期刊
JOURNAL OF ALZHEIMERS DISEASE
卷 80, 期 2, 页码 493-504出版社
IOS PRESS
DOI: 10.3233/JAD-201516
关键词
Alzheimer's disease; biomarkers; dementia; optical coherence tomography; retina
With the increasing prevalence of dementia, there is a need for more accurate diagnostic tools to influence intervention positively. The idea of using the eye as a potential biomarker is not new, but with the emergence of OCT and OCT angiography, there is a promising opportunity to analyze retinal parameters linked to specific subtypes of dementia and aid in earlier diagnosis.
With dementia becoming increasingly prevalent, there is a pressing need to become better equipped with accurate diagnostic tools that will favorably influence its course via prompt and specific intervention. The overlap in clinical manifestation, imaging, and even pathological findings between different dementia syndromes is one of the most prominent challenges today even for expert physicians. Since cerebral microvasculature and the retina share common characteristics, the idea of identifying potential ocular biomarkers to facilitate diagnosis is not a novel one. Initial efforts included studying less quantifiable parameters such as aspects of visual function, extraocular movements, and funduscopic findings. However, the really exciting prospect of a non-invasive, safe, fast, reproducible, and quantifiable method of pinpointing novel biomarkers has emerged with the advent of optical coherence tomography (OCT) and, more recently, OCT angiography (OCTA). The possibility of analyzing multiple parameters of retinal as well as retinal microvasculature variables in vivo represents a promising opportunity to investigate whether specific findings can be linked to certain subtypes of dementia and aid in their earlier diagnosis. The existing literature on the contribution of the eye in characterizing dementia, with a special interest in OCT and OCTA parameters will be reviewed and compared, and we will explicitly focus our effort in advancing our understanding and knowledge of relevant biomarkers to facilitate future research in the differential diagnosis between Alzheimer's disease and common forms of cognitive impairment, including vascular dementia, frontotemporal dementia, and dementia with Lewy bodies.
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