Figure 2From: Simulation of epiretinal prostheses - Evaluation of geometrical factors affecting stimulation thresholdsA graphical representation of the activation area for a 400 μm diameter electrode when in contact with the retina. A graphical representation of the electric current lines elicited by the stimulation of a 400 μm diameter electrode when in contact with the retina. The area of activation for a threshold criterion of ≥1000 V/m is represented by the white regions in the retina and RPE. The stimulation voltage was 1 V giving rise to a current of 17 μA. The threshold stimulation current was found to be ~8 μA. Note: An over-stimulation of the retina was intentionally shown here to clearly illustrate the area of activation.Back to article page