Abstract
The quality of visual perception with retinal prostheses strongly depends on the local selectivity. Electrode arrays at the surface of the retina should excite exclusively cells within a local area but they are expected to co-stimulate bypassing axons originating from ganglion cells of the outer regions. Long electrodes parallel to these axons are shown to be good candidates for avoiding the co-stimulation phenomenon. Efficiency of focal excitation depends on the length and resistance of the electrodes.
Publication types
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Comparative Study
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Evaluation Study
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Validation Study
MeSH terms
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Action Potentials / physiology
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Animals
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Axons / physiology
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Blindness / rehabilitation*
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Computer-Aided Design
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Electric Stimulation / instrumentation*
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Electric Stimulation / methods
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Electric Stimulation Therapy / instrumentation*
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Electric Stimulation Therapy / methods
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Electrodes, Implanted*
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Equipment Design
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Equipment Failure Analysis / methods*
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Eye, Artificial
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Humans
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Microelectrodes
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Models, Neurological*
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Reproducibility of Results
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Retinal Ganglion Cells / physiology*
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Sensitivity and Specificity
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Urodela