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Related Experiment Video

Updated: May 8, 2026

Techniques for Processing Eyes Implanted With a Retinal Prosthesis for Localized Histopathological Analysis
12:01

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

Published on: August 2, 2013

Techniques for processing eyes implanted with a retinal prosthesis for localized histopathological analysis.

David A X Nayagam1, Ceara McGowan, Joel Villalobos

  • 1Bionics Institute. DNAYAGAM@bionicsinstitute.org

Journal of Visualized Experiments : Jove
|August 22, 2013
PubMed
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New methods improve safety assessments for retinal prostheses. This technique precisely evaluates retinal tissue health adjacent to implanted electrodes, enhancing preclinical safety studies.

Area of Science:

  • Biomedical Engineering
  • Ophthalmology
  • Histopathology

Background:

  • Retinal prostheses are advancing, necessitating robust preclinical safety evaluation methods.
  • Current histological techniques for assessing implanted retinal prostheses are suboptimal, causing artifacts and hindering localized tissue analysis.
  • Existing methods lack the spatial resolution to correlate ocular tissue health with individual electrode sites.

Purpose of the Study:

  • To develop and validate improved histological procedures for evaluating retinal tissue adjacent to implanted retinal prostheses.
  • To overcome limitations in spatial localization and artifactual detachment associated with standard histological processing.
  • To enable precise assessment of localized tissue damage caused by retinal implant electrodes.

Main Methods:

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Techniques for Processing Eyes Implanted with a Retinal Prosthesis for Localized Histopathological Analysis: Part 2 Epiretinal Implants with Retinal Tacks
10:00

Techniques for Processing Eyes Implanted with a Retinal Prosthesis for Localized Histopathological Analysis: Part 2 Epiretinal Implants with Retinal Tacks

Published on: February 14, 2015

Characterization of a Novel Human Organotypic Retinal Culture Technique
05:51

Characterization of a Novel Human Organotypic Retinal Culture Technique

Published on: June 9, 2021

Related Experiment Videos

Last Updated: May 8, 2026

Techniques for Processing Eyes Implanted With a Retinal Prosthesis for Localized Histopathological Analysis
12:01

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

Published on: August 2, 2013

Techniques for Processing Eyes Implanted with a Retinal Prosthesis for Localized Histopathological Analysis: Part 2 Epiretinal Implants with Retinal Tacks
10:00

Techniques for Processing Eyes Implanted with a Retinal Prosthesis for Localized Histopathological Analysis: Part 2 Epiretinal Implants with Retinal Tacks

Published on: February 14, 2015

Characterization of a Novel Human Organotypic Retinal Culture Technique
05:51

Characterization of a Novel Human Organotypic Retinal Culture Technique

Published on: June 9, 2021

  • A novel color-coded dye marking scheme was implemented to identify and localize ocular tissue adjacent to implanted electrodes.
  • An modified eye fixation technique was developed to minimize artifactual retinal layer detachment during processing.
  • Scleral translucency was achieved, allowing for the precise localization of individual electrodes and implant components.
  • Matched control eyes were utilized to enhance the statistical power of histopathological assessments.

Main Results:

  • The developed method successfully enabled precise identification and localization of retinal tissue in direct proximity to implanted electrodes.
  • Artifactual retinal detachment was significantly minimized, preserving the integrity of retinal cytoarchitecture.
  • The technique allowed for clear visualization and localization of individual electrodes and implant structures within translucent sclera.
  • Histopathological assessments demonstrated reliable discrimination and evaluation of retinal cytoarchitecture in implanted eyes.

Conclusions:

  • This novel histological approach provides a reliable and efficient method for assessing the safety and localized effects of retinal prostheses.
  • The improved techniques overcome critical limitations in preclinical evaluation, enabling more accurate safety assessments.
  • This method is crucial for advancing the development and clinical translation of retinal implant technologies.