Fig. 9
Electric field distributions and activation results for RGCs under stimulation with non-planar electrodes. Top: the electric field distribution in the retina; Bottom: the activating results of RGCs. Red points indicate activated RGCs, while blue ones indicate non-activated RGCs. a Convex hemispherical electrode. b Convex conical electrode. c Concave hemispherical electrode. d Concave conical electrode