Cross-Eye Optical Illusions

The cluster focuses on discussions of optical illusions involving cross-eyed viewing for 3D depth perception, including critiques of perspective distortion, parallax effects, lens issues, and projection accuracy in images or displays.

➡️ Stable 0.6x Science
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20
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5
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#3097
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Keywords

www.cs huji.ac UTF GoPro duckduckgo.com youtube.com FOV google.com TV camera perspective 3d image illusion projection optical view eyes mirror

Sample Comments

palunon Nov 26, 2016 View on HN

Or just some ability to cross your eyes ;) (if the image is not deformed for lenses)

W3zzy Dec 20, 2025 View on HN

It's the lens distorting the view.

yakubin May 28, 2023 View on HN

Digital zoom doesn’t fix the distorted perspective.

tinmith Jun 14, 2017 View on HN

Actually the projection is correct, but the camera is not exactly at the center of projection, so it appears that the lines are bent across the monitor edges. However, if you place your head at the exact center of projection, they look correct. I'm actually doing three separate projections, instead of just stretching one image across three displays. The GoPro field of view was not able to capture everything, so I had to pull it back a bit, and so its not perfect. A spherical camera would ha

coherentpony Nov 23, 2013 View on HN

Hmmm. Isn't this just parallax?

konz May 5, 2015 View on HN

The fact that the perspective is slightly off bugs me more than it probably should.

rasz_pl Jul 2, 2015 View on HN

depth/focus is wrong and hurts my eyes, its like those pictures are forcing me to go cross-eye

recursive Nov 17, 2025 View on HN

That seems like it's just normal perspective from the opposite direction.

boffinism Mar 4, 2023 View on HN

No because:> for the optical illusion to work, you must place the virtual camera at the position of one of your eyes and close the other one.

this is dead old problem that doesn't work in bad light / perspective conditions