Simulation of a phosphene field based visual prosthesis

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Publication Type Journal Article
School or College College of Engineering
Department Bioengineering
Creator Horch, Kenneth W.; Normann, Richard A.
Other Author Cha, Kichul
Title Simulation of a phosphene field based visual prosthesis
Date 1990
Description A visual prosthesis for the blind based upon electrical stimulation of the visual cortex requires the development of an array of electrodes. To establish design specifications for such an electrode array, we have conducted psychophysical experiments with normally sighted subjects wearing a portable 'phosphene' simulator. The simulator consists of a small video camera, a monitor masked by an opaque perforated film, and optical lenses. The visual angle subtended by the masked monitor is 1.7" or less. We measured visual acuity and reading rate as a function of the number of pixels and their spacing. Our results indicate that a phosphene image produced by 600 electrodes implanted in a 1 cmz area near the foveal projection on the visual cortex should provide a limited but useful visual sense for the profoundly blind.
Type Text
Publisher Institute of Electrical and Electronics Engineers (IEEE)
First Page 921
Last Page 923
DOI 10.1109/ICSMC.1990.142259
Subject Visual prosthesis; Phosphene simulator
Subject LCSH Artificial vision; Phosphenes; Electrodes; Implants, Artificial; Electric stimulation; Visual cortex; Neuroprostheses -- Research
Language eng
Conference Title 1990 IEEE International Conference on Systems, Man, and Cybernetics Conference; 4-7 Nov. 1990; Los Angeles, CA, USA
Bibliographic Citation Cha, K., Horch, K. W., & Normann, R. A. (1990). Simulation of a phosphene field based visual prosthesis. Proceedings of the IEEE International Conference on Systems, Man and Cybernetics, 921-3.
Rights Management (c) 1990 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.
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Format Extent 249,742 bytes
Identifier ir-main,11586
ARK ark:/87278/s6jq1jg0
Setname ir_uspace
Date Created 2012-06-13
Date Modified 2021-05-06
ID 705352
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