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 ? ”
A field study of supplementary rest breaks for data-entry operators
This study examined the effects of supplementary rest breaks on musculoskeletal discomfort , eyestrain , mood , and performance in data -entry workers . Two rest break schedules were compared in a within-subjects design . Workers alternated between a ‘ conventional ’ and a ‘ supplementary ’ schedule in 4-week intervals . The conventional schedule contained a 15-min break during the first half of the work shift and a 15-min break during the second half of the shift . The supplementary schedule contained the same two 15-min breaks , and a 5-min break during each hour which otherwise did not contain a break , for a total of 20 extra minutes of break time . Results are based on data from 42 workers . They indicated that discomfort in several areas of the body , and eyestrain , were significantly lower under the supplementary than under the conventional schedule . While symptoms increased from pre- to post-work periods under both schedules , the magnitude of the increases was significantly less under the supplementary schedule . In addition , increases in discomfort of the right forearm , wrist and h and over the course of the work week under the conventional schedule were eliminated under the supplementary schedule . These beneficial effects were obtained without reductions in data -entry performance
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 ? ”