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Related Experiment Video

Updated: Jun 19, 2026

Ex Vivo OCT-Based Multimodal Imaging of Human Donor Eyes for Research into Age-Related Macular Degeneration
10:14

Ex Vivo OCT-Based Multimodal Imaging of Human Donor Eyes for Research into Age-Related Macular Degeneration

Published on: May 26, 2023

Normal central retinal function and structure preserved in retinitis pigmentosa.

Samuel G Jacobson1, Alejandro J Roman, Tomas S Aleman

  • 1Department of Ophthalmology, Scheie Eye Institute, University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA. jacobsos@mail.med.upenn.edu

Investigative Ophthalmology & Visual Science
|October 3, 2009
PubMed
Summary

Some patients with retinitis pigmentosa (RP) have normal central retinal function and structure, similar to Usher syndrome. This finding impacts future clinical trials for RP treatments.

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Last Updated: Jun 19, 2026

Ex Vivo OCT-Based Multimodal Imaging of Human Donor Eyes for Research into Age-Related Macular Degeneration
10:14

Ex Vivo OCT-Based Multimodal Imaging of Human Donor Eyes for Research into Age-Related Macular Degeneration

Published on: May 26, 2023

Area of Science:

  • Ophthalmology
  • Genetics
  • Retinal Diseases

Background:

  • Retinitis pigmentosa (RP) is a group of inherited retinal diseases.
  • Usher syndrome, a related condition, has shown normal function and structure in some forms.
  • Investigating RP heterogeneity is crucial for understanding disease mechanisms.

Purpose of the Study:

  • To investigate if normal retinal function and structure, seen in Usher syndrome, also exist in nonsyndromic RP patients.
  • To compare these findings between nonsyndromic RP and Usher syndrome populations.

Main Methods:

  • Studied 238 patients with simplex, multiplex, or autosomal recessive RP using static chromatic perimetry.
  • Evaluated a subset with optical coherence tomography (OCT) to assess retinal structure.
  • Measured co-localized visual sensitivity and photoreceptor nuclear layer thickness in the central retina.

Main Results:

  • Identified RP patients with normal rod- and cone-mediated function in the central retina.
  • Observed that retinal structure (OCT) correlated with visual function.
  • Found similar patterns of normal function and structure in both nonsyndromic RP and Usher syndrome groups.

Conclusions:

  • Nonsyndromic RP can exhibit regions of functionally and structurally normal retina, challenging previous assumptions.
  • This regional variation necessitates tailored approaches for future RP clinical trials.
  • Further research is needed to explore potential common molecular mechanisms underlying these RP variations.