[astrocat]

what I found fascinating is that the effect is maintained even when you're not focused (like lens focus, not attention focus) on the circles. If you let your eyes relax their focus to a point beyond the screen, the blurry circles maintain the illusion.

And bonus points if you find the focal point where a third circle is in the middle which is a composite of both the left and right circles, and... it doesn't move. I don't know how to better explain the effects of letting your eyes wander out of focus and the artifacts it creates in your vision, but I'm sure someone will get it.

[kiddico]

Took me a while to get an overlapping 3rd circle.

Feels almost normal on the left/right moving ones, but when the grow/shrink stage comes my brain has no idea what to do with the arrows. The arrows looked like they were both pointing in and out, sometimes flipping between them really fast.

Somehow the right side is slightly out of focus, but the left is sharp. I think I had each eye at a different focal point. Is that possible? lol

[shreddit]

It sure is. It’s also quite interesting that i have to get very close to the screen to create that third circle, but then can get quite far without loosing it, even when looking at the right or left circle.