A decrease in visual sensitivity is observed in patients 12 years before the development of the disease.
Researchers observed a group of more than 8,000 people. Over the years of the study, 537 participants developed dementia.
Analysis of the data revealed that future patients encountered difficulties with visual sensitivity testing long before diagnosis; They had difficulty distinguishing figures from moving dots on the screen.
Scientists say visual impairment may be an early indicator because the toxic amyloid plaques that cause Alzheimer’s disease first attack the areas of the brain responsible for visual function.
Alzheimer’s patients also experience impaired color vision, contrast sensitivity, and the ability to control eye movements. All of these disorders can significantly affect quality of life.
Source: Ferra
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