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Idman799 t1_j886ytc wrote

Reply to comment by Buggy3D in Stereoscopic motion parallax of the Moon passing between L1 and the Earth by EmergeHolographic

Can you explain this one more time? Aren't there already 4 sets of moons with two on each side? When you say "unfocus" your eyes, I assume you mean cross your eyes? And finally, when you say they converge into a single one in the middle, do you mean I'll see only one earth and one moon? I don't see how that can happen when they're not all on the same height on the screen.

Sorry to spam you with questions, but I'd love to see this work and I don't really get it from what you said here.

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Buggy3D t1_j88cldy wrote

Yeah. It was hard to explain, but the idea is to bring the picture close enough to your face that you see it in double.

You can then adjust your eyes focus and the distance from your face so as to form a central optical illusion.

Similar to when you raise one horizontal finger in front of each eye. If you bring both fingers close to each eye. You can form an optical illusion whereby the tips of each finger appear like they have merged on opposite ends of each other.

Doing the same here with the picture can let you see a 3D optical illusion of the Earth and moon, albeit unfocused.

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TarryBuckwell t1_j89ak7x wrote

Another way to think about “unfocusing your eyes” is refocus your vision on an imaginary object that is slightly beyond the image (in this case behind your phone). This is why people say to move the image slowly away from you while relaxing your eyes but it’s unnecessary- all you are actually doing is widening your pupillary distance to achieve the optical illusion, which is what naturally happens when you focus on things at longer distances.

Look at your phone, then look at something past it and you’ll see your phone doubles in your vision. Just do that to the picture until you see a third vertical set of photos. The effect is not very 3D in this case as it would be with a magic eye but it’s slightly more dynamic than just looking at the screen.

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