Bitemporal hemianopia caused by an intracranial vascular loop.

surface and surrounding retina was provided. Visual acuity continued to decrease to 20/70 OD at 17 months, so PDT was performed (Figure). The entire astrocytoma was treated with a single 83-second laser spot at 689 nm (50 J/cm) following intravenous verteporfin (6 mg/m). After treatment, resolution of macular exudation, edema, and subretinal fluid led to improved vision of 20/50 OD (at 1 month) and 20/30 OD (at 4, 8, and 12 months). The tumor showed minimal involution with decreased intrinsic vascularity.