purpose: to report a case of posterior ischemic optic neuropathy (pion) following percutaneous nephrolithotomy (pcnl). patient and findings: a 57-year-old male who underwent pcnl because of renal stone was referred due to painless bilateral visual loss to the level of light perception immediately after the operation. the patient had history of diabetes mellitus, hyperlipidemia, and mild anemia....

purpose: to present a case of herpes zoster ophthalmicus (hzo) with consequent posterior ischemic optic neuropathy (pion). case report: a 58-year-old woman with a history of hzo in her right eye which was under treatment presented with loss of vision to no light perception. on examination, positive relative afferent pupillary defect was detected; however the optic disc was normal on ophthalmosc...

Dear Editor: We read with great interest, the case report on ischemic optic neuropathy (1). We would like to add a few points concerning the blood supply of the optic nerve and the correlation with the development of post-operative ischemic neuropathy. Actually, the perioperative or post-operative vision loss (postoperative ischemic neuropathy) is most likely due to ischemic optic neuropathy. I...

purpose : to evaluate the therapeutic effect of posterior sub-tenon methyl prednisolone in anterior ischemic optic neuropathy, no class 1 study has shown any conclusive medical or surgical treatment for non-arteritic anterior ischemic optic neuropathy (naion). efficacy of systemic or intravitreal steroids was suggested by some studies. this study was performed to evaluate the efficacy and safet...

OBJECTIVES To develop a reliable, reproducible rat model of posterior ischemic optic neuropathy (PION) and study the cellular responses in the optic nerve and retina. METHODS Posterior ischemic optic neuropathy was induced in adult rats by photochemically induced ischemia. Retinal and optic nerve vasculature was examined by fluorescein isothiocyanate–dextran extravasation. Tissue sectioning a...

ANTERIOR ISCHEMIC OPTIC NEUROPATHY (AION) Perioperative Arteritic Anterior Ischemic Optic Neuropathy (AAION) Hypotension Nonarteritic Anterior Ischemic Optic Neuropathy (NAION) RADIATION OPTIC NEUROPATHY POSTERIOR ISCHEMIC OPTIC NEUROPATHY ISCHEMIC OPTIC DISC EDEMA WITH MINIMAL ISCHEMIC OPTIC NEUROPATHY IN SETTINGS OF DYSFUNCTION HEMODYNAMIC COMPROMISE Pre-AION Optic Disc Edema Spontaneous or T...

PURPOSE To report a case of posterior ischemic optic neuropathy (PION) following herpes zoster ophthalmicus (HZO). CASE REPORT A 58-year-old woman with history of recent HZO in her right eye presented with acute painless loss of vision in the same eye to no light perception.Examination revealed a positive relative afferent pupillary defect and a normal appearing optic disc. Inflammatory and i...

Introduction: Optic neuropathies are a broad group of diseases in which the dominant disturbance is damage to optic nerve, often irreversible. Underlying causes neuropathy both genetic and environmental. Despite limited treatment options, much research currently being done on substances that could improve nerve function alleviate clinical consequences damage.
 Purpose: This article describ...