About a year ago, a health and safety expert berated me for having my computer screen below eye level - bad for my posture, apparently
Trustingly, I put the screen on a stand and suffered the up-and-down head motion of non-touch typing and screen checking.
On the basis of advice today, bearing in mind that I have specs with vari-focal lenses, I have removed the stand - and things are soooo much better
I can now type and read the screen without too much effort and hope that I will be less tired at the end of the working day
Moral: the H&S experts do not know everything