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. Author manuscript; available in PMC: 2017 Apr 10.
Published in final edited form as: J Neural Eng. 2016 Jan 20;13(2):021001. doi: 10.1088/1741-2560/13/2/021001

Figure 4.

Figure 4

Levels of neural stimulation for clinical devices with electrodes having a GSA < 0.01 cm2 (region above and to the left of the dotted line as indicated by the arrows). See figures 1 and 3 for symbols not in the legend. Stimulation targets: ER—epi-retinal surface, ON—optic nerve surface, ABI—auditory brain stem surface, CI—cochlear implant, SCR- suprachoroidal placement targeting the retina. Studies referenced (Shannon 1992, Veraart et al 1998, Huang et al 2001, Mahadevappa et al 2005, McCreery and Shepherd 2006, Balthasar et al 2008, Fujikado et al 2011).