Abstract Ultrasonographically measured optic nerve sheath diameter measurement has become a common noninvasive approach for detecting elevated intracranial pressure. We present a case of aneurysmal subarachnoid hemorrhage with elevated intracranial pressure. Postoperative arachnoiditis developed. and lumbar puncture revealed low intracranial pressure. https://themightyhobbyers.shop/product-category/dorbz/