The researchers, whose work was published in the journal Jama Ophthalmology, said: The total contribution of late-life vision impairment to dementia may be substantial and warrants further examination to inform dementia prevention strategies.
The results suggest about 5% of dementia causes could be attributed to distance vision impairment, about 10% to near vision impairment, and about 15% to problems with contrast sensitivity.
More than 90% of vision impairments are preventable or correctable, they said, emphasizing that addressing these issues could play a vital role in dementia prevention.
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