• squaresinger@lemmy.world
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      12 hours ago

      Try it out. Take a mirror, put it very close to your eye but angled sideways, since you can obviously not look through your head.

      You will have no issues at all focussing on what you are looking at, since you aren’t looking at the mirror at all.

      You can also try that while looking at yourself through a dirty mirror. You can either focus on the dirt on the mirror or on your face. You can’t see both the dirt and your face in focus at the same time.

      • stebo@sopuli.xyz
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        12 hours ago

        i think it should be a concave mirror with a focal point on your retina for it to work

        • squaresinger@lemmy.world
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          12 hours ago

          Nah, doesn’t have to be. Just try putting a mirror very close to your eye, but angled sideways. You will be able to focus onto anything you want without issue. Because you aren’t focussing at the mirror, but at the thing you look at.