Comment on If there's a sort of "apocalyptic" event but there are still surviving communities, will people be able to make eyeglasses again, or are people with vision issues gonna be fucked?

• Zer0_F0x@lemmy.world ⁨4⁩ ⁨weeks⁩ ago

  Some glass is many sheets glued together, that could be trickier to work with

  Thick glass that’s not tempered will be the easiest to work with

  Pretty much any piece of glass and a series of sandpapers going from low to high grit will eventually work if you know what you’re doing

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  • ivanafterall@lemmy.world ⁨4⁩ ⁨weeks⁩ ago

    That’s pretty crazy.

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• Nibodhika@lemmy.world ⁨4⁩ ⁨weeks⁩ ago

  Yes, it’s not magic, it’s just the shape of the glass that makes the focus point of images be slightly closer or further apart.

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• EnsignWashout@startrek.website ⁨4⁩ ⁨weeks⁩ ago

  Can I find a broken window and start sanding it with sandpaper, as an extreme example?

  Yes, provided you have a way to polish it back TU transparent again, after changing the shape.

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  • ivanafterall@lemmy.world ⁨4⁩ ⁨weeks⁩ ago

    Ohhhh, cool. I knew it was glass, but I guess I did kind of think there was some magic going on in there somewhere. Way simpler than I realized.

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• AbouBenAdhem@lemmy.world ⁨2⁩ ⁨weeks⁩ ago

  Just saw a YouTube documentary that reminded me of this comment—it describes how Galileo made his lenses by hand from window glass using an artillery ball as a grinder.

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• HeyThisIsntTheYMCA@lemmy.world ⁨4⁩ ⁨weeks⁩ ago

  i feel like there’s some sort of childhood song about the dangers of silicosis we were supposed to learn but praise mandela didn’t

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  • ivanafterall@lemmy.world ⁨3⁩ ⁨weeks⁩ ago

    Silicosis sounds so silly!

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    • HeyThisIsntTheYMCA@lemmy.world ⁨3⁩ ⁨weeks⁩ ago

      Image

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