• Kalash@lemmy.world
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    1 year 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
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      1 year 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
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        1 year ago

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

        • zefiax@lemmy.world
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          1 year 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
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            1 year 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.