Spatial fitting by percept location tracking

Patent metadata

Field	Value
Publication number	US-9808625-B2
Application number	US-201615144616-A
Country	US
Kind code	B2
Filing date	May 2, 2016
Priority date	May 1, 2015
Publication date	Nov 7, 2017
Grant date	Nov 7, 2017

Abstract

The present invention is an improved spatial fitting and training system for a visual prosthesis. The system of the present invention maps projected locations of percepts, where a person perceives a percept from a visual prosthesis to the intended location of the percepts. The projected location may vary over time. This test results can be used to correct a visual prosthesis or spatially map the visual prosthesis.

First claim

The invention claimed is:

1. A method fitting a visual prosthesis comprising:
providing a touch screen monitor connected to a computer:
projecting an image on the touch screen monitor in an actual location;
asking a subject to indicate the perceived location of the image by touching the touch screen monitor;
providing feed back to subject as the accuracy of the perceived location;
calculating a difference between the actual location and the perceived location in the computer; and
adjusting the visual prosthesis based on the difference.

2. The method according to claim 1 , further comprising:
repeating the steps of claim 1 , at different times;
storing the difference in the computer for each of the different times; and
refining the adjustment of the visual prosthesis by stored difference values.

3. The method according to claim 1 , further comprising:
recording a camera sampling position of the visual prosthesis camera; and
refining the adjustment of the visual prosthesis by the camera sampling position.

4. The method according to claim 1 , wherein the feedback is auditory feedback.

5. The method according to claim 4 , wherein the auditory feedback is an indication of right or wrong.

6. The method according to claim 4 , wherein the auditory feedback is an indication of the direction and distance of the error.

7. The method according to claim 1 , further comprising:
calculating a confidence interval based on error rates; and
excluding data with a confidence interval less that a predetermined minimum.

8. The method according to claim 7 , wherein the predetermined minimum is 95%.

9. The method according to claim 7 , wherein the confidence interval is calculated by t-distributions.

10. The method according to claim 7 , further comprising calculating separate confidence intervals for vertical and horizontal errors and excluding data with vertical confidence interval of less than a predetermined amount, and excluding data with a horizontal confidence interval of less than a predetermined amount.

11. The method according to claim 10 , wherein the predetermined amount is 95%.

Assignees

• Greenberg Robert J
• Barry Michael
• Dagnelie Gislin
• Second Sight Medical Products Inc

Inventors

• Greenberg Robert J
• Barry Michael
• Dagnelie Gislin

Classifications

• A61N1/36046 Primary

  of the eye · CPC title

• G06F19/3406

  Physics · mapped topic

• A61N1/0543

  Retinal electrodes · CPC title

• A61N1/37247

  User interfaces, e.g. input or presentation means · CPC title

• G16H20/70

  relating to mental therapies, e.g. psychological therapy or autogenous training · CPC title