PMID: 15223785Jun 30, 2004Paper

Stepping up to a new level: effects of blurring vision in the elderly

Investigative Ophthalmology & Visual Science
Karen HeasleyDavid B Elliott

Abstract

. To determine the effects of blurring vision on whole-body center-of-mass (CM) dynamics and foot-clearance parameters in elderly individuals performing a single step up to a new level. . Twelve healthy subjects (mean age, 72.3 +/-4.17 years) performed a single step up to a new level (heights of 73 and 146 mm). Trials were undertaken with vision optimally corrected and with vision diffusively blurred by light-scattering lenses (cataract simulation). CM and foot-clearance parameter data were assessed by analyzing data collected by a five-camera, three-dimensional (3-D) motion analysis system. . When vision was blurred, subjects took 11% longer to execute the stepping task (P < 0.05), mediolateral displacement of the point of application of the ground reaction force vector (i.e., weighted average of all pressures over the area in contact with the ground; the so called center of pressure, CP) decreased from 37.6% of stance width to 28.3% (P < 0.01), maximum distance between the mediolateral position of the CM and CP decreased by 9.8 mm (P < 0.01), and toe clearance (distance between tip of shoe and edge of step) increased in both the horizontal (28%) and vertical (19%) direction (P < 0.05). . These findings suggest that when visio...Continue Reading

Citations

Jul 19, 2006·Experimental Brain Research·Nandini Deshpande, Aftab E Patla
Feb 16, 2010·The Journals of Gerontology. Series A, Biological Sciences and Medical Sciences·Jasmine C MenantStephen R Lord
Dec 4, 2008·Optometry and Vision Science : Official Publication of the American Academy of Optometry·Anna ValeDavid B Elliott
Nov 18, 2009·Optometry and Vision Science : Official Publication of the American Academy of Optometry·Valentina GraciJohn G Buckley
Mar 15, 2008·Ophthalmic & Physiological Optics : the Journal of the British College of Ophthalmic Opticians (Optometrists)·Anna ValeDavid B Elliott
May 7, 2010·Ophthalmic & Physiological Optics : the Journal of the British College of Ophthalmic Opticians (Optometrists)·Graham J ChapmanDavid B Elliott
Apr 8, 2011·Ophthalmic & Physiological Optics : the Journal of the British College of Ophthalmic Opticians (Optometrists)·Graham J ChapmanDavid B Elliott
Aug 21, 2013·Journal of Neuroengineering and Rehabilitation·John G BuckleyClive B Beggs
May 23, 2014·Optometry and Vision Science : Official Publication of the American Academy of Optometry·David B Elliott
Jul 3, 2008·Aging Clinical and Experimental Research·Valérie Michel-PellegrinoJacques Duchêne
Mar 24, 2016·Gait & Posture·Matthew A TimmisShahina Pardhan
Jul 23, 2011·Clinical Neurophysiology : Official Journal of the International Federation of Clinical Neurophysiology·Sambit MohapatraAlexander S Aruin
May 10, 2011·Gait & Posture·A R Den OtterL H Van Der Woude
Oct 12, 2010·Clinics in Geriatric Medicine·Stephen R LordJasmine C Menant
Jun 3, 2009·Gait & Posture·Jorunn L HelbostadOlav Sletvold
Dec 7, 2007·Journal of Electromyography and Kinesiology : Official Journal of the International Society of Electrophysiological Kinesiology·N D ReevesC N Maganaris
Apr 29, 2014·Experimental Gerontology·Richard J FosterDavid B Elliott
Aug 21, 2013·Gait & Posture·Matthew A TimmisShahina Pardhan
Jun 19, 2013·Gait & Posture·Kurt E BeschornerRoger O Smith
Jun 3, 2016·Journal of Motor Behavior·Arturo Forner-CorderoJacques Duysens
Jun 23, 2018·Perceptual and Motor Skills·James C L LawWing-Kai Lam
Jun 1, 2014·Optometry and Vision Science : Official Publication of the American Academy of Optometry·M Scott AlexanderDaniel S Marigold
Feb 6, 2017·Occupational Therapy in Health Care·Al CopolilloAmanda Lyons
Jul 12, 2020·Work : a Journal of Prevention, Assessment, and Rehabilitation·Kai Way LiFan Zou
Dec 25, 2019·Journal of Neuroengineering and Rehabilitation·M BannwartM Bolliger
May 17, 2008·Journal of Aging and Physical Activity·Valérie Michel-PellegrinoJacques Duchêne
May 17, 2017·Scientific Reports·Tim KilleenMarc Bolliger
Feb 4, 2006·Journal of Applied Physiology·Gladys L OnambeleConstantinos N Maganaris

❮ Previous
Next ❯

Related Concepts

Trending Feeds

COVID-19

Coronaviruses encompass a large family of viruses that cause the common cold as well as more serious diseases, such as the ongoing outbreak of coronavirus disease 2019 (COVID-19; formally known as 2019-nCoV). Coronaviruses can spread from animals to humans; symptoms include fever, cough, shortness of breath, and breathing difficulties; in more severe cases, infection can lead to death. This feed covers recent research on COVID-19.

Blastomycosis

Blastomycosis fungal infections spread through inhaling Blastomyces dermatitidis spores. Discover the latest research on blastomycosis fungal infections here.

Nuclear Pore Complex in ALS/FTD

Alterations in nucleocytoplasmic transport, controlled by the nuclear pore complex, may be involved in the pathomechanism underlying multiple neurodegenerative diseases including Amyotrophic Lateral Sclerosis and Frontotemporal Dementia. Here is the latest research on the nuclear pore complex in ALS and FTD.

Applications of Molecular Barcoding

The concept of molecular barcoding is that each original DNA or RNA molecule is attached to a unique sequence barcode. Sequence reads having different barcodes represent different original molecules, while sequence reads having the same barcode are results of PCR duplication from one original molecule. Discover the latest research on molecular barcoding here.

Chronic Fatigue Syndrome

Chronic fatigue syndrome is a disease characterized by unexplained disabling fatigue; the pathology of which is incompletely understood. Discover the latest research on chronic fatigue syndrome here.

Evolution of Pluripotency

Pluripotency refers to the ability of a cell to develop into three primary germ cell layers of the embryo. This feed focuses on the mechanisms that underlie the evolution of pluripotency. Here is the latest research.

Position Effect Variegation

Position Effect Variagation occurs when a gene is inactivated due to its positioning near heterochromatic regions within a chromosome. Discover the latest research on Position Effect Variagation here.

STING Receptor Agonists

Stimulator of IFN genes (STING) are a group of transmembrane proteins that are involved in the induction of type I interferon that is important in the innate immune response. The stimulation of STING has been an active area of research in the treatment of cancer and infectious diseases. Here is the latest research on STING receptor agonists.

Microbicide

Microbicides are products that can be applied to vaginal or rectal mucosal surfaces with the goal of preventing, or at least significantly reducing, the transmission of sexually transmitted infections. Here is the latest research on microbicides.