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 controlled study of the effect of neck school in medical secretaries.
The effect of " neck school " on neck and shoulder disorders was studied in medical secretaries . A  neck school reinforced with compliance enhancing measures ( group B ) was compared with a traditional neck school ( group A ) and a control group ( group C ) . The results show that ergonomical knowledge was good even before the secretaries attended the neck schools and that compliance was significantly higher for group B. When comparisons were made within groups some improvements on neck and shoulder fatigue and pain were noted , particularly for group B. When workload was controlled no significant group differences were found . No differences were noted for range of neck motion , or sick leave in any group . Our conclusion is that neck schools , despite good compliance , appear to be of limited clinical value for prevention of neck and shoulder disorders
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 ? ”