It's All A Blur
That's been my experience in putting eyeliner on my left eye, because my right one appears to be farsighted. All I need is a +1 correction -- low-level reading glasses. I joked about finding a monocle, but it turns out there's such a thing as makeup application glasses, and they're pretty cheap on Amazon. About $9, give or take a few shekels.

Those seem to take a while to hit your mailbox, so here are more.

These are snazzy:

These are the cheapest, at around $7. But they're 2.5x magnification, which I don't need.