• shalafi@lemmy.world
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    2 小时前

    My guy doesn’t do this except for a quick sanity check. Or maybe because patients expect it? They have your prescription the second you look in the auto focusing machine. Hell, someone invented a lens for a cell phone that does it.

    The optometrist is looking at your eyeball health and related medical issues. The clicky thing is mostly performative.

  • Karyoplasma@discuss.tchncs.de
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    9 小时前

    If you don’t see a difference, you are already very close to the optimal correction and a subtle change in either direction is unnecessary. They will still go ahead and try fine-tuning the prescription and when you tell them that A and B are the same, they can fall back when they add another correction. A and B might currently be the same, but if you add C, A+C could be better than B+C.

  • Chaos0f7ife@lemmy.world
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    10 小时前

    You know, it makes me wonder how that works. Because most of the time, they get the prescription right, even though, for the most part, we only guess which one feels right to us, even though, to us, one and two look practically the same.

    • rImITywR@lemmy.world
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      10 小时前

      If one and two look the same to you, does it matter which one is prescribed? Can you even say that the prescription is correct?

      • superkret@feddit.org
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        7 小时前

        If they look the same, you are prescribed the weaker of the two, to avoid overcorrection, which can worsen your eyesight over time.

        • kn33@lemmy.world
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          6 小时前

          I haven’t done a test since I was a child because I generally do fine, but I wonder if some people need additional instruction about what to look for. Like the two “look the same” because they don’t know what to look for. Maybe just a “Is the apostrophe a line or a dot? Okay, how about now?”

        • Aurenkin@sh.itjust.works
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          7 小时前

          One, or two, which is better? They’re just questions, odd, designed to determine the optimal perscription. Shall we continue? Describe in single words, only the good things that come to mind about your eyesight.

    • rockerface 🇺🇦@lemm.ee
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      10 小时前

      I think part of the image processing is done subconsciously and so we can pick up the minute differences in image quality by feel, even when we can’t say what exactly is different.

      • Chaos0f7ife@lemmy.world
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        10 小时前

        That makes sense. Our subconscious is better at picking up the small details than our conscious mind, because it takes more effort for us to think about it. That’s why they say “go with your gut” because our brains calculate things subconsciously. It’s why we can do things without thinking about it.

    • Jesus_666@lemmy.world
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      10 小时前

      My guess is that if one and two look the same, both are equally close to ideal and thus it doesn’t matter which one you pick.

  • Zefjor@lemmy.world
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    9 小时前

    Where I’m from, optometrists always ask “one, two, or are both the same?” I’ve never had any issue with that.