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Updated: Jun 15, 2026

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Published on: October 29, 2018
Vision substitution and depth perception: early blind subjects experience visual perspective through their ears
Laurent Renier1, Anne G De Volder
1Neural Rehabilitation Engineering Laboratory, Institute of Neuroscience, Université catholique de Louvain, UCL 54-46, B-1200, Brussels, Belgium. laurent.renier@uclouvain.be
Sensory substitution (SS) offers blind individuals visual-like experiences. Early blind subjects improved depth perception and object localization after brief training with a visual-to-auditory SS device.
Area of Science:
- Neuroscience
- Perception Science
- Rehabilitation Technology
Background:
- Visual experience shapes external world perception.
- Sensory substitution (SS) provides visual-like experiences for the blind.
- Limited understanding of SS effects on perception.
Purpose of the Study:
- Investigate SS effects on depth perception.
- Assess object localization in early blind and sighted individuals.
- Compare visual vs. SS perceptual experience.
Main Methods:
- Pre- and post-test assessment of object localization and depth perception.
- Utilized a visual-to-auditory SS device.
- Included early blind (n=10) and sighted controls (n=20).
- Practicing phase involved three SS training sessions.
Main Results:
- Sighted subjects effectively used depth cues pre-test.
- Blind subjects showed lower accuracy pre-test due to lack of visual experience.
- Post-test: Brief SS practice enabled blind subjects to efficiently use visual depth cues.
Conclusions:
- SS can compensate for effects of early/long-lasting blindness.
- Provides a pathway for visual-like experience.
- Highlights the plasticity of perception.
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