VR and AR stuff usually has a focal distance of 4-6 feet forward of the actual lenses, for what it's worth.
I worked for a time in an AR research lab and there are teams making good progress on adjustable focal lengths. The demo I saw three years ago was impressive.
Oh please let this be true
I'm not longsighted but my myopia has really progressed in my 40s. The Viture XR Pro has myopia dials which means that I can dial both to suit, but unfortunately the whole setup is awful for productivity, especially on Linux. Their android app is also just a "toy". And I definitely can't imagine using them for AR. Maybe their competitors, XREAL (which claim 6dof) are better here, but they don't have the myopia dials.