Purpose: To describe a case of non-arteritic anterior ischemic optic neuropathy (NA-AION) secondary to acute angle closure (AAC). Case Report: We present a case of 48 years old female who presented with painful diminution of vision in the OS. After examination of the anterior segment she was diagnosed of having an acute attack of primary angle closure glaucoma. On fundus examination OD was within physiological limits, OS the disc was edematous and pale with superficial haemorrhage at disc margin. Medical management and laser peripheral iridotomy relieved pain but did not improve vision. The visual fields showed superior altitudional field defect. Patient was not a known case of diabetes mellitus or hypertension. The patient was diagnosed with NA-AION secondary to acute angle closure glaucoma. Results: A 48-year-old woman presented with AAC with reduced visual acuity. Investigations revealed concurrent NA-AION with classical disc and visual field findings. Conclusion: NAAION secondary to AAC is a rare clinical entity that can result in severe vision loss. Thus, it is important to look beyond the angle in cases of acute angle closure glaucoma.

Keywords: NA-AION; ACC.