4 ms·

To reduce eye strain, don’t cross your eyes, but relax them (so, the other way). Instantly clear and snaps together as if magnetic.

tartoran 2y ago
The problem I have with this is that instead of the images completely overlapping they overlap a section in the middle. I can't get both images to completely overlap and am getting some eye strain from trying to force them.
claiir 2y ago
This is called “divergence” [1] and is less straining on your eyes than crossing them (“convergence” [2]) while being equally as effective spotting differences, even on video. It’s also what your eyes naturally do when you watch stereoscopic 3D with tinted glasses—the stereoscopic images are pulled out (divergence) not pushed in (convergence/cross-eyed). I’ve been doing this since I childhood. If you get good at it, you can watch side-by-side 3D videos in 3D with just your naked eye (e.g. VR). I believe there’s a reddit covering the more prurient variety of that! [1] https://en.wikipedia.org/wiki/Vergence#Divergence https://en.wikipedia.org/wiki/Vergence#Divergence [2] https://en.wikipedia.org/wiki/Vergence#Convergence https://en.wikipedia.org/wiki/Vergence#Convergence
- stavros 2y ago
  The only problem with divergence is that you can't go too much farther out than the distance between your eyes, whereas convergence works for larger images as well.
- joshuaissac 2y ago
  Convergence highlighted the differences for me in all four images. Divergence only worked for me in the cat bear image. For the others, I could see a combined image but I could not see any differences highlighted, even though I knew what to look for.
prmph 2y ago
A simple trick to doing this, in case it's not clear how to do it, is to try focusing on an imaginary point behind the screen as you look at the images. You will see a third image between the two start to come into focus. Now relax your eyes and look at that image. Simple, and quite a bit more relaxing than crossing your eyes. The only disadvantage to this method is that it seems there is a limit to how wide the middle image can be, i.e., the original images may not completely overlap. If you do want to cross your eyes but do not know how to do it, do the opposite of the above: try to focus on an imaginary point closer to you than the screen as you look at the images. This method is far more taxing on the eyes though.
- mewpmewp2 2y ago
  I was still unable to do this, not sure what I am doing wrong, but I can't get over the sense that I am always directing only one of my eyes. I can't move them independently.
  - batch12 2y ago
    In this case, you aren't directing your eyes, but instead looking through the object. Start with your finger about 6-8 inches from your face, and look at your screen. You'll see two fingers. Now try to look past your screen. The farther you are from the object the harder it is.
    - mewpmewp2 2y ago
      > You'll see two fingers I don't follow this part, still. Do you mean computer screen / phone screen behind my finger which I would try to look at? I can switch between my left and right eye when I concentrate, but I can't see both at once. I can try to rapidly switch from left to right to back, but it takes a lot of effort, and it's never the same image at once? My right eye is dominant, I can switch to left eye if I focus hard, but I can't merge both or can I? Edit: I tried putting a paper between my eyes, so right eye would only see right part and left eye only left, am I supposed to see the whole image at once then combining the inputs from both eyes at the same time? Because I can only see left or right, as if my other eye was closed, even though it's not. I'm wondering if something is wrong with me.
gnclmorais 2y ago
By ready your comment, I just realised that this is what I’m doing instinctively, instead of crossing my eyes :o

tartoran 2y ago

The problem I have with this is that instead of the images completely overlapping they overlap a section in the middle. I can't get both images to completely overlap and am getting some eye strain from trying to force them.

claiir 2y ago

This is called “divergence” [1] and is less straining on your eyes than crossing them (“convergence” [2]) while being equally as effective spotting differences, even on video. It’s also what your eyes naturally do when you watch stereoscopic 3D with tinted glasses—the stereoscopic images are pulled out (divergence) not pushed in (convergence/cross-eyed). I’ve been doing this since I childhood. If you get good at it, you can watch side-by-side 3D videos in 3D with just your naked eye (e.g. VR). I believe there’s a reddit covering the more prurient variety of that! [1] https://en.wikipedia.org/wiki/Vergence#Divergence https://en.wikipedia.org/wiki/Vergence#Divergence [2] https://en.wikipedia.org/wiki/Vergence#Convergence https://en.wikipedia.org/wiki/Vergence#Convergence

stavros 2y ago
The only problem with divergence is that you can't go too much farther out than the distance between your eyes, whereas convergence works for larger images as well.
joshuaissac 2y ago
Convergence highlighted the differences for me in all four images. Divergence only worked for me in the cat bear image. For the others, I could see a combined image but I could not see any differences highlighted, even though I knew what to look for.

prmph 2y ago

A simple trick to doing this, in case it's not clear how to do it, is to try focusing on an imaginary point behind the screen as you look at the images. You will see a third image between the two start to come into focus. Now relax your eyes and look at that image. Simple, and quite a bit more relaxing than crossing your eyes. The only disadvantage to this method is that it seems there is a limit to how wide the middle image can be, i.e., the original images may not completely overlap. If you do want to cross your eyes but do not know how to do it, do the opposite of the above: try to focus on an imaginary point closer to you than the screen as you look at the images. This method is far more taxing on the eyes though.

mewpmewp2 2y ago
I was still unable to do this, not sure what I am doing wrong, but I can't get over the sense that I am always directing only one of my eyes. I can't move them independently.
- batch12 2y ago
  In this case, you aren't directing your eyes, but instead looking through the object. Start with your finger about 6-8 inches from your face, and look at your screen. You'll see two fingers. Now try to look past your screen. The farther you are from the object the harder it is.
  - mewpmewp2 2y ago
    > You'll see two fingers I don't follow this part, still. Do you mean computer screen / phone screen behind my finger which I would try to look at? I can switch between my left and right eye when I concentrate, but I can't see both at once. I can try to rapidly switch from left to right to back, but it takes a lot of effort, and it's never the same image at once? My right eye is dominant, I can switch to left eye if I focus hard, but I can't merge both or can I? Edit: I tried putting a paper between my eyes, so right eye would only see right part and left eye only left, am I supposed to see the whole image at once then combining the inputs from both eyes at the same time? Because I can only see left or right, as if my other eye was closed, even though it's not. I'm wondering if something is wrong with me.

gnclmorais 2y ago

By ready your comment, I just realised that this is what I’m doing instinctively, instead of crossing my eyes :o