Kim ScheinbergMar 1

This is a very cool optical effect

Whichever dot you focus on looks purple while the others look blue

As someone whose eyes have been "settling" from cataract surgery followed by a superficial keratectomy in one eye, and has noticed my vision changing daily at various focal points, this is fascinating

https://arxiv.org/pdf/2509.11582v2

Show threadTrezzer (aka Helvedeshunden)
@kims All purple all the time for me. But I’m used to my eyes being weird.
Mar 1 at 10:32pmWeb
Show threadSusan VanderplasMar 4
@trezzer @kims I'm color deficient, and have the same thing. Not sure if my brain is broken or if this is a color vision thing but everything looks purple and nothing flickers like I would expect when I change which one I'm looking at.