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dc.contributor.authorBuckley, John G.*
dc.contributor.authorHeasley, Karen J.*
dc.contributor.authorTwigg, Peter C.*
dc.contributor.authorElliott, David B.*
dc.date.accessioned2018-05-10T13:23:58Z
dc.date.available2018-05-10T13:23:58Z
dc.date.issued2005-01
dc.identifier.citationBuckley JG, Heasley KJ, Twigg P and Elliott DB (2005) The effects of blurred vision on the mechanics of landing during stepping down by the elderly. Gait and Posture. 21(1): 65-71.en_US
dc.identifier.urihttp://hdl.handle.net/10454/15850
dc.descriptionNoen_US
dc.description.abstractVisual impairment is an important risk factor for falls. However, relatively little is known about how visual impairment affects stair or step negotiation. The aim of the present study was to determine the effects of blurred vision on the mechanics of landing during stepping down by the elderly. Twelve elderly subjects (72.3±4.7 year) stepped down from three levels (7.2 cm, 14.4 cm and 21.6 cm). Step execution time, ankle and knee joint angular displacements at the instance of ground contact, and vertical landing stiffness and the amount of bodyweight supported by the contralateral (support) limb during the initial contact period were recorded. Measurements were repeated with vision blurred by light scattering lenses. With blurred vision, step execution time increased (P<0.05), knee flexion and ankle plantar-flexion increased (P<0.05), vertical stiffness decreased (P<0.01), and the amount of bodyweight being supported by the contralateral leg increased (P<0.05). These findings suggest that under conditions of blurred vision, subjects were more cautious and attempted to ‘feel’ their way to the floor rather than ‘drop’ on to it. This may have been an adaptation to increase the kinaesthetic information from the lower limb to make up for the unreliable or incomplete visual information. Correcting common visual problems such as uncorrected refractive errors and cataract may be an important intervention strategy in improving how the elderly negotiate stairs.en_US
dc.language.isoenen_US
dc.relation.isreferencedbyhttps://doi.org/10.1016/j.gaitpost.2003.12.001en_US
dc.subjectStiffnessen_US
dc.subjectElderlyen_US
dc.subjectVisual impairmenten_US
dc.subjectFallingen_US
dc.subjectSteppingen_US
dc.titleThe effects of blurred vision on the mechanics of landing during stepping down by the elderlyen_US
dc.status.refereedYesen_US
dc.date.Accepted2003-12-08
dc.date.application2004-01-28
dc.typeArticleen_US
dc.type.versionNo full-text in the repositoryen_US


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