Entirely serious question: is this something that can be trained? That is, after a long enough time of use and strengthening of the appropriate muscles and neural pathways, the headaches and such go away?
I think for some people, it won't be a problem. Much the same way some people have no issues spending hours using VR goggles without nausea. There are many people with accessibility issues who manage it, for example, and geeks who just like the idea of living in the future. In my experience, your eyes just get tired, even after you get used to it.
I think unless Apple has really added some sort of magic, it will be an issue for most people to use Vision Pro for anything but passive activities, or with a physical trackpad.
Surely you are already moving your eyes to look at click/tap targets anyway. Why would there be any additional muscle strain or neural pathways needed? Clearly moving our eyes doesn’t cause problems because we move them all the time as it is.
Maybe that's why some people prefer keyboard shortcuts; I don't move my eyes around the keyboard when typing, or when pressing Ctrl+S or Ctrl-C/Ctrl-V or in Windows I can Alt-Tab repeatedly and the highlight moves and I can looking around at the available windows while watching the selected one change with my peripheral vision. I can keep typing in a textbox for a bit while looking away, but with a virtual keyboard or speech to text which might be getting it wrong that's less of an option.
Compare with a smartphone, I can move to tap the 'back' button in Safari without moving my eyes to the back button. Looking "at" the phone generally is enough to see where my finger is, and say clicking on links I can look at the link and move my hand to it and move my eyes away while my hand is moving.
Having to coordinate looking and clicking - while I haven't tried it - I can imagine that feels more load-bearing, more effortful, more constraining, more annoying.
