Visual Prosthesis Based on Optic Nerve Stimulation with Penetrating Electrode Array - Artificial Sight: Basic Research, Biomedical Engineering, and Clinical Advances - page 196

Figure 10.8. LEP recorded from the recording electrode at the optical nerve sheath by
different wavelengths of the stimulating light sources.
The result indicates that minimal LEP signals were measured at the surface of
the optical nerve sheath position by the recording electrode, which demonstrates
that the optic nerve sheath can shield the conduction of bioelectrical signal. So
Figure 10.9. LEP recorded from the recording electrode penetrated into the optical nerve
by different wavelengths of the stimulating light sources.