What-is-binocular-overlap-and-why-should-you-care?

General discussion
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"Binocular overlap refers to the visible overlapping portion between the two eyes of a stereoscopic vision system. In other words, it describes how much of the viewed scene can be seen by both eyes as opposed to by just one of the eyes.

Binocular overlap.
Source: David Johnson, University of Utah

The visual field varies from person to person, but typically extends 60 inward (toward the nose) and 100 degrees outwards, and typically 60 degrees above and 75 below the horizontal meridian. As such, the binocular overlap region is 120 degrees horizontally (-60 to +60 degrees for each eye). Since each eye can see about 160 degrees, the binocular overlap is 120/160 = 75%."
http://sensics.com/what-is-binocular-overlap-and-why-should-you-care/#:~:text=Binocular%20overlap%20refers,120/160%20%3D%2075%25.

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Apparently not enough to participate lol. But I do, better overlap makes the image look more three dimensional and “real” for me. When I first realized just how important it is was when I went to from the OG Vive to the 8KX. I could’nt understand why some games I played looked more “real” in the Vive. I thought it was the oled panels in the Vive, which I still believe that plays a part. It wasnt until years later I learned about binocular overlap. So I put 2 and 2 together. The 8KX comes in around 83%, the Vive 93%. Going back over the chart below I can see Bin overlay just doesnt seem to be that important to HMD manufacturers. Most are under 90%. HMD Geometry Database | Collected geometry data from some commercially available VR headsets.

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The 8kX though has much lower Stereo Overlap than ty OG Vive and other small FoV headsets. Any headset less than or equal to having a HFoV of 120 is only within a HFoV where 100% binocular overlap is possible.

This video s why Binocular Overlap % can be misleading to some degree. The % only applies to a max of 120° overlap.

The 8kX has similar overlap to BsB but the BsB will feel better due to the much smaller HFoV. The 8kX if possible would have needed a Stereo Overlap estimated to 100° to feel maybe similar. However the extra 40° peripheral pov may also affect the 3d feel. Of course there is also the canting issues for eyes

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According to Martin, the 8KX overlap is between 52 and 65%, but I guess it depends on the exact criteria. I’m still using one, and it’s not as comfortable as a Q3 or QPro on my eyes. Looking forward to seeing how the Dream Air feels.

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The actual overlap on the 8kX is around 71% (76°÷120). 53% is the Total HFoV (76°÷160).

Binocular Overlap for human vision is around 120°. The other 20° Left and zright is peripheral view and is not seen by both eyes.

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Interesting, I always thought human vision stereo overlap would just be a baseline of 100%.

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I have an issue similar to low overlap, but it is connected to quadviews; in QW my high supersampling boxes are not aligned. Those boxes are separated a bit, and it feels like “too small binocular overlap”.
Anybody else has that issue?
I know this is different topic, but for me it is similar in a weird way.
(see details here )

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Interesting this sounds like it is not rendering the views in proper alignment.

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Definitely not, at least for me. I do have big ipd, but I can calibrate fine, just boxes are not aligned.
Temporary I set boxes very wide (vertically small, horizontally wide).
PS: I do think that QV boxes for all people should cover more space to the inner side (to the nose). That alone can reduce eye strain and allow people to play for longer.
Then we could use much smaller QV boxes without any issues.

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