Overview

• A longitudinal study of 8,623 participants in England found that reduced visual sensitivity and slower eye reaction times can precede dementia diagnosis by over a decade.
• Researchers suggest that Alzheimer-related amyloid plaques may first affect brain regions tied to vision before impairing memory.
• The findings, published in *Scientific Reports*, highlight the potential of routine eye tests to detect dementia earlier than traditional cognitive assessments.
• Out of the study participants, 537 developed dementia, with visual processing deficits observed as an early indicator in those affected.
• Experts recommend regular eye exams and lifestyle measures, such as exercise and mental stimulation, to mitigate dementia risk and support early detection efforts.