> Using it outside of its intended distance will cause eye strain since your eyes won't be able to focus properly.

I don't find that at all, personally. I wear my computer glasses almost all the time in the house and just let myself not try to focus on things. If anything it seems to be better than my normal distance lenses for eye strain, for me, because my eyes do try to focus with my normal lenses since it's supposed to be perfectly clear, where I know there's a good reason they're not in focus when I'm not wearing them.

My distance glasses have progressive lenses, which may be part of that, as there's different strength depending on where you're looking at in the glasses. I've been tempted to remove progressive lenses from my next pair, as I tend to take them off to read anyway, and then I'd get a flat prescription like I have on my computer lenses.