Computers And Visual Stress
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Computers And Visual Stress
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Author : Edward C. Godnig
language : en
Publisher: Seacoast Publishing
Release Date : 1990
Computers And Visual Stress written by Edward C. Godnig and has been published by Seacoast Publishing this book supported file pdf, txt, epub, kindle and other format this book has been release on 1990 with Computers categories.
Computers Visual Stress
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Author : Edward C. Godnig
language : en
Publisher: Seacoast Information Services, Incorporated
Release Date : 1991
Computers Visual Stress written by Edward C. Godnig and has been published by Seacoast Information Services, Incorporated this book supported file pdf, txt, epub, kindle and other format this book has been release on 1991 with Computers categories.
An Investigation Of Postural And Visual Stressors And Their Interactions During Computer Work
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Author : Delia Eng Treaster
language : en
Publisher:
Release Date : 2003
An Investigation Of Postural And Visual Stressors And Their Interactions During Computer Work written by Delia Eng Treaster and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2003 with Eyestrain categories.
Abstract: The continuing dominance of computers and the rising chorus of complaints from computer users highlight the importance of understanding the risks associated with computer use. Particularly challenging are the issues of eyestrain and muscle pain, the latter particularly puzzling because of the low force levels and static postures of computer work. To study eyestrain and muscle pain during computer work, a multi-disciplinary approach was developed, using techniques from three diverse fields: biomechanics, myofascial pain and vision. A laboratory study was used to examine the effects of the independent variables, postural and visual stress, during a 30-minute typing task. Sixteen healthy females (ages 19-29) participated in the experiment; all were touch-typists. The study design was a 2 x 2 repeated measures, with randomized order of testing. The dependent variables included development of trigger points in the upper trapezius, subjective measures of discomfort, visual function, and surface electromyography (EMG). Trapezius EMG data were collected at locations of known trigger points. An experienced myofascial specialist performed onsite examination to identify the trigger points before and after each experimental session. Cyclical changes in the EMG median frequency that occurred throughout the experiment were quantified. A method for quantifying eyestrain through EMG changes in the obicularis oculi was also developed. There was a significant interaction between postural and visual factors on both the perception of eyestrain and on the trapezius EMG. In particular, the high visual stress condition, when combined with the low postural stress condition, produced fewer cyclic changes in median frequency (i.e. less motor unit rotation), and greater trigger point pain. A hypothesized injury pathway for the development of myofascial trigger points was developed. The role of high visual stress, perhaps mediated through the stress reaction of the autonomic nervous system, was also postulated. particular, the high visual stress condition, when combined with the low postural stress condition, produced fewer cyclic changes in median frequency (i.e. less motor unit rotation), and greater trigger point pain. A hypothesized injury pathway for the development of myofascial trigger points was developed. The role of high visual stress, perhaps mediated through the stress reaction of the autonomic nervous system, was also postulated. The importance of good ergonomics in terms of location of computer components as well as visual parameters is highlighted. The findings of the interactions show the value of a multi-disciplinary approach to a complex problem.
Visual Ergonomics Handbook
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Author : Jeffrey Anshel
language : en
Publisher: CRC Press
Release Date : 2005-06-22
Visual Ergonomics Handbook written by Jeffrey Anshel and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2005-06-22 with Medical categories.
Viewing an electronic display screen varies significantly from reading text on paper and human eyes often suffer for it. Featuring cutting-edge research in the field of visual ergonomics, Visual Ergonomics Handbook focuses on vision and eye-care issues in both the office and industrial setting, including eye safety issues in industrial plants and c
Computer Eye Stress
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Author : R. Anthony Hutchinson
language : en
Publisher: M Evans & Company
Release Date : 1985-01-01
Computer Eye Stress written by R. Anthony Hutchinson and has been published by M Evans & Company this book supported file pdf, txt, epub, kindle and other format this book has been release on 1985-01-01 with Eye categories.
Discusses the causes of visual discomfort from video display terminals and explains how to comfortably use a computer monitor
Total Health At The Computer
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Author : Martin Sussman
language : en
Publisher:
Release Date : 1993
Total Health At The Computer written by Martin Sussman and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1993 with Health & Fitness categories.
Describes the symptoms of computer stress syndrome, tells how to set up a computer workspace, and offers advice on work posture, breathing, eye exercises, and electromagnetic fields.
Vision Reading Difficulties And Visual Stress
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Author : Arnold J. Wilkins
language : en
Publisher: Springer Nature
Release Date : 2022-08-02
Vision Reading Difficulties And Visual Stress written by Arnold J. Wilkins and has been published by Springer Nature this book supported file pdf, txt, epub, kindle and other format this book has been release on 2022-08-02 with Medical categories.
