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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: May 1, 2026

Retinal Pigment Epithelium Transplantation in a Non-human Primate Model for Degenerative Retinal Diseases

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Retinal prosthesis.

James D Weiland, Mark S Humayun

IEEE Transactions on Bio-Medical Engineering

|April 9, 2014

Summary

This summary is machine-generated.

Retinal prostheses offer partial sight restoration for retinitis pigmentosa patients, improving daily life. Future advancements require better technology and understanding of retinal electrical stimulation for significant vision recovery.

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Area of Science:

Biomedical Engineering
Ophthalmology
Neuroscience

Background:

Retinal prosthesis development has advanced significantly over 20 years.
Two devices are approved for retinitis pigmentosa (RP) treatment.
Current devices provide partial vision restoration, enhancing patient mobility and object detection.

Purpose of the Study:

To review recent clinical trials of retinal prostheses.
To highlight technological breakthroughs for next-generation devices.
To discuss the path towards significant vision restoration.

Main Methods:

Review of clinical trial data for approved retinal prostheses.
Analysis of technological innovations in retinal implant design.
Examination of the biological interactions between electrical stimulation and retinal tissue.

Main Results:

Approved retinal prostheses demonstrate efficacy in improving mobility and object recognition.
Clinical trials show partial sight restoration is achievable.
Key technological advancements are identified for future device development.

Conclusions:

Current retinal prostheses offer functional vision improvements for RP patients.
Further progress necessitates enhanced technology and a deeper understanding of retinal stimulation.
Next-generation retinal prostheses hold promise for more substantial vision restoration.