A new study found vision impairment may be to blame for nearly one in five cases of dementia.
Addressing vision impairments could help with dementia prevention, as vision impairment is linked to 19% of dementia cases in older adults .Researchers conducted a cross-sectional analysis using data from the National Health and Aging Trends Study .Vision impairments were defined using 2019 World Health Organization criteria. Near and distance vision impairments were defined as greater than 0.30 logMAR, and contrast sensitivity impairment was identified by scores below 1.55 logCS.
Dementia was classified using a standardized algorithm developed in NHATS, which incorporated a series of tests measuring cognition, memory and orientation, reports ofThe study analyzed data from 2021, with the primary outcome being the population attributable fraction of dementia from vision impairment.The PAF of dementia associated with at least one vision impairment was 19% .
Impairment in contrast sensitivity had the highest PAF among all other vision issues, at 15% . This figure was higher than that for impairment of near acuity, at 9.7% , or distance acuity, at 4.9% . The highest PAFs for dementia due to vision impairment was among participants aged 71-79 years , women , and non-Hispanic White participants ."While not proving a cause-and-effect relationship, these findings support inclusion of multiple objective measures of vision impairments, including contrast sensitivity and visual acuity, to capture the total potential impact of addressing vision impairment on dementia," study authors wrote.This study was led by Jason R.
This article was created using several editorial tools, including AI, as part of the process. Human editors reviewed this content before publication.
Alzheimer's Disease Alzheimer Disease Visual Impairment Vision Impairment Impairment Dementia Cognitive Impairment Geriatrics Elder Care Geriatric Medicine Older Adults Seniors Senior Citizens Elderly
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