Related Experiment Video
Updated: Oct 23, 2025
Using Retinal Imaging to Study Dementia
Published on: November 6, 2017
Visual Impairment and Risk of Dementia: The UK Biobank Study
Zhuoting Zhu1, Danli Shi2, Huan Liao1
1Department of Ophthalmology, Guangdong Academy of Medical Sciences, Guangdong Provincial People's Hospital, Guangzhou, China.
Purpose:
To investigate the relationship between visual impairment (VI) and dementia in the UK Biobank Study.
Design:
Prospective cohort study.
Methods:
A total of 117,187 volunteers (aged 40-69 years) deemed free of dementia at baseline were included. Habitual distance visual acuity worse than 0.3 logMAR units in the better-seeing eye was used to define VI. The incident dementia was based on electronically linked hospital inpatient and death records.
Results:
During a median follow-up of 5.96 years, the presence of VI was significantly associated with incident dementia (hazard ratio: 1.78; 95% confidence interval: 1.18-2.68; P = .006). There was a clear trend between the severity of VI and risk of dementia (P for trend = .002).
Conclusions:
We found VI was associated with increased risk of dementia, with a progressively greater risk among those with worse visual acuity. Our findings suggested that VI might be a modifiable risk factor for dementia and highlighted the potential value of VI elimination to delay the manifestation of dementia.
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