Danpiker16h ago

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

Show threaditgrrl 

@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 💁‍♀️

1:57pmWeb
Show threadTrueNorthSpice 🇨🇦12h ago

@itgrrl @Danpiker

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

Show threadSolitha12h ago
@TrueNorthSpice @itgrrl It can be about your electronics, too. I can see the effect on my new monitor, but not on my old one.
Show threadTrueNorthSpice 🇨🇦11h ago

@solitha @itgrrl

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