Reporting A Case of Spontaneous Ocular Hypotony After the Neurosurgical Procedure

Spontaneous ocular hypotony is a rare entity. So far in the literature, there have been few cases that report on ocular hypotony in nonocular surgery. The most common nonocular surgery causing hypotony is coronary arterial bypass grafting. It is due to wide fluctuations in blood pressure, central venous pressure, and the use of mannitol intraoperatively. In neurosurgery, previously reported cases were post-thrombectomy and post-aneurysm clipping. In one case, there was a complete occlusion of ophthalmic artery due to emboli, and in another case, it was due to a wide fluctuation in blood pressure. We are reporting a case of ocular hypotony in a patient who underwent right frontal craniotomy and excision of a metastatic lesion. In our case, intraoperatively, mannitol was used, but there were no fluctuations in blood pressure and central venous pressure. The use of mannitol was slated to be the reason for ocular hypotony.