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

@kims
Usually these images with black and white dots and the likes work for me.

This one doesn't, I don't see the blue dots this time.