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  3. This illusion was new to me.

This illusion was new to me.

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  • danpiker@mathstodon.xyzD danpiker@mathstodon.xyz

    This illusion was new to me. Does whichever dot you look at turn more purple?

    Pretty neat how clearly this lets you see the reduced sensitivity to blue light in the very centre of your vision.

    https://www.schulz-hildebrandt.com/9-purple-dots-illusion/

    https://arxiv.org/abs/2509.11582

    barbarast@mastodon.nlB This user is from outside of this forum
    barbarast@mastodon.nlB This user is from outside of this forum
    barbarast@mastodon.nl
    wrote sidst redigeret af
    #42

    @Danpiker dit is heel cool 💜💙

    1 Reply Last reply
    0
    • danpiker@mathstodon.xyzD danpiker@mathstodon.xyz

      This illusion was new to me. Does whichever dot you look at turn more purple?

      Pretty neat how clearly this lets you see the reduced sensitivity to blue light in the very centre of your vision.

      https://www.schulz-hildebrandt.com/9-purple-dots-illusion/

      https://arxiv.org/abs/2509.11582

      claudius@darmstadt.socialC This user is from outside of this forum
      claudius@darmstadt.socialC This user is from outside of this forum
      claudius@darmstadt.social
      wrote sidst redigeret af
      #43

      @Danpiker oh that one is cool! I also have never seen this particular one.

      loke@functional.cafeL 1 Reply Last reply
      0
      • danpiker@mathstodon.xyzD danpiker@mathstodon.xyz

        This illusion was new to me. Does whichever dot you look at turn more purple?

        Pretty neat how clearly this lets you see the reduced sensitivity to blue light in the very centre of your vision.

        https://www.schulz-hildebrandt.com/9-purple-dots-illusion/

        https://arxiv.org/abs/2509.11582

        florapis@toot.walesF This user is from outside of this forum
        florapis@toot.walesF This user is from outside of this forum
        florapis@toot.wales
        wrote sidst redigeret af
        #44

        @Danpiker oh yes!

        1 Reply Last reply
        0
        • danpiker@mathstodon.xyzD danpiker@mathstodon.xyz

          This illusion was new to me. Does whichever dot you look at turn more purple?

          Pretty neat how clearly this lets you see the reduced sensitivity to blue light in the very centre of your vision.

          https://www.schulz-hildebrandt.com/9-purple-dots-illusion/

          https://arxiv.org/abs/2509.11582

          etche_homo@mas.toE This user is from outside of this forum
          etche_homo@mas.toE This user is from outside of this forum
          etche_homo@mas.to
          wrote sidst redigeret af
          #45

          @Danpiker I love this. I know I have low blue macular sensitivity because blue neon signs at night have always been blurry to me to read. But it's cool to map the actual size - blotchy on retina, not a defined spot, redder areas in the purple circle. Thanks for sharing, and readers for further links!

          1 Reply Last reply
          0
          • danpiker@mathstodon.xyzD danpiker@mathstodon.xyz

            This illusion was new to me. Does whichever dot you look at turn more purple?

            Pretty neat how clearly this lets you see the reduced sensitivity to blue light in the very centre of your vision.

            https://www.schulz-hildebrandt.com/9-purple-dots-illusion/

            https://arxiv.org/abs/2509.11582

            bafdyce@chaos.socialB This user is from outside of this forum
            bafdyce@chaos.socialB This user is from outside of this forum
            bafdyce@chaos.social
            wrote sidst redigeret af
            #46

            @Danpiker Who installed this eye tracking software on my phone without permission? 🤔

            jill@mastodon.deJ 1 Reply Last reply
            0
            • danpiker@mathstodon.xyzD danpiker@mathstodon.xyz

              This illusion was new to me. Does whichever dot you look at turn more purple?

              Pretty neat how clearly this lets you see the reduced sensitivity to blue light in the very centre of your vision.

              https://www.schulz-hildebrandt.com/9-purple-dots-illusion/

              https://arxiv.org/abs/2509.11582

              solitha@mastodon.socialS This user is from outside of this forum
              solitha@mastodon.socialS This user is from outside of this forum
              solitha@mastodon.social
              wrote sidst redigeret af
              #47

              @Danpiker Aha! It did not work for me on my old 2010-era emachine monitor, but when I dragged it over to my brand-new Asus monitor the effect was immediately noticeable.

              Edit to add: On the older monitor, the color of the dots matters a lot more on my angle to the graphic. My first thought was that the top row looked much lighter! But that changed if I lifted myself a bit higher.

