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FARVEL BIG TECH
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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

    beckermatic@mastodon.laB This user is from outside of this forum
    beckermatic@mastodon.laB This user is from outside of this forum
    beckermatic@mastodon.la
    wrote sidst redigeret af
    #24

    @Danpiker It also creates a blue trail when I scroll the image up and down. Neat!

    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

      axel_hartmann@digitalcourage.socialA This user is from outside of this forum
      axel_hartmann@digitalcourage.socialA This user is from outside of this forum
      axel_hartmann@digitalcourage.social
      wrote sidst redigeret af
      #25

      @Danpiker - where to use?
      guest bathroom wallpaper or <insert evil laughter> tablecloth

      axel_hartmann@digitalcourage.socialA 1 Reply Last reply
      0
      • axel_hartmann@digitalcourage.socialA axel_hartmann@digitalcourage.social

        @Danpiker - where to use?
        guest bathroom wallpaper or <insert evil laughter> tablecloth

        axel_hartmann@digitalcourage.socialA This user is from outside of this forum
        axel_hartmann@digitalcourage.socialA This user is from outside of this forum
        axel_hartmann@digitalcourage.social
        wrote sidst redigeret af
        #26

        @Danpiker or: legal texts

        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

          bytebro@mastodonapp.ukB This user is from outside of this forum
          bytebro@mastodonapp.ukB This user is from outside of this forum
          bytebro@mastodonapp.uk
          wrote sidst redigeret af
          #27

          @Danpiker

          Doesn't seem to 'work' for me. I have no colour blindness of which I'm aware!

          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

            itgrrl@infosec.exchangeI This user is from outside of this forum
            itgrrl@infosec.exchangeI This user is from outside of this forum
            itgrrl@infosec.exchange
            wrote sidst redigeret af
            #28

            @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 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

              dsandler@mastodon.socialD This user is from outside of this forum
              dsandler@mastodon.socialD This user is from outside of this forum
              dsandler@mastodon.social
              wrote sidst redigeret af
              #29

              @Danpiker what's fascinating about this is that, as someone with deuteranomaly, _none_ of the dots is obviously purple for me, on any background. they all seem "blue, but if you told me they're actually purple, I would believe you", which is just really common for me.

              that must mean that the amount of short-wavelength sensitivity loss in the fixated area is not enough to offset the confusion (and overall lower information content) of overlapping long/medium wavelength response?

              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

                wcbdata@vis.socialW This user is from outside of this forum
                wcbdata@vis.socialW This user is from outside of this forum
                wcbdata@vis.social
                wrote sidst redigeret af
                #30

                @Danpiker TIL (from someone who said "this doesn't really work") - this doesn't work if your phone has a blue-light-blocking filter on it!

                crazyeddie@mastodon.socialC 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

                  darkoptimism@mstdn.socialD This user is from outside of this forum
                  darkoptimism@mstdn.socialD This user is from outside of this forum
                  darkoptimism@mstdn.social
                  wrote sidst redigeret af
                  #31

                  @Danpiker
                  Nothing happens for me

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

                    @Danpiker i don't see it

                    crazyeddie@mastodon.socialC This user is from outside of this forum
                    crazyeddie@mastodon.socialC This user is from outside of this forum
                    crazyeddie@mastodon.social
                    wrote sidst redigeret af
                    #32

                    @conchoid @Danpiker I had to work pretty hard at it.

                    I had to open the many dots image alone and zoom in. Then if I stare at a dot really hard it does appear to be ever so slightly darker a purple than the rest.

                    My eyes hurt now and everything is blurry. Don't do this at home.

                    1 Reply Last reply
                    0
                    • forteller@tutoteket.noF forteller@tutoteket.no

                      @Danpiker This is trippy as hell! I also feel like the border is more distinct when it's purple, but I can't really check because they all turn purple when I look at them! 🤯

                      forteller@tutoteket.noF This user is from outside of this forum
                      forteller@tutoteket.noF This user is from outside of this forum
                      forteller@tutoteket.no
                      wrote sidst redigeret af
                      #33

                      @Danpiker OK, so now, looking at it on my phone, they're all purple! And the one I look at is only slightly darker purple. Wild stuff. 😅

                      1 Reply Last reply
                      0
                      • wcbdata@vis.socialW wcbdata@vis.social

                        @Danpiker TIL (from someone who said "this doesn't really work") - this doesn't work if your phone has a blue-light-blocking filter on it!

                        crazyeddie@mastodon.socialC This user is from outside of this forum
                        crazyeddie@mastodon.socialC This user is from outside of this forum
                        crazyeddie@mastodon.social
                        wrote sidst redigeret af
                        #34

                        @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 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

                          mstr_milktea@blorbo.socialM This user is from outside of this forum
                          mstr_milktea@blorbo.socialM This user is from outside of this forum
                          mstr_milktea@blorbo.social
                          wrote sidst redigeret af
                          #35

                          @Danpiker

                          Didnt see it until I put my phone back a lil further from my face. 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

                            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
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