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Purpose: To describe a case of endovascular occlusion of an unruptured anterior communicating artery aneurysm presenting with acute altitudinal visual field defect is presented here. Methods: A 52-year-old man was evaluated and treated for altitudinal visual field defect in the right eye. Results: In ophthalmic and neuro-imaging, an accompanying anterior communication artery aneurysm was detected as a cause of visual field defect. He underwent endovascular procedure, yielding excellent outcome as full recovery of visual field defect was observed one month following the procedure and sustained when followed at month 24. Conclusions: Visual dysfunction is a rare presentation of unruptured anterior communication artery aneurysm. Endovascular procedure may be a safe treatment in these cases. Keywords: Intracranial aneurysm, Anterior communicating artery, Visual field, Endovascular procedure