Visual prosthesis for control of spatiotemporal interactions
In a visual prosthesis or other neural stimulator it is advantageous to provide non-overlapping pulses in order to provide independent control of brightness from different electrodes. Non-overlapping pulses on geographically close electrodes avoid electric-field interaction which leads to brightness summation or changes in the shape and area of percepts. It is advantageous to apply pulses to nearby electrodes in a way that the currents do not overlap in time at all. The new finding is that even a small amount of separation in time results in a significant improvement with a time separation as small as 0.225 msec. ‘Nearby’ is defined as within a few millimeters of each other.
Second Sight Medical Products, Inc.
A A
A61N A61N
inventional inventional
Robert J. Alan M. Matthew J.
Greenberg Horsager McMahon