MODERN CONCEPTS IN THE BLOOD SUPPLY OF OPTIC NERVE HEAD

MODERN CONCEPTS ON THE BLOOD SUPLY OF OPTIC NERVE HEAD OPTIC N HEAD IS SUPLIED BY POST CILIARY ARTEY BRACH OF OPHTHLMIC ARTEY P C A AFTER SUPLYING THE DISC HAS GOT SEGMENTAL DISTRIBUTION IN CHOROID AND CHOROIDAL ARTERIES ARE END ARTERIES THEREFORE ANY CONDITION WHICH WILL IMPAIRE WITH BLOOD SUPLY OF P C A WILL NOT ONLY PRDUCE CHANGES IN DISC BUT AT EPPAILLARY CHOROID CHARTERISED BY CAVERNOUS GEGENERATION OF OPTIC NERVE FURTHER MORE FILING OFBLOOD AT OPTIC N HEAD DEPENDS UPON PERFUSION PRESURE BETWENN P C A AND OPTIC N HEAD GTREATER THE PERFUSION PRESURE BETER IS FILLING IN OTHER WORDS IF IOP IS LOW ERFUSION PRSEURE IS BETER AND FILLING OF BLOOD IN P C A IS BETER THIS WHOLE POST EXPLAINS THE PATOPHYSIOLOGY OF ISCEMIC OPTIC NEUROPATHY

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