We studied visual acuity and visual field of 44 eyes in 42 patients who had undergone transscleral retinal detachment surgery, they were classified into a preoperative group, a postoperative group, and a group ten years after surgery. With regard to visual acuity, the postoperative group showed a significant increase compared with the preoperative group (p < 0.001), and there was no significance between the postoperative group and the group ten years after surgery. In order to quantify the visual field obtained by Goldmann perimeter, the areal size of V-4 isopter, the areal size of I-4 isopter and the volume of the visual field were adopted in the present study. Each of the three mean values was high in the following order: the group ten years after surgery, the postoperative group, and the preoperative group. The mean value of the group ten years after surgery was respectively equivalent to 80.6%, 65.5%, and 71.1% of that of normal control in the order: the areal size of V-4 isopter, the areal size of I-4 isopter, and the volume of the visual field. Our results support the conclusion that the visual acuity acquired postoperatively can be maintained for ten years after surgery. The visual field acquired postoperatively also seems to be retained ten years after surgery.