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The Retina

The Retina

The retina is a layer of nervous tissue at the back of the eye that transduces light into neural signals. This process, called phototransduction, is carried out by rod and cone photoreceptor cells in the back of the retina.

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Updated: Nov 4, 2025

Techniques for Processing Eyes Implanted With a Retinal Prosthesis for Localized Histopathological Analysis

Techniques for Processing Eyes Implanted With a Retinal Prosthesis for Localized Histopathological Analysis

Published on: August 2, 2013

Retinal prostheses: Where to from here?

Penelope J Allen^1,2,3

¹The Centre for Eye Research Australia, East Melbourne, Australia.

Clinical & Experimental Ophthalmology

|May 22, 2021

Summary

This summary is machine-generated.

Bionic eye research aims to restore vision for visually impaired patients. Despite regulatory approval, challenges prevent commercial production, driving innovation in surgical techniques and visual processing for future devices.

Keywords:

research retinal prostheses retinitis pigmentosa

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Area of Science:

Ophthalmology
Biomedical Engineering
Neuroscience

Background:

Development of retinal prostheses, or "bionic eyes," has been ongoing since the 1960s.
The goal is to restore functional vision for patients with severe visual impairment.
Global research efforts, particularly from the US, Germany, France, Japan, and Australia, have led to clinical trials.

Purpose of the Study:

To summarize the development and commercialization challenges of retinal prostheses.
To highlight the current status of approved bionic eye devices.
To outline future research directions for improved retinal implants.

Main Methods:

Review of historical development and clinical trials of retinal prostheses.
Analysis of regulatory approval processes (FDA HDE, CE mark).
Identification of barriers to commercial production and distribution.

Main Results:

Three bionic eye devices have achieved regulatory approval (FDA HDE or CE mark).
Despite approval, none of these three devices are currently in commercial production.
Significant challenges exist in device development, surgical implantation, and commercialization.

Conclusions:

The path to commercializing retinal prostheses is complex, with numerous hurdles.
Leaving the market after achieving approval signifies substantial difficulties.
Future research focuses on simpler surgeries and advanced visual processing algorithms to create viable commercial alternatives.