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    Visual impairment in Australia: distance visual acuity, near vision, and visual field findings of the Melbourne Visual Impairment Project

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    Author
    Taylor, Hugh R.; Livingston, Patricia M.; Stanislavsky, Yury L.; McCarty, Catherine A.
    Date
    1997
    Source Title
    American Journal of Ophthalmology
    University of Melbourne Author/s
    Taylor, Hugh; McCarty, Catherine
    Affiliation
    Medicine, Dentistry and Health Sciences: Centre for Eye Research Australia
    School of Medicine: Ophthalmology
    Metadata
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    Document Type
    Journal (Paginated)
    Citations
    Taylor, H. R., Livingston, P. M., Stanislavsky, Y. L., & McCarty, C. A. (1997). Visual impairment in Australia: distance visual acuity, near vision, and visual field findings of the Melbourne Visual Impairment Project. American Journal of Ophthalmology, 123(3), 328-337.
    Access Status
    This item is currently not available from this repository
    URI
    http://hdl.handle.net/11343/33468
    Description

    Publisher's version restricted as per Elsevier's policy.

    Abstract
    Purpose: To describe the age-specific and gender-specific rates of blindness and visual impairment in urban adults aged 40 years and older. Methods: A population-based sample of residents was recruited. Presenting and best-corrected distance visual acuities were assessed. Functional near vision was measured at each participant’s preferred distance. Visual field examination was performed with a Humphrey Field Analyzer (HFA); those unable to perform the field analyzer test attempted a Bjerrum screen or confrontation field. Results: The study population comprised 3,271 residents (83% of eligible) from ages 40 to 98 years; 54% were women. Overall, 56% of the study population wore distance correction; this was significantly lower in men but higher in the older age groups. Age-adjusted rates of blindness were 0.066% in men and 0.170% in women. Vision with current correction improved after refraction by gender and age. Direct age-standardized rates of functional near vision did not vary significantly by gender. Forty-six people had significant visual loss in their better eye. The proportion of participants with constriction of the visual field to within 20 degrees of fixation was similar for men and women when controlled for age (odds ration, 0.81; 95% confidence interval, 0.44 to 1.49) but increased significantly with age controlled for gender. Visual field abnormalities were detected in 548 right eyes (17%) and 533 left eyes (16%). Conclusions: Although overall rates of blindness because of visual acuity loss were relatively low, nearly three times more people had visual impairment because of visual field loss than visual acuity loss. These results highlight the need to target blindness prevention programs to the aging population, with a special emphasis on women.
    Keywords
    CERA; ophthalmology; Centre for Eye Research Australia; eye research; vision; visual health

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