The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 18, 2014
Filed:
May. 27, 2010
Warren M. Grill, Cleveland Heights, OH (US);
Matthew A. Schiefer, University Heights, OH (US);
Warren M. Grill, Cleveland Heights, OH (US);
Matthew A. Schiefer, University Heights, OH (US);
Case Western Reserve University, Cleveland, OH (US);
Abstract
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.