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Techniques for Processing Eyes Implanted with a Retinal Prosthesis for Localized Histopathological Analysis: Part 2 Epiretinal Implants with Retinal Tacks
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Diamond penetrating electrode array for epi-retinal prosthesis.

K Ganesan1, A Stacey, H Meffin

  • 1School of Physics, The University of Melbourne, Parkville, VIC 3010, Australia.

Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Annual International Conference
|November 25, 2010
PubMed
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Researchers developed high-density diamond electrode arrays for retinal prostheses to improve vision restoration. These diamond penetrating electrode arrays offer higher resolution for Epi-Retinal Prostheses, potentially aiding blind patients.

Area of Science:

  • Biomedical Engineering
  • Neuroscience
  • Materials Science

Background:

  • Electrical stimulation of the retina can restore partial vision in blind patients.
  • Current retinal prostheses offer limited spatial resolution.
  • Achieving higher resolution requires electrode arrays with greater density and proximity to neurons.

Purpose of the Study:

  • To present progress in the characterization and application of diamond penetrating electrode arrays.
  • To develop high-density electrode arrays for improved Epi-Retinal Prostheses.
  • To assess the feasibility of using diamond for high-resolution retinal implants.

Main Methods:

  • Design and fabrication of high-density electrode arrays using polycrystalline diamond.
  • Histological analysis of implanted diamond electrode arrays in rat retinae.

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  • Characterization of electrode arrays with approximately 100 electrodes/mm(2).

    • Main Results:

    • Successful design and initial characterization of diamond penetrating electrode arrays.
    • Demonstration of high areal density (approx. 100 electrodes/mm(2)).
    • Initial histological data on diamond implants in rat retinae.

    Conclusions:

    • Polycrystalline diamond is a promising material for high-density electrode arrays in retinal prostheses.
    • Diamond penetrating electrode arrays show potential for achieving higher resolution in vision restoration.
    • Further research is needed to optimize the design and application of these devices.