Fig. 8

Responses to stimulation with different diameter disk electrodes at ERD = 40 μm. a-d Qualitative results under the stimulation of 1.0 ×, 1.1 × and 1.2 × TC. Top: the electric field distribution in the retina; Bottom: the activating results of RGCs. Red points meant activated RGCs, while blue ones meant non-activated RGCs. a Φ = 50 μm. b Φ = 100 μm. c Φ = 150 μm. d Φ = 200 μm. e Correlations among the TC, TCD, and the electrode size. f Correlation between activated RGC area and stimulating current with different electrode sizes