Question about Lens Adjustability

[Codger]

I'm interested in VR. But I have some visual problems, and I'm not sure if they will affect things.

Although my vision is clear and sharp for close things (across the room is still OK), farther away I tend to see double thanks to some weak muscles in my eyes. I wear glasses, too, and I'm nearsighted.

In RL I can compensate pretty well, but the doubling is always present on far away stuff.

How flexible are the lens adjustments in a Vive or Rift?
Can you adjust the lenses to align the images left-to-right at all?
How far away is your actual focus?

Any info would be appreciated.

 

[Ulysses_W]

The only adjustment on the rift is IPD, or distance between pupils. You cannot alter the distance from lens to eye. I cannot speak for the Vive though

o7

 

[Orvidius]

Unfortunately it does not allow you to alter the image centering, left to right, for each eye. The IPD (inter-pupillary distance) is adjustable, but you can't tweak the image centering in relation to that.

I had a separate thread asking about that, since my glasses and/or distance of the headset from the eye was impacting my depth perception, making everything outside the cockpit appear to be projected onto a 20-foot radius screen. I opened a ticket with Oculus, and they basically just came to the conclusion that everything was working, and there was nothing they could do for me.

I've since gotten things working well enough for me, using third party add-ons, such as prescription lenses from VR Lens Lab, and velour pads from VR Cover. The pads push the HMD further from the eyes than the stock foam pads do, and they also offer a larger adapter as well.

But it sounds to me like your problem may be opposite mine. I wanted to shift the images outward from center, to make them look further away. But you'll probably need them moved inward, since close-range eye convergence works OK for you?

 

[Para Handy]

I hope a more experienced user will come in with definite data but in the meantime...

I have good distance vision, images sharp at tv watching distance and beyond but need glasses for reading and PC monitor. Using the rift I have no need for glasses so the apparent / effective focal distance (?) must be distant, if not infinity.

I don't know how it works (I suppose parallax) but if I hold an object in VR at a distance I would normally need eyeglasses to focus clearly on - it is clear without needing glasses.

As I said, I hope one of the knowledgeable will pop up with a proper explanation.

 

[Orvidius]

I don't know how it works (I suppose parallax) but if I hold an object in VR at a distance I would normally need eyeglasses to focus clearly on - it is clear without needing glasses.

That's not parallax, but rather focal depth. The lenses are focused to (or near to) infinity.

However, the position within your field of view, left to right, is different for each eye, based on its position in space. This is called Stereopsis, and it is how your brain interprets depth in space, for normal depth perception. OP's problem is that his eyes don't converge properly on distant objects, or rather, his eyes don't want to widen to parallel viewing angles. They converge for near viewing pretty well. Since this is a stereopsis issue, it won't be affected by the lens focal distance.

 

[Para Handy]

................

However, the position within your field of view, left to right, is different for each eye, based on its position in space. This is called Stereopsis, and it is how your brain interprets depth in space, for normal depth perception. ..............

Ah right, that is what I was incorrectly calling parallax, thanks for that correction / clarification and the other excellent info.

 

[dogbite]

Unfortunately it does not allow you to alter the image centering, left to right, for each eye. The IPD (inter-pupillary distance) is adjustable, but you can't tweak the image centering in relation to that.

I had a separate thread asking about that, since my glasses and/or distance of the headset from the eye was impacting my depth perception, making everything outside the cockpit appear to be projected onto a 20-foot radius screen. I opened a ticket with Oculus, and they basically just came to the conclusion that everything was working, and there was nothing they could do for me.

I've since gotten things working well enough for me, using third party add-ons, such as prescription lenses from VR Lens Lab, and velour pads from VR Cover. The pads push the HMD further from the eyes than the stock foam pads do, and they also offer a larger adapter as well.

But it sounds to me like your problem may be opposite mine. I wanted to shift the images outward from center, to make them look further away. But you'll probably need them moved inward, since close-range eye convergence works OK for you?

One thing is certain. You will need to wear prescription lenses for distance in VR. Whether your somewhat unique visual issues would be any more or less evident is the question. It would seem prudent to demo the tech, before jumping on board, to be sure.

 

[BigDuke6ixx]

One thing is certain. You will need to wear prescription lenses for distance in VR. Whether your somewhat unique visual issues would be any more or less evident is the question. It would seem prudent to demo the tech, before jumping on board, to be sure.

Can he get prescription lenses fitted to his HMD?

 

[Codger]

Thanks for all the great info. Maybe I can find a way to try before buying

 

[mahoon]

You can get prescription inserts - vr lens lab and widmovr are the two makers that I know of.

 

[PIXEL]

Got mine from here:
https://vr-lens-lab.com/
Quite expensive but do the job perfectly and have saved me a fortune in paracetamol to cure the headaches i was getting using the rift. I only needed a small correction in one eye for distance, so i only use one of the inserts.

Go to an optician - not a supermarket, explain why you need the test (for VR) and get a properly done prescription then send off results for inserts - you won't regret it (-:

 

[TorTorden_VR]

I think/fantasy that down line. Like a few generation from now. The lenses could be motorised independently and the system can use the eye tracking cameras (that will be there) to find a perfect fit automatically.

Well I can hope.

 

[A D]

Sorry, don't want to hijack this thread but I'm short sighted so also interested in the experiences of Rift users who have eye issues.

