> degraded about -0.25 to -0.5 over the course of the day
FWIW my ophthalmologist made the point that most people working on computers have eyes go too dry toward the end of the day, and that also causes blurry vision. Try some eye drops.
> But I'm not sure really straining those muscles all-day-every-day is healthy long term.
Consider it "normal use of the muscle" and not straining and how normally using your muscles is considered good for you.
Personally, I expect a good chunk of the effect to be on the brain side, not in the physical muscle. Like how parents sometimes tell kids with a lazy eye to "use both your eyes". Keep the brain from giving up on it.
FWIW my ophthalmologist made the point that most people working on computers have eyes go too dry toward the end of the day, and that also causes blurry vision. Try some eye drops.
> But I'm not sure really straining those muscles all-day-every-day is healthy long term.
Consider it "normal use of the muscle" and not straining and how normally using your muscles is considered good for you.
Personally, I expect a good chunk of the effect to be on the brain side, not in the physical muscle. Like how parents sometimes tell kids with a lazy eye to "use both your eyes". Keep the brain from giving up on it.