ABSTRACTPurpose: To report a case of unilateral prepapillary vascular loop along with peripheral third order retinalarteriolar tortuosity in the same eye, and to discuss potential diagnostic considerations.Observations: Color fundus pictures and wide-angle fluorescein angiography (FA) demonstrated a pre-papillaryvascular loop and a region of retinal arteriolar tortuosity in third order arterioles superotemporally in the lefteye. The examination and ancillary testing on the right eye were normal.Conclusion and Importance: The vascular abnormality in this case does not fit a pattern present in…