Download - THE EVOLUTION OF NEUROPROSTHESES
THE EVOLUTION OF NEUROPROSTHESES
Lawrence Livermore - Flexible Silicone-Based Electrode Arrays
Flexible metallized silicone prototype
Process Development(Batch Fabrication)
•Flexible substrate•Metal deposition•Encapsulation•Electrical contacts
Conformal test implant
Features:• Interface with delicate neural tissue• Conformal with neural tissue• Resilient during implantation• Biocompatible for long term implantation
LLNL is developing soft electrode arrays that readily
conform to the retina.
• Sandia National Laboratories
Bulk Micromachined Components
Bosch etched single crystal silicon electrodes
Argonne National Labs - Ultrananocrystalline Diamond (UNCD) as Bioinert Hermetic Coating for Si Microchip Encapsulation
Hermetic UNCD coating encapsulates Si micro-chip to make it bio-inert /biocompatible
UNCD-coated microtips provide high-current / bio-inert electrode for current injection into retina
Si
UNCD
1 µm1 µm
Adaptive optics can provide unique diagnostic capability for high resolution retinal imaging
Visual acuity is degraded by aberrations in the cornea and lens.
Adaptive optics correct for these aberrations.
wavefront corrector
•An adaptive optics system can be used to sense and correct aberrations in a subject’s eye and allow detailed studies of retinal structure under a variety of conditions.
Without AO
Images of single cells in the living human retina
With AO