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Progress towards a high-resolution retinal prosthesis.

James Weiland1, Wolfgang Fink, Mark Humayun

  • 1Doheny Retina Institute, Doheny Eye Institute, Department of Ophthalmology, Keck School of Medicine, University of Southern California, Los Angeles, CA.

Conference Proceedings : ... Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Annual Conference
|February 7, 2007
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Restoring vision requires advanced artificial vision technology with 1000 electrodes. New microelectronic systems, image processing, and polymer electrodes are key innovations for high-density neural implants.

Area of Science:

  • Biomedical Engineering
  • Neuroscience
  • Materials Science

Background:

  • Restoring vision for outer retinal diseases necessitates high-electrode-count artificial vision systems.
  • Current implantable neural stimulators are limited to 22 contacts, insufficient for advanced visual prosthetics.

Purpose of the Study:

  • To detail technological advancements enabling high-density electrode implants for artificial vision.
  • To present new developments in image processing, microelectronics, and electrode technology.

Main Methods:

  • Developed a real-time image processing system for decimation and edge detection.
  • Designed and tested application-specific integrated circuits (ASICs) for power control and microstimulation.
  • Created a novel packaging process for integrated receiver coils, interconnects, and electrodes.

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Main Results:

  • Demonstrated real-time image processing capabilities for visual data.
  • Validated ASICs for efficient closed-loop power control and neural stimulation.
  • Successfully fabricated a novel package integrating essential implant components.

Conclusions:

  • Significant progress has been made in developing the technology required for high-electrode-count artificial vision implants.
  • The integrated approach combining image processing, microelectronics, and novel packaging is crucial for future visual prosthetics.