Vision, vision-specific functioning and mobility, and their relationship with clinically assessed cognitive...

Area of Science:

• Gerontology
• Ophthalmology
• Neuroscience

Background:

• The link between self-reported visual disability and cognitive impairment in older adults remains unclear.
• Understanding this relationship is crucial for developing targeted interventions for age-related cognitive decline.

Purpose of the Study:

• To investigate the association between vision-specific functioning (VSF), vision-specific mobility (VSM), and visual acuity (VA) with clinically assessed cognitive impairment.
• This study aimed to clarify the role of vision in cognitive health among older individuals.

Main Methods:

• A cross-sectional, population-based study involving 874 adults aged 60 years and older at higher risk for cognitive impairment.
• Vision was assessed using Rasch-transformed scores from the Impact of Vision Impairment questionnaire for VSF and VSM, and standard visual acuity measurements.
• Cognitive impairment was evaluated using comprehensive neuropsychological testing, categorizing participants into no cognitive impairment (NCI), mild cognitive impairment-no dementia (CIND), and moderate CIND or dementia.

Main Results:

• Increased odds of moderate CIND and moderate CIND or dementia were observed with worsening VSF and VSM.
• Significantly higher odds of mild CIND, moderate CIND, and moderate CIND or dementia were associated with poorer visual acuity.
• These findings highlight a dose-response relationship between vision impairment and cognitive decline.

Conclusions:

• The study underscores the significant association between various measures of vision impairment and cognitive decline in older adults.
• Preventive strategies targeting vision loss and enhancing quality of life are recommended to mitigate the risk of age-related cognitive decline.
• Further research into the mechanisms underlying the vision-cognition link is warranted.