Yes, the screen is a plane at almost constant distance from the seated eyes = a single constant correction for the correct range is best. So carry the correct s

Yes, the screen is a plane at almost constant distance from the seated eyes = a single constant correction for the correct range is best. So carry the correct single range reading glasses for when you use a screen. For the real world where far away is typically glanced up to view and the flat desktop ranges further fits the progessive lens. This is what I have. Glasses of real glass that I use for the screen only and keep them there, both my eyes differ, so Walmart plastic readers do not work (I suppose I could buy two pairs and swap the lenses using a blow dryer to soften the frame to swap the lenses.) I prefer true glass lanses = they do not scratch at all in daily uses - the plastic lenses soon accululate all mannr of tiny scratches which I hate. For real world use I have progressive lenses and you soon adapt to the slight head motion to move the perfect focus zone onto your eye (fovea range fitting) I have seen some glasses sold online a few years ago with a hydraulic squeeze bulb that moves the lenses apart/together as you adjust the squeeze.A google just now could not find them = failed idea?? A tesla type radar that autofocussed would work? Many cameras have autofocus and a light weight focus adjuster that moved the lenses should be makeable? (there might be one sold now since they have autofucus on cell phones = why not eyeglasses??) The Chinese sliding lenses made of molded plastic to achieve a similar effect, but fail badly in execution. The lenses are terrible ripply quality. I bought a pair from Aliexpress for $4. All plastic = not worth buying. The same thing is being spammed at $50 or more in the USA, same crap, you will toss the same day you get them.. That said, the idea is valid and of they made it with glass lenses they could work for many uses. I expect they are out there somewhere?