              1 Reply Last reply
              0
              • truenorthspice@mastodon.worldT truenorthspice@mastodon.world

                @itgrrl @Danpiker

                Using my laptop with no night mode or colour blocking, it doesn't work for me. Maybe some brains are wired differently.

                solitha@mastodon.socialS This user is from outside of this forum
                solitha@mastodon.socialS This user is from outside of this forum
                solitha@mastodon.social
                wrote sidst redigeret af
                #48

                @TrueNorthSpice @itgrrl It can be about your electronics, too. I can see the effect on my new monitor, but not on my old one.

                truenorthspice@mastodon.worldT 1 Reply Last reply
                0
                • mwichary@mastodon.onlineM mwichary@mastodon.online

                  @Danpiker Oh, wow. It does, and incredibly quickly and intensely, too.

                  normaloperator@mas.toN This user is from outside of this forum
                  normaloperator@mas.toN This user is from outside of this forum
                  normaloperator@mas.to
                  wrote sidst redigeret af
                  #49

                  @mwichary @Danpiker Same. My experience is super trippy, close or far. The effect is immediate and distinct when I move my eye. Could be all that time staring at the sun.

                  1 Reply Last reply
                  0
                  • crazyeddie@mastodon.socialC crazyeddie@mastodon.social

                    @wcbdata @Danpiker Using a laptop. Yoga 910. Quick duck search leads me to believe there's no such filter on its screen. My night light shift software isn't on.

                    vOv

                    solitha@mastodon.socialS This user is from outside of this forum
                    solitha@mastodon.socialS This user is from outside of this forum
                    solitha@mastodon.social
                    wrote sidst redigeret af
                    #50

                    @crazyeddie @wcbdata I found the effect was visible on one of my dual monitors, a new one, but not on the old one.

                    1 Reply Last reply
                    0
                    • claudius@darmstadt.socialC claudius@darmstadt.social

                      @Danpiker oh that one is cool! I also have never seen this particular one.

                      loke@functional.cafeL This user is from outside of this forum
                      loke@functional.cafeL This user is from outside of this forum
                      loke@functional.cafe
                      wrote sidst redigeret af
                      #51

                      @claudius @Danpiker For me, it's even more weird. If I focus on one of the dots, all the other slowly fade out until it's completely blue, except the one I'm looking at.

                      1 Reply Last reply
                      0
                      • bafdyce@chaos.socialB bafdyce@chaos.social

                        @Danpiker Who installed this eye tracking software on my phone without permission? 🤔

                        jill@mastodon.deJ This user is from outside of this forum
                        jill@mastodon.deJ This user is from outside of this forum
                        jill@mastodon.de
                        wrote sidst redigeret af
                        #52

                        @BafDyce @Danpiker 🤣

                        1 Reply Last reply
                        0
                        • solitha@mastodon.socialS solitha@mastodon.social

                          @TrueNorthSpice @itgrrl It can be about your electronics, too. I can see the effect on my new monitor, but not on my old one.

                          truenorthspice@mastodon.worldT This user is from outside of this forum
                          truenorthspice@mastodon.worldT This user is from outside of this forum
                          truenorthspice@mastodon.world
                          wrote sidst redigeret af
                          #53

                          @solitha @itgrrl

                          You may have a valid point, my laptop is 14 years old

                          1 Reply Last reply
                          0
                          • danpiker@mathstodon.xyzD danpiker@mathstodon.xyz

                            This illusion was new to me. Does whichever dot you look at turn more purple?

                            Pretty neat how clearly this lets you see the reduced sensitivity to blue light in the very centre of your vision.

                            https://www.schulz-hildebrandt.com/9-purple-dots-illusion/

                            https://arxiv.org/abs/2509.11582

                            bodhipaksa@mastodon.scotB This user is from outside of this forum
                            bodhipaksa@mastodon.scotB This user is from outside of this forum
                            bodhipaksa@mastodon.scot
                            wrote sidst redigeret af
                            #54

                            @Danpiker This worked for me. Sometimes two or three dots on the same row would appear purple. If I keep my focus fixed on one dot the others often disappear.

                            (MacBook Pro monitor.)

                            1 Reply Last reply
                            0
                            • danpiker@mathstodon.xyzD danpiker@mathstodon.xyz

                              This illusion was new to me. Does whichever dot you look at turn more purple?

                              Pretty neat how clearly this lets you see the reduced sensitivity to blue light in the very centre of your vision.

                              https://www.schulz-hildebrandt.com/9-purple-dots-illusion/

                              https://arxiv.org/abs/2509.11582

                              vayllarkinpoet@disabled.socialV This user is from outside of this forum
                              vayllarkinpoet@disabled.socialV This user is from outside of this forum
                              vayllarkinpoet@disabled.social
                              wrote sidst redigeret af
                              #55

                              @Danpiker I had the same issue as others, of being unable to look Only at one dot. When I stopped trying and just let my vision kind of skate between them though, they All started turning purple, which was cool. (Will mention I have both visual processing junk and non-Blind visual disabilities, but maybe anyone who switched focus often enough would get this?) ... Now I'm trying to figure out how to determine the periodic exposure necessary to maintain purple for all, oh no! ...rolls nerdily off

                              1 Reply Last reply
                              0
                              • danpiker@mathstodon.xyzD danpiker@mathstodon.xyz

                                This illusion was new to me. Does whichever dot you look at turn more purple?

