Virtual electrode design for increasing spatial resolution in retinal prosthesis
نویسندگان
چکیده
منابع مشابه
High Resolution Implantable Microsystem and Probe Design for Retinal Prosthesis
By a retinal prosthesis, the researchers have been able to stimulate a limited number of neurons (around 100) by biphasic current stimulus to reproduce an image spatially by multiplexing technique. For functional restoration of sight (visual acuity 20/80), we are to stimulate at least 2500 neurons/mm². We are far behind that target. The time required by biphasic current stimulus, the sequential...
متن کاملDesign of a high-resolution optoelectronic retinal prosthesis.
It has been demonstrated that electrical stimulation of the retina can produce visual percepts in blind patients suffering from macular degeneration and retinitis pigmentosa. However, current retinal implants provide very low resolution (just a few electrodes), whereas at least several thousand pixels would be required for functional restoration of sight. This paper presents the design of an op...
متن کاملFlexible Electrode Array for Retinal Stimulation
In this Work, ITO/PET (Indium Tin Oxide / Polyethylene Terephthalate) electrode structure which provides biocompatibility, mechanical stability and flexibility is fabricated. Flexible ITO/PET implantable electrode array for a retina has been developed. The electrode array is fabricated on a thin PET/ITO substrate and is encapsulated using, SU-8, an insulating material. PET substrate and SU-8 po...
متن کاملStimulator Design of Retinal Prosthesis
This study focuses on the design of electrical stimulator for retinal prosthesis. The stimulator must be designed such that the occurrence of electrolysis or any irreversible process in the electrodes and flexible lead is prevented in order to achieve safe stimulation over long periods using the large number of electrodes. Some types of biphasic current pulse circuits, charge balance circuits, ...
متن کاملFeasibility study of a retinal prosthesis: spatial vision with a 16-electrode implant.
OBJECTIVE To demonstrate that an epiretinal prosthesis can produce patterned visual perception in patients blinded by photoreceptor degeneration who have no other treatment options. METHODS A totally blind subject with retinitis pigmentosa had a 16-electrode epiretinal prosthesis implanted. The implant is controlled wirelessly by an external computer or a head-mounted video camera. Spatial vi...
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ژورنال
عنوان ژورنال: Healthcare Technology Letters
سال: 2016
ISSN: 2053-3713,2053-3713
DOI: 10.1049/htl.2015.0043