Poor eyesight? How about just being over 45?

My visual acuity at distance has not changed from when I was 20. My ability to read tiny, poorly-contrasted text at phone distance has.

Enlarging text size is a massive benefit to everyone as we age. It’s one of the reasons that older readers were among the first to adopt e-ink readers and tablets: every book suddenly becomes a large-print book. In the world of accessibility this is one of the easiest things to do with one of the largest impacts. Not everyone is blind, not everyone is hard of hearing, but everyone gets presbyopia if they live long enough.