Stare at the 2 images below until your eyes cross and you see 3 images. The middle one will be in 3D!
What’s happening is your left and right eyes are focusing on the left and right images respectively, which is how the brain perceives depth.
All I did was take two pictures, keeping the lamp post in the same spot. Your brain does the rest of the work putting the two together.
Bonus: Our ears work pretty much the same way. We can tell the position of a sound with our eyes closed. Our bodies interfere with the sounds we hear which our brains use to figure out where its coming from. Listen to this (binaural) audio clip with headphones (it won’t work otherwise) and you’ll hear what I mean.
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