• Kalash@lemmy.world
    link
    fedilink
    arrow-up
    22
    ·
    2 years ago

    The meme actually uses the exact same image as the wiki page about the tests. https://en.wikipedia.org/wiki/Ishihara_test

    The number “74” should be clearly visible to viewers with normal color vision. Viewers with red-green color blindness will read it as “21”

    So at least I’m seeing what I was supposed to see!

    • zefiax@lemmy.world
      link
      fedilink
      arrow-up
      2
      ·
      2 years ago

      so with your 21, do you actually see a colour difference between the numbers and the circle or is it a brightness difference?

      • Kalash@lemmy.world
        link
        fedilink
        arrow-up
        5
        ·
        edit-2
        2 years ago

        Yeah, the number is in green and the background circles are light brown to beige.

        • zefiax@lemmy.world
          link
          fedilink
          arrow-up
          5
          ·
          2 years ago

          That is absolutely fascinating as I can’t see any hints of a 2 or how what I see as 7 becomes a 2.

          • Kaijobu@discuss.tchncs.de
            link
            fedilink
            arrow-up
            2
            ·
            2 years ago

            I think I found the 2. Look at the 7 again and slightly to the right of it. The background dots are colored slightly darker brown compared to the rest of the background. Trying to focus on these brown dots instead of the green 7, you can make out the slightly shifted 2.

            Didn’t see it until many people here referred to a 2.