbital section https://login-pion78633210.blazingblog.com/26225016/login-pion786-can-be-fun-for-anyone