                                Pretty neat how clearly this lets you see the reduced sensitivity to blue light in the very centre of your vision.

                                https://www.schulz-hildebrandt.com/9-purple-dots-illusion/

                                https://arxiv.org/abs/2509.11582

                                fembot@mstdn.socialF This user is from outside of this forum
                                fembot@mstdn.socialF This user is from outside of this forum
                                fembot@mstdn.social
                                wrote sidst redigeret af
                                #56

                                @Danpiker

                                The longer I look at a particular dot the more the other dots disappear completely into the blue background, although that last remaining dot doesn't turn more purple.

                                If I look at the whole field I can also see faint green shadow dots that move as I move my eyes, and which also disappear into the background. 👀

                                1 Reply Last reply
                                0
                                • danpiker@mathstodon.xyzD danpiker@mathstodon.xyz

                                  This illusion was new to me. Does whichever dot you look at turn more purple?

                                  Pretty neat how clearly this lets you see the reduced sensitivity to blue light in the very centre of your vision.

                                  https://www.schulz-hildebrandt.com/9-purple-dots-illusion/

                                  https://arxiv.org/abs/2509.11582

                                  atif@mathstodon.xyzA This user is from outside of this forum
                                  atif@mathstodon.xyzA This user is from outside of this forum
                                  atif@mathstodon.xyz
                                  wrote sidst redigeret af
                                  #57

                                  @Danpiker works on phone, but not on pc! (night light turned off)

                                  1 Reply Last reply
                                  0
                                  • danpiker@mathstodon.xyzD danpiker@mathstodon.xyz

                                    This illusion was new to me. Does whichever dot you look at turn more purple?

                                    Pretty neat how clearly this lets you see the reduced sensitivity to blue light in the very centre of your vision.

                                    https://www.schulz-hildebrandt.com/9-purple-dots-illusion/

                                    https://arxiv.org/abs/2509.11582

                                    dasgrueneblatt@wien.rocksD This user is from outside of this forum
                                    dasgrueneblatt@wien.rocksD This user is from outside of this forum
                                    dasgrueneblatt@wien.rocks
                                    wrote sidst redigeret af
                                    #58

                                    @Danpiker wtf

                                    1 Reply Last reply
                                    0
                                    • danpiker@mathstodon.xyzD danpiker@mathstodon.xyz

                                      This illusion was new to me. Does whichever dot you look at turn more purple?

                                      Pretty neat how clearly this lets you see the reduced sensitivity to blue light in the very centre of your vision.

                                      https://www.schulz-hildebrandt.com/9-purple-dots-illusion/

                                      https://arxiv.org/abs/2509.11582

                                      samikki@mastodontti.fiS This user is from outside of this forum
                                      samikki@mastodontti.fiS This user is from outside of this forum
                                      samikki@mastodontti.fi
                                      wrote sidst redigeret af
                                      #59

                                      @Danpiker What is cool that I don't see the effect with my blue-mirrored transition glasses but can see without.

                                      1 Reply Last reply
                                      0
                                      • danpiker@mathstodon.xyzD danpiker@mathstodon.xyz

                                        This illusion was new to me. Does whichever dot you look at turn more purple?

                                        Pretty neat how clearly this lets you see the reduced sensitivity to blue light in the very centre of your vision.

                                        https://www.schulz-hildebrandt.com/9-purple-dots-illusion/

                                        https://arxiv.org/abs/2509.11582

                                        irina@wandering.shopI This user is from outside of this forum
                                        irina@wandering.shopI This user is from outside of this forum
                                        irina@wandering.shop
                                        wrote sidst redigeret af
                                        #60

                                        @Danpiker All the dots look purplish to me anyway. Perhaps very very slightly.

                                        1 Reply Last reply
                                        0
                                        • danpiker@mathstodon.xyzD danpiker@mathstodon.xyz

                                          This illusion was new to me. Does whichever dot you look at turn more purple?

                                          Pretty neat how clearly this lets you see the reduced sensitivity to blue light in the very centre of your vision.

                                          https://www.schulz-hildebrandt.com/9-purple-dots-illusion/

                                          https://arxiv.org/abs/2509.11582

                                          ellenb@mastodon.socialE This user is from outside of this forum
                                          ellenb@mastodon.socialE This user is from outside of this forum
                                          ellenb@mastodon.social
                                          wrote sidst redigeret af
                                          #61

                                          @Danpiker Yep, immediately. Do I have a super power?

                                          1 Reply Last reply
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