Researchers from the WashU Medicine John F. Hardesty, MD Department of Ophthalmology & Visual Sciences, including Yu Jiang, PhD, and Cecilia S. Lee, MD, MS, co-authored a recently published study titled, “Quantitative Swept-Source Optical Coherence Tomography Angiography Indicators of Neurovascular Dysfunction in Alzheimer Disease.” The research explores how advanced retinal imaging may help identify changes associated with Alzheimer’s disease, offering new insights into the connection between eye health and brain health.
The study investigated whether tiny blood vessels in the retina—the light-sensitive tissue at the back of the eye—could provide clues about Alzheimer’s disease. Using a fast, noninvasive imaging technology called optical coherence tomography angiography (OCTA), researchers examined retinal blood flow in individuals with normal cognition, mild cognitive impairment, and Alzheimer’s dementia.
The team identified distinct patterns of retinal blood flow that differed among the three groups, supporting the growing evidence that the retina may serve as a “window to the brain.” Because the retina shares many structural and functional similarities with the brain, changes detected through retinal imaging may reflect neurological changes occurring during the progression of Alzheimer’s disease.
Although additional large-scale, long-term studies are needed, these findings represent an important step toward developing noninvasive, eye-based biomarkers that could one day help clinicians detect Alzheimer’s disease earlier and monitor disease progression more precisely.
“Our findings suggest that changes in the retinal microvasculature may provide valuable insights into cognitive impairment and Alzheimer’s disease. We hope this work advances our understanding of the eye-brain connection and contributes to the development of noninvasive biomarkers for earlier detection and more precise monitoring of neurodegenerative disease.”
Cecilia S. Lee, MD, MS
The study highlights the expanding role of ophthalmic imaging in understanding diseases beyond the eye and underscores the importance of interdisciplinary research aimed at improving the diagnosis and management of neurodegenerative conditions.