[soxocx]

Thats interesting. I see it with either or both eyes.

[jareklupinski]

I... only see it happening with either both eyes or my right eye...

My left eye is immune? This is uncanny...

[meitham]

I’m the opposite! My right eye alone can’t see it, but can do with both or left only!

[yazzku]

Sounds like your perception can't exactly be pigeonholed.

Boom, baby.

[867-5309]

your taxi to the nearest wormhole awaits..

[bmitc]

The illusion is much less if I zoom in and even less if I close one eye, so maybe they had their device up close to their face?

[soxocx]

You are right. If I tilt the screen while changing distance to the screen and keep blinking with my eyes while I do this, I, besides looking like a maniac, can weaken the effect and even make it disappear entirely.

[PyWoody]

Try closing one eye and tilting your head 90°

[kerpotgh]

I can see it irrespective of how many eyes are open or any tilt angle.

[javawizard]

So you can see it with zero eyes open? ;)

I also see it with any number (>= 1) of eyes open and at any angle. Wonder if GP's phone was on night shift or something similar - the article mentions that color changes impact the illusion's visibility.

[d4mi3n]

No night shift, for what it’s worth. Another commenter mentioned astigmatism, which I do have. I was not wearing my glasses at the time.

Curious to see if anybody with expertise on the topic of optics or visual perception chimes in with some insight.

[kerpotgh]

Interesting, I have astigmatism so I tried it without my glasses and with both one and two eyes open at different angles and I still see the illusion (with no change in intensity of the “bobbing”)

[yazzku]

Can you see it with three eyes opened?

[labster]

I can’t but I’ll ask my yoga guru tomorrow.