People who have vision problems but don’t wear glasses or seek treatment, such as surgery, are more likely to have dementia, according to the most comprehensive study on the topic in 15 years.
The findings suggest that “optimizing” vision, such as wearing glasses or getting cataract surgery, could help prevent dementia. The authors wrote that further study is needed to evaluate how vision optimization impacts cognitive decline and dementia risk.and included data from 2,967 people age 71 years and older who took tablet-based vision tests as part of the 2021 National Health and Aging Trends Study. They also answered survey questions about cognition and dementia.
Researchers said their findings are the first major update to data on the link between vision and dementia in 15 years, and that older data used self-reported vision function information, which likely meant it wasn’t accurate.
“Visual loss is associated with social isolation, difficulty reading, and in general a decrease in personal and social stimulation,” West wrote. “Personal and social isolation are risk factors for cognitive decline. If there is even an indirect link between vision impairment and loss of cognition, then improving vision should decrease the risk of dementia or at least slow progression.”
West noted that providing vision care to people in dementia care settings is difficult because, for example, eyeglasses are often lost, or families may not believe surgery is worth the emotional trauma.says more than 5 million people in the U.S. have dementia, and that number is expected to increase to 14 million by 2060.
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