My optician's office charges an extra $100 for blue light filtering. They at least make it clear it's optional but recommended for frequent screen use.
1) it corrected my eye with a slight astigmatism, but over corrected my other eye, so the agregate was pretty much the same
2) the aformentioned blue filter, which is part of the anti-glare coating.
3) my non-astigmatic eye was incorrectly marked with a prescription
4) I don't actually need glasses because I can see to the bottom of the eye chart without them. Its just as I'm now older, my vision is not as good as they used to be.
5) these were designed for "close work" but actually don't really help me focus closer to me.
However, arguing that, as a non-proffesional with only a passing understanding of optics (non-biological) with a large multinational company doesn't seem like a good use of time.