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Updated: May 10, 2025
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Corneal Confocal Microscopy: A Novel Non-invasive Technique to Quantify Small Fibre Pathology in Peripheral Neuropathies
Published on: January 3, 2011
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Alterations in Corneal Nerve Structure and Function in Prediabetes
Jun Ma1,2, Junfang Zhang1, Mengjia Tan1
1Department of Ophthalmology, Medical School of Nantong University, The Affiliated Hospital of Nantong University, Nantong, Jiangsu, China.
Journal of Diabetes Research
|April 21, 2025
Summary
Prediabetes causes corneal nerve damage before affecting nerve function, detectable by in vivo confocal microscopy (IVCM). This early neuropathy involves immune cells and is linked to factors like age and glucose levels.
Area of Science:
- Ophthalmology
- Neurology
- Endocrinology
Background:
- Prediabetes elevates diabetes risk, but its impact on neuropathy is not fully understood.
- Corneal nerve structure and function changes in prediabetes require investigation.
- Identifying risk factors for corneal nerve loss is crucial for early intervention.
Purpose of the Study:
- To assess corneal nerve structure and function alterations in prediabetes.
- To identify risk factors associated with corneal nerve loss in prediabetes.
- To compare corneal nerve status between controls, prediabetes, and Type 2 diabetes.
Main Methods:
- In vivo confocal microscopy (IVCM) and corneal sensitivity tests were performed.
- A cohort of 75 participants (23 controls, 32 prediabetes, 20 Type 2 diabetes) was studied.
- Semiautomatic analysis quantified corneal nerve fiber length (CNFL), density (CNFD), and dendritic cell (DC) density.
Main Results:
- Corneal nerve fiber length and density were reduced in prediabetes and Type 2 diabetes compared to controls.
- Corneal nerve damage was more pronounced in Type 2 diabetes than in prediabetes.
- No significant difference in corneal sensitivity was observed between controls and prediabetes, suggesting structural damage precedes functional deficits.
Conclusions:
- In vivo confocal microscopy (IVCM) detects corneal nerve damage in prediabetes.
- Corneal nerve structure damage occurs before functional impairment in prediabetes.
- Immune cells (dendritic cells) are implicated in diabetic corneal neuropathy (DCN) development and progression.
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