Postoperative posterior ischemic optic neuropathy (PION) fol
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Postoperative visual loss (POVL) occurring in nonocular surgeries is a catastrophe with poor prognosis in most cases. The main causes are ischemic optic neuropathies [anterior ischemic optic neuropathy (AION) or posterior ischemic optic neuropathy (PION)], central retinal artery occlusion (CRAO), pituitary apoplexy, and occipital infarction. The risk has been estimated to be around 0.013-0.2% and is higher for spinal surgeries. PION is more common with spinal surgeries or radical neck dissections, whereas AION is more common with cardiac surgeries. We present a case of PION occurring after nonocular surgery (pterional meningioma excision).

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