A mirror presents a reversed world, as viewed through a 'virtual eye'. That is, if you were to place your eye at the place where the eye's image would be, the rays of light would still be unaltered.
But the 'virtual eye' would suffer the same effects as the real eye: an image in the mirror is still out of focus for a person whose distant vision is out of focus.
It should be noted in passing, that optometrists use a reflection of the eye-chart for eye tests. That is, the eye-chart is reversed, and behind you. You look in the mirror and see it in the correct sense, but essentially twice across the room. In this way you can get a 20-foot distance inside a 10-foot room.
I used to have one of those mirrors with magnification on one side. This does not really help.
With a spyglass (say a pair of binoculars or a monocular (half of a binoculars)), it is possible to adjust the focus at the eye peice that you can see unaided things far away. I carry one of these in my dillie, that i might read the bus numbers without glasses (i normally wear reading glasses going out, since these are more suited to business and shopping).