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Vision

Vision

Vision is the result of light being detected and transduced into neural signals by the retina of the eye. This information is then further analyzed and interpreted by the brain. First, light enters the front of the eye and is focused by the cornea and lens onto the retina—a thin sheet of neural tissue lining the back of the eye. Because of refraction through the convex lens of the eye, images are projected onto the retina upside-down and reversed.

Parallel Processing

Parallel Processing

The brain processes sensory information rapidly due to parallel processing, which involves sending data across multiple neural pathways at the same time. This method allows the brain to manage various sensory qualities, such as shapes, colors, movements, and locations, all concurrently. For instance, when observing a forest landscape, the brain simultaneously processes the movement of leaves, the shapes of trees, the depth between them, and the various shades of green. This enables a quick and...

Visual System

Visual System

Light enters the eye through the cornea, a transparent, dome-shaped surface covering the surface of the eyeball that helps to direct and focus incoming light. This light is then channeled toward the pupil, an adjustable opening whose size is controlled by the iris. The iris, a pigmented muscle, regulates the amount of light entering the eye by contracting or dilating the pupil, thereby ensuring optimal light levels for clear vision.
Once through the pupil, the light passes through the lens, a...

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Related Experiment Video

Updated: Jun 23, 2026

A Single-Channel and Non-Invasive Wearable Brain-Computer Interface for Industry and Healthcare

A Single-Channel and Non-Invasive Wearable Brain-Computer Interface for Industry and Healthcare

Published on: July 7, 2023

A wearable real-time image processor for a vision prosthesis.

D Tsai¹, J W Morley, G J Suaning

¹Graduate School of Biomedical Engineering, University of New South Wales, Sydney, NSW 2052, Australia.

Computer Methods and Programs in Biomedicine

|April 28, 2009

Summary

This summary is machine-generated.

Researchers developed a wearable image processor for vision prostheses. This flexible, dual-core device processes visual data for retinal implants, offering a promising advancement for vision restoration therapies.

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Area of Science:

Biomedical Engineering
Neuroscience
Ophthalmology

Background:

Implantable retinal prostheses show promise for treating vision loss from macular degeneration and retinitis pigmentosa.
Limited research exists on external devices that encode visual images into electrical stimuli for these prostheses.

Purpose of the Study:

To present a novel wearable image processor as the external module for a vision prosthesis.
To evaluate the feasibility of a dual-core microprocessor architecture for real-time image processing in visual prosthetics.

Main Methods:

Developed a wearable image processor utilizing a dual-core microprocessor architecture and the Linux operating system.
Implemented image-processing algorithms on the device's digital signal processor.
Enabled remote control of the image processor via a standard desktop computer.

Main Results:

Demonstrated that a dual-core architecture can create a highly flexible and configurable image processor.
Highlighted the potential inadequacy of general-purpose embedded microprocessors for complex retinal prosthesis image-processing strategies.

Conclusions:

The developed dual-core wearable image processor is a viable and flexible component for vision prostheses.
Advanced processing capabilities are essential for effective image encoding in retinal prostheses, potentially exceeding the limits of standard embedded systems.