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Prepapillary vascular loops are a congenital anomaly characterized as having both an ascending and a descending branch, and they are thought to be arterial in origin in 95% of cases.1,2 As such, complications that may spontaneously arise include branch retinal artery occlusion (BRAO) and, less commonly, amaurosis fugax, vitreous hemorrhage, and hyphema.3 We describe and videographically demonstrate the first case, to our knowledge, of trauma-induced prepapillary vascular loop torsion with associated BRAO in a young patient.
Rahimy E, Rayess N, Talamini CL, Kaiser RS. Traumatic Prepapillary Loop Torsion and Associated Branch Retinal Artery Occlusion. JAMA Ophthalmol. 2014;132(11):1376-1377. doi:10.1001/jamaophthalmol.2014.2415