A group of researchers have created an exceptionally small implant, with electrodes the size of a single neuron that can also remain intact in the body over time -- a unique combination that holds promise for future vision implants for the blind.
A group of researchers from Chalmers University of Technology in Sweden, University of Freiburg and the Netherlands Institute for Neuroscience have created an exceptionally small implant, with electrodes the size of a single neuron that can also remain intact in the body over time -- a unique combination that holds promise for future vision implants for the blind.
The vision implant created in this study can be described as a 'thread' with many electrodes placed in a row, one after the other. In the long term you would need several threads with thousands of electrodes connected to each one, and the results of this study are a key step towards such an implant.An electrical implant to improve vision in people with blindness is not a new concept.
In the past, this problem has not been possible to solve. But now, the research team have created a unique mix of materials layered up together that do not corrode. This includes a conducting polymer to transduce the electrical stimulation required for the implant to work, to electrical responses in the neurons. The polymer forms a protective layer on the metal and makes the electrode much more resilient to corrosion, essentially a protective layer of plastic covering the metal.
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