[Double prepapillary arterial loop and arterial occlusion]. / Boucle vasculaire prépapillaire bilatérale compliquée d'une occlusion artérielle.

The prepapillary vascular loops are rare congenital vascular anomalies. Often unilateral and asymptomatic, they may be complicated by ischemic events by twisting or thrombosis of the loop. We report a rare case of double prepapillary arterial loop complicated by left retinal ischemia due to thrombosis of the loop.