Visual impairment, postural stability and falls among older adults with glaucoma
Black, Alex A., Wood, Joanne M., Lovie-Kitchin, Jan E., & Newman, Beth M. (2009) Visual impairment, postural stability and falls among older adults with glaucoma. In Proceedings of the 12 Biennial Scientific and Educators' Meeting in Optometry, Optometrists Association Australia, University of Auckland, Auckland.
Purpose: To investigate the impact of glaucomatous visual impairment
on postural sway and falls among older adults.Methods: The sample comprised 72 community-dwelling older
adults with open-angle glaucoma, aged 74.0 5.8 years (range
62 to 90 years). Measures of visual function included binocular
visual acuity (high-contrast), binocular contrast sensitivity (Pelli-
Robson) and binocular visual fields (merged monocular HFA
24-2 SITA-Std). Postural stability was assessed under four conditions:
eyes open and closed, on a firm and on a foam surface. Falls
were monitored for six months with prospective falls diaries.
Regression models, adjusting for age and gender, examined the
association between vision measures and postural stability (linear
regression) and the number of falls (negative binomial
Results: Greater visual field loss was significantly associated with
poorer postural stability with eyes open, both on firm (r = 0.34,
p < 0.01) and foam (r = 0.45, p < 0.001) surfaces. Eighteen (25
per cent) participants experienced at least one fall: 12 (17 per
cent) participants fell only once and six (eight per cent) participants
fell two or more times (up to five falls). Visual field loss was
significantly associated with falling; the rate of falls doubled for
every 10 dB reduction in field sensitivity (rate ratio = 1.08, 95%
CI = 1.02–1.13). Importantly, in a model comprising upper and
lower field sensitivity, only lower field loss was significantly
associated with the number of falls (rate ratio = 1.17, 95%
CI = 1.04–1.33).
Conclusions: Binocular visual field loss was significantly associated
with postural instability and falls among older adults with glaucoma.
These findings provide valuable directions for developing
falls risk assessment and falls prevention strategies for this
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|Item Type:||Conference Paper|
|Additional Information:||The abstract of this paper was published in "Clinical and Experimental Optometry", Vol. 92, no. 1, pp.51-69. [please see DOI].|
|Divisions:||Current > QUT Faculties and Divisions > Faculty of Health|
Current > Institutes > Institute of Health and Biomedical Innovation
Current > Schools > School of Optometry & Vision Science
|Deposited On:||24 Mar 2010 08:05|
|Last Modified:||22 Apr 2010 02:29|
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