Moderate evidence was observed for : ( 1 ) no effect of workstation adjustment , ( 2 ) no effect of rest breaks and exercise and ( 3 ) positive effect of alternative pointing devices .
For all other interventions mixed or insufficient evidence of effect was observed .
Conclusion : Few high quality studies were found that examined the effects of interventions in the office on musculoskeletal or visual health
Background : The literature examining the effects of workstation , eyewear and behavioral interventions on  musculoskeletal and visual symptoms among computer users is large and heterogeneous .
Methods : A systematic review of the literature used a best evidence synthesis approach to address the general question “ Do office interventions among computer users have an effect on musculoskeletal or visual health ? ”
Productivity associated with visual status of computer users.
BACKGROUND 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 . METHODS Inclusion criteria required subjects 19 to 30 years of age with complete vision examinations before being enrolled . Using a double-masked , placebo-controlled , r and omized 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 population s ; ( 2 ) nonsense word search ; and ( 3 ) a modified text-editing task . RESULTS 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 . CONCLUSIONS 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
Moderate evidence was observed for : ( 1 ) no effect of workstation adjustment , ( 2 ) no effect of rest breaks and exercise and ( 3 ) positive effect of alternative pointing devices .
For all other interventions mixed or insufficient evidence of effect was observed .
Conclusion : Few high quality studies were found that examined the effects of interventions in the office on musculoskeletal or visual health
Background : The literature examining the effects of workstation , eyewear and behavioral interventions on  musculoskeletal and visual symptoms among computer users is large and heterogeneous .
Methods : A systematic review of the literature used a best evidence synthesis approach to address the general question “ Do office interventions among computer users have an effect on musculoskeletal or visual health ? ”