A 70-year-old woman developed massive subretinal exudation after surgical repair of a rhegmatogenous retinal detachment. Postoperative choroidal detachment suggested a choroidal source of the subretinal exudate. We believe the cause of the choroidal detachment and exudation was vortex ampulla obstruction resulting from the encircling band. The subretinal exudate underwent gradual resolution and did not influence the anatomic result of retinal reattachment.