This sounds useful in case you're the only survivor of a nuclear war and finally have time enough at last to read all the books you want, but end up breaking yo

This sounds useful in case you're the only survivor of a nuclear war and finally have time enough at last to read all the books you want, but end up breaking your glasses. While I would not be surprised at all there's something to this, things like "improve and enhance our vision and brain function, at any age, along with it our sleep, balance, attention, and our cognitive and mental health" kind of set off my bullshit detector a bit. That seems way too many conditions to fix "with one easy trick!" Things like "go out and have a walk" also exposes you to fresh air, and even mild exercise can make you feel better for all sorts of reasons. Is it really primarily about the vision system as the article says? Not so clear to me. This sounds a bit too much of a tunnel-visioned viewpoint.