This book provides an overview of the research surrounding the relevance of visual factors for those who struggle with reading. Visual interventions that have been advocated as helping with reading include spectacles that simply correct refractive errors (e.g., long-sightedness), coloured overlays (sheets placed on the page) and coloured lenses, vision therapy, and computer games. This book explains the rationale behind these interventions and discusses the evidence supporting them. Clear advice is given in plain English to those wondering if these interventions will be helpful. Vision, Reading Difficulties, and Visual Stress, 2nd Edition draws together disparate research findings in a range of neurological disorders where vision is compromised by cortical hyperexcitability. Optometrists, orthoptists, ophthalmologists, educational psychologists, teachers, and vision scientists will find this book to be an interesting resource as well as students in these disciplines and parents of children who struggle with reading.
Effects Of Postural And Visual Stressors On Trigger Point Development Muscle Activity Blink Rate And Discomfort During Computer Work
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Author : Jeffrey Alexander Hoyle
language : en
Publisher:
Release Date : 2006
Effects Of Postural And Visual Stressors On Trigger Point Development Muscle Activity Blink Rate And Discomfort During Computer Work written by Jeffrey Alexander Hoyle and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2006 with Computer users categories.
Abstract: Objective: To assess the impacts of postural and visual stressors on musculoskeletal and visual function during computer use. Background: Computer use involves low level static exertions that may be influenced by the postural and visual parameters of the workstation. The mechanisms of musculoskeletal pain and visual discomfort underlying low level static exertions, such as those experienced during computer work, are poorly understood. It was hypothesized that static postural and visual stress experienced during computer work might synergistically contribute to trigger point development, resulting in myofascial pain, as well as symptoms of eyestrain. Methods: Twelve subjects (six male and six female) participated in a study that simulated computer work. Each subject participated in three separate one-hour sessions, performing a typing task under high and low postural and visual stress conditions. Musculoskeletal measures included trigger point development monitored via expert opinion and self-report, electromyographic (EMG) activity, as well as self-reported discomfort. Cyclic changes in the EMG median frequency, representative of motor unit rotation, as well as a central tendency measure were used to assess EMG activity at multiple muscle locations on the trapezius. Hence, a multi-channel array was used to monitor EMG differences between muscle spatial locations relative to the trigger point. Visual measures included EMG activity of the orbicularis oculi, blink rate, accommodation, and self-reported visual discomfort. Results: Myofascial trigger points developed in all subjects regardless of the stress condition. The most interesting finding was the interaction between postural and visual factors on both the musculoskeletal and visual systems. Both high postural and high visual stress conditions resulted in significantly fewer cyclic changes in median frequency (i.e. less motor unit rotation) across the trapezius, and reduced blink rate compared to the baseline low stress condition. Spatial location relative to the trigger point site on the trapezius also influenced EMG patterns. Conclusions: Results have shown the importance of considering both postural and visual factors in order to understand the nature of the health effects associated with computer work. Disorders related to this type of work may be influenced by the complex interaction between the physical and visual parameters of the task. A hypothesized injury pathway model leading to myofascial pain, MSDs, and visual system disturbances during computer work was presented. A central stress theory involving the autonomic nervous system was proposed to be the interactive mechanism affecting both musculoskeletal and visual loading. However, efforts to further understand the mechanisms through which this interaction occurs are needed.
Healthy Work
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Author : Namir Khan
language : en
Publisher: Scarecrow Press
Release Date : 2004
Healthy Work written by Namir Khan and has been published by Scarecrow Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2004 with Health & Fitness categories.
This reference provides an overview of relevant literature to engineers, managers, accountants, occupational health and safety specialists, and industrial hygienists, so that they, and other professionals, can understand what has caused our workplaces to become primary sources of physical and mental illness.
Visual Stress
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Author : Arnold J. Wilkins
language : en
Publisher: OUP Oxford
Release Date : 1995-02-23
Visual Stress written by Arnold J. Wilkins and has been published by OUP Oxford this book supported file pdf, txt, epub, kindle and other format this book has been release on 1995-02-23 with Medical categories.
This book provides the first general and unified theory of visual discomfort. The theory is based on the observation that people find certain visual stimuli uncomfortable, and that these same stimule induce seizures in patients with photosensitive epilepsy. The theory is applied to a variety of everyday problems such as eye strain from reading, lighting, television and VDU terminals, and more generally from design. A variety of techniques for preventing and treating visual discomfort are described.