I was suffering through a short bout of ‘computer fatigue’ the other day – oh, it’s a real collection of symptoms, believe me, but I doubt it would be enough to get you off of work. You may have even experienced it yourself: the strain persists on the bridge of your nose, the area between the eyes; blurry vision, a metallic taste in your mouth, headaches and slight dizziness – all at a degree that doesn’t justify a run to the doctors but that still affects your productivity enough to make you sit up and take notice.