Soft 3D retinal implants with diamond electrode a way for focal stimulation
Abstract
In neuroprostheses, the focal stimulation of the neuronal tissues is today a real challenge. These questions are particularly important in retinal prostheses to improve the quality of the images mapped onto an electrode array. It has been demonstrated that to achieve a normal vision the future generation of retinal implant must have 600 pixels with a pitch between electrodes around 50 μm. The long term in-vivo stability of electrodes in contact with the tissues remains a general and important challenge. After several days of implantation several histological studies show an inflammatory of the tissue at the interface between the electrode and tissues. Here we proposed a new approach based on retinal implants fabricated from 3D shaped diamond electrodes exhibiting both an improvement of the spatial resolution of the stimulation and a long term bio-inertness.
Keywords
biological tissues
biomedical electrodes
diamond
eye
retinal prostheses
mapped image quality improvement
electrode array
neuronal tissue
neuroprostheses
focal stimulation
2D shape diamond electrode
soft 3D retinal implant fabrication
vision
prosthetics
bioinertness
spatial resolution
tissue inflammatory
in-vivo electrode stability
image resolution
medical image processing
neurophysiology
3D structures
Diamond electrodes
Retinal implant