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Electroretinography and retinal microvascular changes in type 2 diabetes.
Mirinae Kim1,2, Rae-Young Kim1,2, Wookyung Park1,2
1Department of Ophthalmology and Visual Science, College of Medicine, The Catholic University of Korea, Seoul, Korea.
Acta Ophthalmologica
|April 5, 2020
Summary
Diabetic retinopathy (DR) shows functional and structural changes before clinical signs appear. Electrophysiological parameters correlate with superficial vascular density in diabetes, suggesting neuronal and vascular dysfunction link.
Area of Science:
- Ophthalmology
- Diabetology
- Neuroscience
Background:
- Diabetic retinopathy (DR) involves progressive retinal damage.
- Early detection of DR is crucial for management.
- Understanding the relationship between retinal function and structure is key.
Purpose of the Study:
- To investigate the correlation between electrophysiological (functional) and microvascular (structural) parameters in the diabetic retina.
- To assess if these correlations differ across DR severity stages.
Main Methods:
- Prospective cohort study involving patients with diabetes mellitus (DM) and healthy controls.
- Analysis of electroretinogram (ERG) parameters for retinal function.
- Assessment of vascular parameters using optical coherence tomography (OCT) angiography.
Main Results:
- ERG parameters (amplitude, implicit time) were significantly altered in diabetic eyes compared to controls.
- Positive correlation found between ERG amplitude and superficial vascular density (VD).
- Negative correlation found between ERG implicit time and superficial VD; no correlation with deep VD.
Conclusions:
- Functional and structural retinal impairments precede clinical DR manifestation.
- Neural impairments, assessed by ERG, correlate with superficial VD in diabetes.
- This correlation suggests a link between neuronal and vascular dysfunction in type 2 diabetes.
