NEW YORK, March 1 -- We often spend long hours in front of a computer, smartphone or tablet when we're working. This overexposure puts significant pressure on our eyes and can have far-reaching consequences. We sometimes forget it, but the eye is a muscle which, by dint of being overworked, ends up being fatigued, impacting our daily well-being.

To better understand the scale of the phenomenon, VSP Vision Care, an insurance company specialising in vision health, teamed up with Workplace Intelligence to survey 800 HR managers and 800 full-time employees in the USA. The survey revealed that workers spend an average of 97 hours a week in front of a screen, including 34.2 hours on a computer. This figure is slightly higher than the 96.1 hour...