The aim of this project is to examine the potential connection between the astigmatic refractive corrections of subjects using computers and their productivity and comfort. We hypothesize that improving the visual status of subjects using computers results in greater productivity, as well as improved visual comfort.
Inclusion criteria required subjects 19 to 30 years of age with complete vision examinations before being enrolled. Using a double-masked, placebo-controlled, randomized design, subjects completed three experimental tasks calculated to assess the effects of refractive error on productivity (time to completion and the number of errors) at a computer. The tasks resembled those commonly undertaken by computer users and involved visual search tasks of: (1) counties and populations; (2) nonsense word search; and (3) a modified text-editing task.
Estimates of productivity for time to completion varied from a minimum of 2.5% upwards to 28.7% with 2 D cylinder miscorrection. Assuming a conservative estimate of an overall 2.5% increase in productivity with appropriate astigmatic refractive correction, our data suggest a favorable cost-benefit ratio of at least 2.3 for the visual correction of an employee (total cost 268 dollars) with a salary of 25,000 dollars per year.
We conclude that astigmatic refractive error affected both productivity and visual comfort under the conditions of this experiment. These data also suggest a favorable cost-benefit ratio for employers who provide computer-specific eyewear to their employees.
"Employees using VDUs a large part of their working days frequently report their eyesight is quite badly affected at work and for some time afterwards. Daum (2002) strongly suggests that improving the visual status of workers using computers results in greater productivity in the workplace, as well as improved visual comfort. The visual symptoms can largely be resolved with proper management of the environment and by providing proper visual care for the employees (Sheddy 1992). "
[Show abstract][Hide abstract] ABSTRACT: ABSTRACT Computer work requires a certain posture which poses a considerable amount of strain on the worker’s body.
Repeated and forceful motions of the fingers, holding arms in static positions, and keeping hands in uncomfortable positions
lead to the symptoms of Carpal Tunnel Syndrome (CTS). The symptoms get the leverage when enough rest is not taken
throughout the workday. The symptoms of CTS get even worse in the night leading to disturbed sleep and discomfort. If not
attended in time, the symptoms may increase and the movement of the hand gets restricted. The objectives of the study were to
analyze the pain symptoms in fingers and wrists in software professionals and design a fitness program as an intervention to
reduce pain. The findings of the study reveal that the symptoms of carpal tunnel syndrome reduce if regular stretching of wrists
and fingers is done.
Studies on Ethno-Medicine 04/2012; 6(1):63-65. · 0.41 Impact Factor
"Furthermore, computer user surveys conducted at work consistently reported that vision and eye problems were the most frequently self-identified health problem (Collins et al., 1991; Smith et al., 1981; Dain et al., 1988). It has been demonstrated that the health effects associated with computer use impact productivity (Daum et al., 2004; DeRango et al., 2003). The use of computers has grown exponentially in the last 25 years. "
[Show abstract][Hide abstract] ABSTRACT: Examine the effects of two office ergonomics interventions in reducing visual symptoms at a private sector worksite.
A quasi-experimental study design evaluated the effects of a highly adjustable chair with office ergonomics training intervention (CWT group) and the training only (TO group) compared with no intervention (CO group). Data collection occurred 2 and 1 month(s) pre-intervention and 2, 6 and 12 months post-intervention. During each data collection period, a work environment and health questionnaire (covariates) and daily health diary (outcomes) were completed. Multilevel statistical models tested hypotheses.
Both the training only intervention (p<0.001) and the chair with training intervention (p=0.01) reduced visual symptoms after 12 months.
The office ergonomics training alone and coupled with a highly adjustable chair reduced visual symptoms. In replicating results from a public sector worksite at a private sector worksite the external validity of the interventions is strengthened, thus broadening its generalizability.
"Only Aaras et al. (1998, 2001) and Horgen et al. (2004) report on visual symptom changes resulting from both lighting changes and the use of corrective lenses. In a knowledge economy with growing numbers of workers using computers, visual strain can affect performance and overall workforce productivity (Daum et al., 2004). A large-scale intervention study was implemented in two US work places to examine the health consequences of providing workers with office ergonomics training and/or a new highly adjustable chair (Amick et al., 2003). "
[Show abstract][Hide abstract] ABSTRACT: Examine the effect of a multi-component office ergonomics intervention on visual symptom reductions.
Office workers were assigned to either a group receiving a highly adjustable chair with office ergonomics training (CWT), a training-only group (TO) or a control group (C). A work environment and health questionnaire was administered 2 and 1 month(s) pre-intervention and 3, 6, and 12 months post-intervention. Multi-level statistical models tested hypotheses.
The CWT intervention lowered daily visual symptoms (p < 0.01) post-intervention. The TO group did not significantly differ from the control group. The CWT group differed significantly from the TO group (p = 0.01) post-intervention.
Workers who received a highly adjustable chair and office ergonomics training had reduced visual symptoms and the effect was maintained through twelve months post-intervention. The lack of a training-only group effect supports implementing training in conjunction with the highly adjustable chair to reduce visual symptoms.
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