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Related Experiment Video

Updated: Jul 31, 2025

Behavioral Assessment of Visual Function via Optomotor Response and Cognitive Function via Y-Maze in Diabetic Rats
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Visual Dysfunction in Diabetes.

Erika D Eggers1

  • 1Departments of Physiology and Biomedical Engineering, University of Arizona, Tucson, Arizona, USA;

Annual Review of Vision Science
|May 10, 2023
PubMed
Summary

Diabetic retinopathy (DR) involves early neuronal dysfunction, not just vascular issues. Targeting these neural deficits could lead to earlier treatments for vision problems in diabetes.

Area of Science:

  • Ophthalmology
  • Neuroscience
  • Endocrinology

Background:

  • Diabetic retinopathy (DR) is traditionally viewed as a vascular complication of diabetes.
  • However, emerging evidence indicates significant retinal neuronal dysfunction precedes vascular changes in DR.
  • This suggests DR is a complex neurovascular disease.

Purpose of the Study:

  • To highlight the neurovascular nature of diabetic retinopathy.
  • To emphasize the importance of early neuronal deficits in DR pathogenesis.
  • To explore potential therapeutic targets for early intervention.

Main Methods:

  • Review of clinical findings in human patients with early diabetes.
  • Analysis of electroretinograms and contrast sensitivity in human subjects.
Keywords:
diabeteshumanmouseneuronsphysiologyratretinarodent

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  • Examination of neuronal signaling pathways in rodent models of diabetes.

    • Main Results:

    • Human patients show compromised electroretinograms and reduced contrast sensitivity prior to vascular DR.
    • Rodent models exhibit similar early inner retinal dysfunction.
    • Specific neuronal deficits identified include altered GABA, glutamate, and dopamine signaling.

    Conclusions:

    • Diabetic retinopathy should be considered a neurovascular disease.
    • Early neuronal dysfunction is a key feature of diabetes-related retinal damage.
    • Understanding and targeting these neuronal deficits may enable earlier and more effective treatments.