Still struggling with IPD and binocular effect. Recently I remeasured my IPD and found it to be 71mm. So I set my Pimax 5K+ to the maximum 71mm. The binocular effect is quite obvious as shown in the attached pic. Then I reduced it to 60mm. The whole FOV becomes a bit smaller, but it has less binocular effect. The FOV of each eye is more concentrical and there is bigger overlapping area in the center. (see the attached pic)
Now I am completely puzzled. 71mm or 60mm, which way should I go? Which is the right adjustment? Shouldn’t a perfect IPD setting results in a perfect (minimal) binocular effect? Yet my test does not seem to conform to the assumption. Looking forward to your opinions.
Yes, pimax need to increase the IPD range and also recalibrate as it seems that the reported IPD number doesn’t correlate with what people are perceiving so something is off. There may also be some interplay with the thickness of the foam cushion and distance of lenses from eyes for a given face shape. All in all, the current design leaves a lot of people without the face shape pimax designed it for with an uncomfortable experience that they can do little about.
Several years ago I have my IPD measured at the optometrist and it’s 67mm. This time I have my IPD measured again at another optometrist and it’s 71mm. I asked my wife to measure it for me and it’s 71mm so I think 71mm should be the right value. I have a big head.
That’s really not a unique issue with Pimax… look at the Samsung Odyssey+ for example. There are so many different hacks/mods one could find on the Internet to make that unit fit differently for people. I own several HMD’s and only one them actually worked for me out of the box without the need to make some modifications… strangely enough that was the Pimax 4k.
I was using the term uncomfortable to refer to the comfort of the visuals and not the physical comfort in case that wasnt clear. OT but physically I actually find the pimax pretty comfortable. Maybe I have been lucky in that my experience with the rift previously was simply a matter of setting the ipd to 59 and after that it has been great but for my face shape the pimax falls short of delivering the visual quality that it ought to.
You say you set the IPD to 59 with your rift… is that really your IPD? I have a IPD of 60 and when I set 60 on my Pimax… the lens casing digs into my nose (and I don’t get good visual). If your IPD is that low… you find the Pimax comfortable with that IPD even though the visual is not good? I find that odd unless you have a really small nose I suppose. It digs into the ridge of my nose. I don’t think I have a big nose and no one has ever said to me… “geez you have a big nose”… I would say I have a average European nose myself.
I wish we could control the physical ipd separatist n and the digital independently @Sean.Huang@anon84525399@PimaxVR
The more we can configure these the better.
Also I don’t know why but I’m noticing that each game I need to set a different ipd value. Pavlov is 64, Bigscreen beta is 59, the forest is 62, payday 62. Really odd.
yes - i measured it and it was around 59 and that’s also where the rift is most visually comfortable. And no, I dont get any “nose squeeze” either on rift at 59 or pimax at 59.9. i dont have a small or large nose (despite what my kids claim!) so i suspect other face shape characteristics have an effect on where it sits and so each experience is different.
I think they should have shipped with 2 cushions with different thickness (like the Vive). Especially given that an additional cushion was one of the stretch goals so they will send them at some point. And especially given that the face padding is a crucial element of getting a good experience with the headset, way more important than with any previous HMD. Many people don’t even realize the problems they experience are because of the padding. Having an additional cushion would have at least helped make people aware of how important it is.
I believe the thinner padding they were using before would be perfect for me (as I saw at a demo) but now I need to experiment with DIY mods to get the same effect.
IPD at the optician measures with infinite focus, but VR headsets have a focus between 1-2 meters. In my case I have measured 65mm and have in the Pimax the best result with 64mm.
And since I have relatively deep eyes, I needed a thinner pad. This can also be cleaned better with rinsing water. Foam dissolves over time.
Shit. Mein vom Optiker gemessener IPD ist eh schon fast an der Untergrenze der Skala mit 61,5mm. Das würde erklären warum ich mich mit der Vive-IPD-Einstellung nach gemessenem Wert auch nie ganz wohl gefühlt habe… Mal sehen wie es mit der Pimax wird…
I still find people’s anxieties over ipd hilarious.
Start moving it. Ask yourself is this getting noticeably better or worse? If worse, change direction. You’ll find your spot. If not noticeable then your vision is too far gone to tell anyway, so even if you had a magic number it would not make a difference.
My current hmd says I’m on 63.8mm. Are you sure? Not 63.74mm?
Does anyone really think the measurements being told to us by our hmds are accurate? I don’t think they’re measuring the time it takes for light to travel between the centres of the lenses to give that distance.
You have your reality of what you experience and then you have your fantasy of what you’ve convinced yourself of, that some outside authority can give an answer and everything will be alright.
If more binocular overlap looks better and feels more comfortable then it looks better and feels more comfortable. And it does for me too.
I can’t agree with you on that. Subjective experience is important, but it is not enough. We still need objective fact and scientific knowledge. There are fuzzy areas that we are not sure of and have to seek help from scientific support. For me 60mm and 71mm are both acceptable and I don’t know which is right or which is better. One of the choices must have less eye strain but I am not sure which is it. In the long run it must have some impact on the health of my eyes even if I can’t fully notice it, and I am anxious about that. Of course I will not fully rely on measurement, and that’s exactly the reason I am asking help here, otherwise I will happily live with 71mm as that’s exactly my IPD measured at the optometrist. I believe in personal experience plus some guide from other people who have better knowledge, which will shed light on my confusion and make me relax.
I think people should be aware of main thing that happens when you adjust your IPD, aside from perceived sharpness and binocular overlap. I borrowed this from the internets because it explains it nicely:
“The 2 viewports (or virtual eyes) in the game should ideally match your own IPD to pass the correct perspectives and depth to your brain. By adjusting your IPD settings in the VR headset, you apply a correction to offset the rendered distance between eyes to match the IPD your brain is expecting. While the correction isn’t perfect, and results in slight perspective distortion the further you correct, VR headset IPD adjustment is good enough and it allows us to see the ~correct depth and perspective as intended.”
So the further you stray from your real IPD the more you are robbing yourself of correct depth and perspective perception that your brain expects from real life experience. Scale will be off and immersion will most likely suffer as a result.
