Let’s have a poll:
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Some observer sees red in front of blue, and another observer sees blue in front of red.
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So:
- I see red closer to me.56.4%
- I see blue closer to me.14.5%
- Neither (even up close?)18.2%
- Either. It moves.10.9%
55 votesFinal results
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I wonder if this has to do with the position of cones in the eye but more likely the red light is coming to a focus slight in front of the blue wavelength so the blue circle looks further away.
It would be interesting to reverse the red and blue to see if the same holds.
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Replying to
I spent like an hour going down a rabbit hole on this and I'm convinced it is due to chromatic aberration within the eye lens and that some people may not see the effect due to being far/near sighted.
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However, I made it grey scale and some people STILL reported seeing a 3D effect.
So I think this needs a 1.5 million dollar NSF research grant.