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    Association of Visual Acuity and Cognitive Impairment in Older Individuals: Fujiwara-kyo Eye Study

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    Author
    Mine, M; Miyata, K; Morikawa, M; Nishi, T; Okamoto, N; Kawasaki, R; Yamashita, H; Kurumatani, N; Ogata, N
    Date
    2016-08-01
    Source Title
    BioResearch Open Access
    Publisher
    MARY ANN LIEBERT, INC
    University of Melbourne Author/s
    Kawasaki, Ryo
    Affiliation
    Ophthalmology (Eye & Ear Hospital)
    Metadata
    Show full item record
    Document Type
    Journal Article
    Citations
    Mine, M., Miyata, K., Morikawa, M., Nishi, T., Okamoto, N., Kawasaki, R., Yamashita, H., Kurumatani, N. & Ogata, N. (2016). Association of Visual Acuity and Cognitive Impairment in Older Individuals: Fujiwara-kyo Eye Study. BIORESEARCH OPEN ACCESS, 5 (1), pp.228-234. https://doi.org/10.1089/biores.2016.0023.
    Access Status
    Open Access
    URI
    http://hdl.handle.net/11343/258292
    DOI
    10.1089/biores.2016.0023
    Abstract
    Both visual impairment and cognitive impairment are essential factors that determine the quality of life in the aged population. The aim of this study was to determine if a correlation existed between visual acuity and cognitive impairment in an elderly Japanese population. The Fujiwara-kyo Eye Study was a cross-sectional study of individuals aged ≥68 years who lived in Nara Prefecture of Japan. Participants underwent ophthalmological examinations and cognitive function test. A mild visual impairment was defined as having a best corrected visual acuity (BCVA) >0.2 logarithm of the minimum angle of resolution (logMAR) units in the better eye. Cognitive impairment was defined as having a Mini-Mental State Examination (MMSE) score of ≤23 points. A total to 2818 individuals completed the examinations. The mean age of the participants was 76.3 ± 4.8 years (mean ± standard deviation). The mean BCVA of the better eye was -0.02 ± 0.13 logMAR units and 6.6% subjects were classified as being mildly visually impaired. The mean MMSE score was 27.3 ± 2.3 and 5.7% subjects were classified as being cognitively impaired. The proportion of subjects with cognitive or moderate visual impairment increased with age, and there was a significant correlation between the visual acuity and MMSE score (r = -0.10, p < 0.0001). Subjects with mild visual impairments had 2.4 times higher odds of having cognitive impairment than those without visual impairment (odds ratio 2.4, 95% confidence interval, 1.5-3.8, p < 0.001) after adjusting for age, sex, and length of education. We conclude that it may be important to maintain good visual acuity to reduce the risk of having cognitive impairment.

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