Related Experiment Video
Updated: May 30, 2026
07:29
A Novel Approach for Documenting Phosphenes Induced by Transcranial Magnetic Stimulation
Published on: April 1, 2010
Estimation of simulated phosphene size based on tactile perception
Yanyu Lu1, Panpan Chen, Ying Zhao
1Department of Biomedical Engineering, School of Life Sciences & Biotechnology, Shanghai Jiao Tong University, Shanghai, China.
Artificial Organs
|August 4, 2011
Summary
Simulated visual prosthesis (phosphenes) were evaluated using tactile perception. Brighter and more eccentric phosphenes were perceived as larger, guiding prosthetic vision refinement.
Area of Science:
- Neuroscience
- Ophthalmology
- Biomedical Engineering
Background:
- Visual prostheses aim to restore vision by eliciting phosphenes.
- Psychophysical studies using simulated vision are crucial for refining prosthetic technology.
Purpose of the Study:
- To investigate how phosphene luminance, flicker rate, and visual field eccentricity affect size estimation via tactile perception.
- To assess the potential of tactile perception for quantifying simulated phosphene sizes.
Main Methods:
- Thirty subjects participated in three experiments involving simulated prosthetic vision.
- Participants used tactile perception to estimate the size of simulated phosphenes under varying luminance, flicker, and eccentricity conditions.
Main Results:
- A linear relationship was observed between visual stimulus size and reported size.
- Phosphene size estimation was significantly influenced by luminance and eccentricity (P < 0.05).
- Higher luminance and greater eccentricity led to larger perceived phosphene sizes; flicker rate had no significant effect.
Conclusions:
- Tactile perception offers a viable method for estimating phosphene sizes in simulated prosthetic vision.
- Findings suggest luminance and eccentricity are key factors influencing perceived phosphene size, informing visual prosthesis design.
