Fig. 1

A 64-year-old man with glaucoma had uncontrolled IOP under the maximum tolerated medical treatment and underwent implantation of an Ahmed glaucoma drainage device (A and 1A–1). This patient exhibited an increase in laminar VD on the deep vascular map at one month after surgery (1B-1, yellow shaded area) compared with the preoperative image (B). There was no change in the PPA area in the deep vascular layer (1B-1, area between the green dashed line and yellow dotted line). The patient did not exhibit any VF change after glaucoma surgery (1C and 1C-1).