RECENT CONCEPTS ON BLOOD SUPPLY OF OPTIC NERVE HEAD

BRIEF REVEW ON MODERN CONCEPTS OF BLOOD SUPLY OF OPTIC NERVE HEAD WE KNOW OPTIC NERVE IS SUPLIED VY POST CILIRY ARTERY BRACH OF OPHTHALMIC ARTERY SO POST CILIARY ARTERY AFTER SUPLYING THE DISC HAS GOT SEGMENTAL DISTRUBUTION IN CHOROID AND AND CHOROIDAL ARTERIES ARE END ARTERIES IT FOLLOWS THEREFORE ANY CONDITION THAT INTERFERES WITH THE BLOOD SUPLY OF POST CIALRY ARTEY WILL NOT ONLY PRODUCE CHANGES IN DISC BUT IN IN THE EPIPAPILLARY CHOROID CHARETERUSED BY CAVERNOUS DEGENERATION OF OPTIC NERVE FILLING OF BLOOD IN POST C ARTEY DEPENDS UPON PERFUSION PRESSURE BETWEEN IO P AND PERFUSION PRESSURE AT OPTIC NERVE HEAD GREATER THE DIFFERENCE BETTER IS THE FILLING IT FOLLOWS THAT IF PERFUSSION PRESSURE IS HIGH THERE IS LOW I PAND FILLING OF BLOOD IN PC A IS BETTER AND VISE VERSA IT GIVES US AN IDEA ABOUT PATHO PHYSIOLOGY OF ISCHEAMIC OPTIC NEUROPATHY

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Good explanation . Picture is suggestive of glaucomatous optic atrophy

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