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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

    pierre_pebble@mastodon.ieP This user is from outside of this forum
    pierre_pebble@mastodon.ieP This user is from outside of this forum
    pierre_pebble@mastodon.ie
    wrote sidst redigeret af
    #36

    @Danpiker this is absolutely wild! It definitely works for me

    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

      johncomic@beige.partyJ This user is from outside of this forum
      johncomic@beige.partyJ This user is from outside of this forum
      johncomic@beige.party
      wrote sidst redigeret af
      #37

      @Danpiker not really seeing it #MaybeThatsJustMe

      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

        keithwm@mastodon.socialK This user is from outside of this forum
        keithwm@mastodon.socialK This user is from outside of this forum
        keithwm@mastodon.social
        wrote sidst redigeret af
        #38

        @Danpiker 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

          zombiecide@polyglot.cityZ This user is from outside of this forum
          zombiecide@polyglot.cityZ This user is from outside of this forum
          zombiecide@polyglot.city
          wrote sidst redigeret af
          #39

          @Danpiker minimally, but the dots hurt because at the boundaries there are flecks greyish-whitish visual noise

          1 Reply Last reply
          0
          • conchoid@mastodon.gamedev.placeC conchoid@mastodon.gamedev.place

            @Danpiker i don't see it

            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
            #40

            @conchoid @Danpiker

            Me either.

            1 Reply Last reply
            0
            • itgrrl@infosec.exchangeI itgrrl@infosec.exchange

              @Danpiker

              a #ProTip for those playing along at home – if you have “night shift” (iOS) or “eye comfort” (Android) on you’ll probably need to turn it off to see the effect, otherwise all the dots will just look purple 💁‍♀️

              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
              #41

              @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 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

                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
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