Comment on My glasses

justme@lemmy.dbzer0.com ⁨14⁩ ⁨hours⁩ ago

• Redjard@reddthat.com ⁨10⁩ ⁨hours⁩ ago

  I assumed he’d estimated it based on how distorted the face appears behind the glasses. I do that all the time.

  At this angle it’s hard for me to do that, since I usually use the edges of the face to estimate it. negative glasses pull the line inwards, positive outwards. I can reliably tell when someone is wearing fake glasses (0 strength) for example, and probably estimate strength within 30% of the actual value.

  If the image was higher res maybe I could estimate this case too. Or this professional optometrist is just a lot better at it than I am.

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  Strong negative glasses: (Note the faces contours in the glasses appearing well inside the faces contours around the glassed)

  Image

  Fake glasses:

  Image

  Positive glasses:

  Image

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  PS: Searching for generic terms yields 100% fake glasses, so I took a specific person I remember having strong glasses for myopia.

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  • justme@lemmy.dbzer0.com ⁨9⁩ ⁨hours⁩ ago

    Just looked in the mirror… Checks out! :)

    Thanks for the explanation. And yeah, on the op picture you can’t see any of that clearly, so he needs to have serious practice for that statement.

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    • Bluewing@lemmy.world ⁨9⁩ ⁨hours⁩ ago

      I’m sure Jonathan was able to provide the exact prescription at a glance.

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• betterdeadthanreddit@lemmy.world ⁨14⁩ ⁨hours⁩ ago

  It’s measuring in Imperial Corrective Units (ICU).

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  • justme@lemmy.dbzer0.com ⁨13⁩ ⁨hours⁩ ago

    Let me guess… It counts how many visits to the ICU it took to get such bad eye sight?

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    • betterdeadthanreddit@lemmy.world ⁨13⁩ ⁨hours⁩ ago

      Going for “I see you” with a plausible but bullshit unit name but yours works too. Maybe they keep getting into accidents and landing in the ICU because of poor eyesight.

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      • justme@lemmy.dbzer0.com ⁨12⁩ ⁨hours⁩ ago

        Aaah… So ist not the original prescription, rather the hit count. Like snipers carve lines in their rifle.

        Now it all comes together!

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