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    • 20. 发明授权
    • System and method for selective retinal stimulation
    • 选择性视网膜刺激的系统和方法
    • US08892211B2
    • 2014-11-18
    • US12789063
    • 2010-05-27
    • Warren M. GrillMatthew A. Schiefer
    • Warren M. GrillMatthew A. Schiefer
    • A61N1/05A61N1/36
    • A61N1/36046A61N1/0543
    • A method for electrically stimulating a retina of an eye to induce visual perception includes placing an electrode adjacent a retinal ganglion cell (RGC) layer and selectively applying a biphasic asymmetrical waveform (BAW) to a portion of the axon. The BAW includes a pre-pulse phase and a stimulation-pulse phase. The pre-pulse phase has a first polarity, a first amplitude, and a first duration. The first amplitude and the first duration together define a pre-pulse charge having a first magnitude. The stimulation-pulse phase has a second polarity opposite the first polarity, a second amplitude, and a second duration less than the first duration. The second amplitude and the second duration together define a stimulation charge having a second magnitude. Application of the pre-pulse phase and the stimulation-pulse phase effects a change in excitability of the at least one ganglion cell and induces visual perception, respectively.
    • 用于电刺激眼睛的视网膜以诱导视觉感知的方法包括将电极放置在视网膜神经节细胞(RGC)层附近并选择性地将两相不对称波形(BAW)应用于轴突的一部分。 BAW包括预脉冲相位和刺激脉冲相位。 预脉冲相位具有第一极性,第一幅度和第一持续时间。 第一幅度和第一持续时间一起限定具有第一幅度的预脉冲电荷。 刺激脉冲相位具有与第一极性相反的第二极性,第二幅度和小于第一持续时间的第二持续时间。 第二幅度和第二持续时间一起限定具有第二幅度的刺激电荷。 预脉冲相位和刺激脉冲相位的应用分别影响至少一个神经节细胞的兴奋性变化并分别诱导视觉感知。