A 61-year-old woman presented for the evaluation of a two-year history of intermittent diplopia. Neurologic examination did not demonstrate any significant findings. Non-invasive imaging revealed an unruptured 1.5 cm left internal carotid artery (ICA) aneurysm associated with a persistent trigeminal artery (PTA, Fig. 1). The patient subsequently underwent successful endovascular coil embolization of this aneurysm without complication.