How far can human vision be improved with lenses?

Question

I currently have 20/15 vision after laser eye surgery, which is clearer than 20/20. However when tested with optician lenses, certain lenses improved clarity. I understand 20/20 is not “perfect” vision, so how much can human vision be enhanced by lenses. Or is it just how telescopes and binoculars work.

In: Physics

Answer 1

The latter. Any lens you add, even if you only gain 20/1, functionally is just a really tiny binocular.