Mobility performance with a pixelized vision system

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Publication Type Journal Article
School or College School of Medicine; College of Engineering
Department Mechanical Engineering; Ophthalmology; Bioengineering; Surgery; Physiology
Creator Normann, Richard A.; Horch, Kenneth W.; Cha, Kichul
Title Mobility performance with a pixelized vision system
Date 1992
Description A visual prosthesis, based on electrical stimulation of the visual cortex, has been suggested as a means for partially restoring functional vision in the blind. The prosthesis would create a pixelized visual sense consisting of punctate spots of light (phosphenes). The present study investigated the feasibility of achieving visually-guided mobility with such a visual sense. Psychophysical experiments were conducted on normally sighted human subjects, who were required to walk through a maze which included a series of obstacles, while their visual input was restricted to information from a pixelized vision simulator. Walking speed and number of body contacts with obstacles and walls were measured as a function of pixel number, pixel spacing, object minification, and field of view. The results indicate that a 25 x 25 array of pixels distributed within the foveal visual area could provide useful visually guided mobility in environments not requiring a high degree of pattern recognition.
Type Text
Publisher Cambridge University Press
Volume 32
Issue 7
First Page 1367
Last Page 1372
Subject Visual Prosthesis; Mobility; Phosphene Simulator
Subject MESH Vision; Visual Cortex; Prostheses and Implants; Electric Stimulation; Blindness
Language eng
Bibliographic Citation Cha K, Horch KW, Normann RA. (1992). Mobility performance with a pixelized vision system. Vision Res, 32(7), 1367-72
Rights Management © Cambridge University Press
Format Medium application/pdf
Identifier ir-main,12754
ARK ark:/87278/s6xs6ck8
Setname ir_uspace
ID 703063
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