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I was in bed reading this with an eye closed and was very confused until I discovered the illusion works for me only when I watch it with both eyes open. I fou
by d4mi3n 4y ago
I was in bed reading this with an eye closed and was very confused until I discovered the illusion works for me only when I watch it with both eyes open.
I found this surprising—I know three dimensional optical illusions depend on focus and perspective, but I was unaware two dimensional optical illusions were as well.
- soxocx 4y agoThats interesting. I see it with either or both eyes.
- PyWoody 4y agoTry closing one eye and tilting your head 90°
- kerpotgh 4y agoI can see it irrespective of how many eyes are open or any tilt angle.
- javawizard 4y agoSo 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 4y agoNo 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 4y agoInteresting, 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 4y agoCan you see it with three eyes opened?
- labster 4y agoI can’t but I’ll ask my yoga guru tomorrow.
- jareklupinski 4y agoI... only see it happening with either both eyes or my right eye... My left eye is immune? This is uncanny...
- bmitc 4y agoThe 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 4y agoYou 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.
- stouset 4y agoI let out a verbal "what the fuck" when I tried this. Same exact thing as you, it's absolutely striking.
- d4mi3n 4y agoI was confused as well. First impression: nothing. Get up and look with both eyes and there it was. Interesting stuff.
- kolinko 4y agoFor me, if I focus intensely on the head, the neck stops moving. When I relax, and the reference naturally changes to the lines in the background, the neck begins moving again.
- aendruk 4y agoAstigmatism? My eyes blur at different angles so various anisotropies show up only when one is closed.
- d4mi3n 4y agoI do have an astigmatism in my right eye—which was also closed. First time I’ve had this happen with an optical illusion, though.
- Daub 4y agoAs a one-eyes person, the illusion works fine for me. However, it ceases to work in the periphery of my vision.
- stefncb 4y agoFor me it weakens with one eye closed, but I still see it.
- IshKebab 4y agoWorked a bit better for me with one eye closed. Weird.