8KX review - good, but with a major IPD problem for me

Ah sorry to hear that, glad you’re enjoying the Reverb. Fortunately the one thing for me is that I’m not getting eye strain, it’s close enough that it’s just a bit of clarity loss.

However I am now using a different depth offset, -0.5 compared to -1.5 on the 5k+. This can really be headache inducing when set wrong.

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I have a IPD of 60 and have the identical issue with the 8KX - quite frustrating…

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To make things clear once again, like Risa2000 demonstrated several times, lense center to lense center distance is not IPD.
it is supposed to be superior to IPD, so if we set our IPD correctly, (relatively to what our measured far sight IPD really is) we are not supposed to have both eyes on the sweet spot at the same time on pimax headsets (which panels are the most canted on the market).
But this takes some time for our brain/eyes to get used to.
basically, having one eye at a time on the sweet spot is enough for the brain to build a overall clear 3D image.
if you try to match both of your eyes to both lenses centers at the same time, you’ll have a smaller set IPD than your real far IPD and will have a wrong world scale, even if you don’t necessary realise that.
And the clear zone will be restricted to the very center of your FOV.
instead, with the IPD set correctly, after some time, you finish with a larger clear zone, but like I said, it can take some time to get used to.
Also, the thickness of the foam plays a roll. the further your eyes are from the lenses, the more IPD you have to set to get the same effect.
I have no idea if the X has a different center to center configuration though

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Whats your IPD? This sounds exactly like my experience usimg Rift S as my IPD is 70mm

Funny I always need to max it out.

Maybe not since if they are new to VR they will likely barf.:face_vomiting:

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Isn’t that expected then…? :grin:

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I think they compensate this issue by setting SW IPD. So if you set HW IPD too low (to get sharp on both eyes) you increase SW IPD (horizontal offset) accrodingly.

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About 62mm, maybe a bit less. The main thing is that it was just about OK on the 5k+ but no matter how many times I’ve tried to readjust, I can’t get both eyes crystal clear. I’ll swap the cowling from the 5k+ at some point to test that.

Maybe not since if they are new to VR they will likely barf.:face_vomiting:

Agreed that is true, especially if someone suffers from vertigo :smile: Low level flying first, not dropping off the edge of a skyscraper platform!

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Understood, but you may be missing a fundamental point that a few 8KX users are suffering from this, but probably not most.

It’s not just about being in the centre of the sweet spot, or even near to it - it’s about what happens when you’re looking through part of the lens that actually starts to curve and distort the image, because our IPD is too narrow specifically for the X. We shouldn’t be looking through that part, but we don’t have a choice.

  1. Perfect clarity with both eyes is simply impossible. It doesn’t get better as the brain / eyes adjust - there is a physical issue with looking through a curved part of the lens that introduces a little blur / distortion. I can only ever get that perfect clarity with one eye closed, and not looking straight ahead - this allows me to not look through the curved edge of the sweet spot.

  2. This issue only occurs with the X, and not the 5k+. It is something about the the X, additional width perhaps, that is restricting IPD further than before. Therefore those of us who did not have a problem before, do now. The margins are small, so it does not make it unusable for me. It’s just a shame that I can’t enjoy the full clarity that the unit is capable of.

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This unfortunately is a problem with HMD 's today even oculus refuses to allow adjustment to every eyeball.

Its a shame but I’m not sure what outcome you are expecting.

Again, it sucks but not sure what they can do now…

Not expecting anything tbh, it’s still a mighty fine headset but it is a shame that this issue exists, I didn’t expect this problem.

I still have some small hope that it could be fixed somehow, but I only have a couple of things left to try myself. For what it’s worth, I raised a ticket with Pimax today in case they have any suggestions.

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Their suggestion might be get a G2 :slight_smile:

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you always can do extreme Pimax mod :sweat_smile:

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I am maybe wondering if one needs to more center the Dominant Eye?

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Yes Palmer was not impressed with the release of the Rift S as he has a larger ipd and it more or less pushes him out of the platform he Founded.

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Im just happy that the 68mm setting exists as its much better with my 70mm ipd.

pretty much a non issue. paired with the 12mm soft fabric vrcover i originally bought for my Rift.

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It’s certainly true that when I first got the unit I found my non-dominant left eye was more likely to be closer to the centre. But I still found blur straight ahead in both eyes.

But it’s almost a non-issue now since I swapped gaskets, as I get both eyes clear consistently every time. I still have very slight blur dead ahead but it’s so small now compared to before, it’s not worth worrying about at all.

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It was also yourself who suggested I try it, so thank you again. It was a pain to detach from the old unit but I glad I persevered, because it worked and nothing else did.

You made my X viable, so I am very grateful. Distance means I can’t buy you beers unfortunately but please have some, or your drink of preference, on me hehe! Cheers! :beer: :beer: :beer: :beers: :beers: :beers: :+1: :+1: :+1: :sunglasses:

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Thanks; However I believe the credit belongs to @john2910 whom first tried this on the Artisan when the Comfort kit caused him to have issues.

:beers::wink::vulcan_salute::sparkles:

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