Focusing if you are older and having trouble with near vision

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    sciencemom
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    I’ve just assembled my foldscope and am having trouble focusing. The thing is, I can’t tell if it’s my eyes or not. I’m near 50 and recently started wearing bifocals and when I got them I had to specify a preferred reading distance, which is about 12 inches away from my face. when I’m looking through the foldscope I can’t figure out where I should be looking (which plane). I might not be able to focus on something held right by my eyes.

    I’m planning on dedicating one of my old cell phones to use with this microscope (it’s charging now), but I’m wondering inf anybody else with near vision issues has been having the same problem.

    I used to do a lot of microscopy in grad school, but that was well before my bifocal phase.

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