Cited by 227Tactile and Sensory InteractionsNeuroscience and Neural EngineeringVisual perception and processing mechanisms

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Mobility performance with a pixelized vision system.

Cha, Kichul, Horch, Kenneth W., Normann, Richard A.·1992·Vision Research

DOI 10.1016/0042-6989(92)90229-c

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Abstract

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.

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Authors: Cha, K., Horch, K. W., & Normann, R. A.
Affiliations: University of Utah (US)
Corresponding author: Horch, Kenneth W.
Venue: Vision Research
Publisher: Elsevier BV
Published: 1992-07
Volume: 32
Issue: 7
Pages: 1367-1372
ISSN: 0042-6989 (ISSN-L)
DOI: 10.1016/0042-6989(92)90229-c
OpenAlex: W2026137948
Cited by: 226
References: 34
Citations by year: 2026: 1 · 2025: 2 · 2024: 5 · 2023: 6 · 2022: 11 · 2021: 4 · 2020: 4 · 2019: 3 · 2018: 4 · 2017: 10 · 2016: 6 · 2015: 11 · 2014: 16 · 2013: 13 · 2012: 11
FWCI: 0.42
Type: journal article
Language: en
Open access: closed
Licence: www.elsevier.com/tdm/userlicense/1.0/ (tdm)
Locations: Vision Research (publishedVersion)
PubMed (publishedVersion)
Topics: Life Sciences › Neuroscience › Cognitive Neuroscience › Tactile and Sensory Interactions
Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neural Engineering
Life Sciences › Neuroscience › Cognitive Neuroscience › Visual perception and processing mechanisms
Keywords: visual prosthesis, phosphenes, blind rehabilitation, field of view, pixel spacing, maze navigation, walking speed, obstacle avoidance
MeSH terms: Blindness, Electric Stimulation, Humans, Locomotion, Phosphenes, Vision, Ocular, Visual Cortex, Prostheses and Implants

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Mobility performance with a pixelized vision system.

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