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Using computer software packages to assist engineering activities
Published in David Salmon, Penny Powdrill, Mechanical Engineering Level 2 NVQ, 2012
Before considering details about software and hardware, it is important to think about health and safety issues. People spend a lot of time sitting in front of computer screens and this brings forth issues that should be considered. The main problems associated with working for extended periods at a computer workstation are as follows: Musculoskeletal problems. The main problems here are repetitive strain injury and stress to the back and upper limbs from sitting poorly.Visual tiredness and eye strain. The main problem here is tired eyes due to extended time at the workstation. Actual eye disease or permanent damage is not very likely. In association with tired eyes, thought needs to be given to the quality of the visual display unit (VDU), particularly screen glare and image quality.A person may also need to use different spectacles when working with a VDU.A problem for some people is that they become anxious while working with new technology and this stress makes them more tense and adds to the likelihood of musculoskeletal problems.Many people tend to spend long periods of time in front of the screen and this, coupled with poor posture, can lead to problems that could easily be alleviated by taking regular short breaks away from the screen.
Visual Perception
Published in Robert W. Proctor, Van Zandt Trisha, Human Factors in Simple and Complex Systems, 2018
Robert W. Proctor, Van Zandt Trisha
Eye discomfort or eye strain is usually caused by fatigue of accommodative and vergence muscles. This sort of discomfort is particularly problematic for people who engage in a lot of close work or spend a lot of time at a computer monitor. Displays that are close to the viewer require both more vergence and more accommodation, and if fixation on such displays is required for an entire workday, the eye muscles can (not surprisingly) get very tired.
Student workload assessment for online learning: An empirical analysis during Covid-19
Published in Cogent Engineering, 2022
Karingada Kochu Therisa Beena, Michael Sony
At the fourth position, students have perceived that online learning was hurried or rushed during Covid-19. This may be because initially the lockdown was announced when the country was unprepared (Lancet, 2020). Even educational institutes were not prepared to carry out online learning (Shobhit, 2020). So, it took time for these institutes to gear up to online learning and besides, the pressure of academic year competition might have led to the hurried pace of online learning. At fifth position was student’s perception that online learning was physically demanding during Covid-19. Most students in India access online content using handheld mobile devices (Shobhit, 2020). Online learning creates a physical strain on the eyes called digital eye strain when these small digital screens are used (Bhattacharya et al., 2020). Besides, online learning can also cause symptoms of MSD leading to physically tiredness (Amro et al., 2020). Thus, students felt online learning is physically demanding.
An ergonomics-driven QFD model to improve medical laboratory staff and patient satisfaction
Published in Theoretical Issues in Ergonomics Science, 2022
Amer M. Momani, Tasneem Al-Shaikh, Ahmad Abdelhafiz Mumani, Omar Al-Araidah
Visual fatigue is where the employees experience eye strain, because of long hours of working in front of computer screens and the exposure to screen rays, which result in muscle strain and itching eyes. Fatigue and stress are where the employees experience general aches and pain. Musculoskeletal disorders are where the employees experience wrist pain which is caused due to typing on keyboard and using the mouse in a wrong posture. Neck pain is what the employees experience due to wrong posture, bending over the patient’s documents and reports and the flexion of the neck beyond its normal limit, which occurs because the reception windows are positioned higher than normal sight view. Lower back pain is caused by wrong posture, lack of back support, and by repetitively reaching above shoulder level to grasp patients’ documents and reports.
Mobile touch screen device use and associations with musculoskeletal symptoms and visual health in a nationally representative sample of Singaporean adolescents
Published in Ergonomics, 2019
Siao Hui Toh, Pieter Coenen, Erin K. Howie, Swarup Mukherjee, David A. Mackey, Leon M. Straker
Similar to musculoskeletal symptoms, a greater amount of smartphone use was significantly associated with visual symptoms experienced during or after use of MTSDs and showed a clinically meaningful increase in risk of having visual symptoms. Visual symptoms reported included eye strain, tiredness of eyes and dry eyes. Prior research has shown that continuous computer use increased the risk of having visual symptoms, thought to be due to prolonged near vision work, impaired blink reflex and blue light emitted from screens (Gowrisankaran, Sheedy, and Albin 2015; Lurati 2018). Use of smartphone also involves near vision of the screen, which might thus explain its association with visual symptoms, especially when smartphone use was substantial and of longest bout length of use among all the devices. However, no association was found between tablet use and visual symptoms, which might again be due to the low tablet exposures in this sample.