Related Experiment Video
Updated: Mar 1, 2026
Using Retinal Imaging to Study Dementia
Published on: November 6, 2017
Retinal microvascular dysfunction in mild cognitive impairment: Associations with cerebral small vessel disease,
William Robert Kwapong1, Zheli Chen2, Youjie Wang3
1Department of Neurology, Xuanwu Hospital, Capital Medical University, Beijing, China.
Introduction:
Mild cognitive impairment (MCI) is a transitional stage to dementia, with cerebral small vessel disease (SVD) as a key contributor. Since retinal microvascular changes may mirror cerebral pathology, we investigated the associations between retinal microvasculature, neuroimaging, and plasma biomarkers in individuals with MCI.
Methods:
61 MCI patients and 57 controls (CU) underwent retinal imaging, Neuroimaging (peak width of skeletonized diffusivity [PSMD], white matter hyperintensities [WMH]), plasma biomarker analysis, and cognitive assessment. Partial correlations and mediation analyses were adjusted for confounders.
Results:
MCI exhibited greater retinal tortuosity (p < 0.05) and sparser vasculature (p < 0.001), correlating with higher PSMD, WMH volumes, and adverse plasma biomarkers (all p < 0.05). Mediation analysis revealed PSMD and WMH volumes partially mediated retinal-cognitive associations (p for all mediation < 0.05).
Discussion:
Retinal microvascular dysfunction in MCI reflects concurrent cerebral SVD and neurodegeneration, supporting its potential as a non-invasive biomarker for early cognitive decline.
Insights
Retinal microvascular changes in mild cognitive impairment (MCI) are linked to cerebral small vessel disease (SVD) and neurodegeneration. This suggests retinal imaging may serve as a non-invasive biomarker for early cognitive decline.
Area of Science:
- Ophthalmology
- Neurology
- Biomarker Research
Background:
- Mild cognitive impairment (MCI) signifies a transition to dementia, often driven by cerebral small vessel disease (SVD).
- Retinal microvasculature may reflect cerebral pathologies, prompting investigation into its role in MCI.
- Understanding these links can identify novel biomarkers for early detection.
Purpose of the Study:
- To investigate associations between retinal microvasculature, neuroimaging markers, and plasma biomarkers in individuals with MCI.
- To explore the relationship between retinal changes and markers of cerebral SVD and neurodegeneration.
- To evaluate the potential of retinal microvasculature as a non-invasive biomarker for cognitive decline.
Main Methods:
- Retinal imaging, neuroimaging (peak width of skeletonized diffusivity [PSMD], white matter hyperintensities [WMH]), plasma biomarker analysis, and cognitive assessments were performed on 61 MCI patients and 57 controls.
- Statistical analyses included partial correlations and mediation analyses, with adjustments for relevant confounders.
Main Results:
- Individuals with MCI showed increased retinal tortuosity and sparser vasculature compared to controls.
- These retinal changes correlated significantly with higher PSMD, WMH volumes, and adverse plasma biomarkers.
- Mediation analyses confirmed that PSMD and WMH volumes partially explained the association between retinal characteristics and cognitive function.
Conclusions:
- Retinal microvascular dysfunction in MCI is indicative of concurrent cerebral SVD and neurodegeneration.
- These findings support the utility of retinal microvasculature as a non-invasive biomarker for detecting early cognitive decline.
- Further research can leverage retinal imaging for earlier and more accessible diagnosis of neurodegenerative conditions.
More Related Videos
12:48In Vivo Dynamics of Retinal Microglial Activation During Neurodegeneration: Confocal Ophthalmoscopic Imaging and Cell Morphometry in Mouse Glaucoma
Published on: May 11, 2015
07:30Evaluation of the Cognitive Performance of Hypertensive Patients with Silent Cerebrovascular Lesions
Published on: April 23, 2021