I'm short sighted (Myopia) - objects in the distance are blurry and objects close up are clear. This is corrected with contact lenses, but then distance is clear and close up slightly blurry (i.e. the reverse). With HDK2 I can use VR with OR without contact lenses because it allows me to adjust the focal distance of the lenses (i.e. distance from the eye).

So as regards any short sighted Rift users, my questions are:

1. Does Rift allow the focal distance of the HMD lenses to be adjusted?

2. Does Rift allow "eye prescription" to be entered in the software (HDK2 has this feature, but have not used it) and does it work?

3. Is VR really a close image (just gives the illusion of distance), so for someone short sighted the image is clearer without contact lenses or glasses?

4. In any case, if you are wearing contact lenses or glasses that correct short sightedness and using Rift, is the image clear (i.e. much the same for someone with normal vision)?

You will need to be a short sighted Rift user to answer these questions [big grin]

Thanks 07

 

[TorTorden_VR]

Sorry, don't want to hijack this thread but I'm short sighted so also interested in the experiences of Rift users who have eye issues.

I'm short sighted (Myopia) - objects in the distance are blurry and objects close up are clear. This is corrected with contact lenses, but then distance is clear and close up slightly blurry (i.e. the reverse). With HDK2 I can use VR with OR without contact lenses because it allows me to adjust the focal distance of the lenses (i.e. distance from the eye).

So as regards any short sighted Rift users, my questions are:

1. Does Rift allow the focal distance of the HMD lenses to be adjusted?

2. Does Rift allow "eye prescription" to be entered in the software (HDK2 has this feature, but have not used it) and does it work?

3. Is VR really a close image (just gives the illusion of distance), so for someone short sighted the image is clearer without contact lenses or glasses?

4. In any case, if you are wearing contact lenses or glasses that correct short sightedness and using Rift, is the image clear (i.e. much the same for someone with normal vision)?

You will need to be a short sighted Rift user to answer these questions [big grin]

Thanks 07

I'm fully myopic, -4.5.
This goes for both the rift and the vive btw.
1:
No.
2.
No.
3.
No.
4.
There is no close focus, the lenses make the entire display focus the light as several meters away, prescription contacts or glasses is what is needed.
Without my glasses I couldn't even read the name of the station on the startport menu.
But with my glasses its perfectly clear, I could distinguish individual pixels with ease if I so would.

Since I'm not happy with how contacts worked for me, my left eye has a slight astigmatism so last batch of contacts didn't really focus well enough close and things "got weird".
In VR however that was not an issue at all, it's all hyperopic in VR for now.

Since I fell down this road that is VR I just use my regular glasses instead of paying for contacts, hey when you NEED a 1080ti you need a 1080ti...
They work fine no problems and I can spend hours and hours in the rift.
Think 11+ hours, with maybe two short breaks on several occasions.

Mileage will vary with what type of frames you have, but if their are somewhat minimalistic, and not fat rimmed hipster goggles you should be fine.
Here's a pic I took of my rift and how my specs fit inside them.

Spoiler

I probably push them a little closer, but there is plenty of room, and I have never been near scratching the rift lenses.

 

[A D]

Thanks heaps for the info' TorTorden + 1

Looking at the Rift as a replacement for the HDK2. Surprised the HDK2 is ahead of Rift on this front, but wear contacts all the time so shouldn't be an issue.

 

[Wrongway]

Just a word of warning. I have had two rifts, well 3 if you count the DK2. Fortunately my first CV1 developed a fault and had to be returned for replacement. I say fortunately because the lenses had become scratched due to wearing glasses whilst using the rift. These are not large glasses but still managed to make contact with the lenses in the rift. Also the sides of the frames were very uncomfortable. I ordered a set of VR Lenslabs lenses for my myopic eyesight (-1.75 and -2.0) and they have been fantastic. Only problem was they sometimes moved or fell out. This has been improved in the latest batches by adding a flexible piece to the top of the frames. They sent me two of these pieces to retrofit onto my original lenses I bought. I have ordered some 3D printed frames from eBay that use the VR Labs lenses but put them in a more fixed position. http://www.ebay.com/itm/Oculus-Rift...hash=item2127386e38:m:mWN82wdrhU_XLoUY24hULHQ

You need to specify your PD (pupillary distance) to match your setting in the Rift which goes from 58mm to 71mm. Thats another problem I have. My PD distance is 74mm but the Rift seems to perform well enough at it's widest setting.

 

[Orvidius]

You need to specify your PD (pupillary distance) to match your setting in the Rift which goes from 58mm to 71mm. Thats another problem I have. My PD distance is 74mm but the Rift seems to perform well enough at it's widest setting.

Thankfully the CV1 seems to be pretty forgiving of slightly incorrect IPD. I had mine set to around 60-62mm for a while, not realizing that my actual PD is around 58-59mm. I thought everything looked fine. I got my measurement when I updated my prescription, to send to VR Lens Lab, and so now I set the HMD to the minimum. Everything still looks fine.

 

[mahoon]

Just got my prescription lenses from WIDMOvr - after a run-around from Royal Mail mistakenly redirecting them to a different company in a different city and having to retrieve them and then get them sent to me - and I can't praise them enough. Those who don't need to wear glasses in their Rift don't realise what a blessing it is to just pop the headset on (back -first) without a second thought. Thankfully I now know that blessing too. The lenses are excellent and the adapter is easy to insert. Plenty of clearance between rift and insert lenses too and because the adapter fixes between faceplate and headset there's no movement. I recommend giving them a look if you're looking to for an alternative to the struggle of wearing glasses in your headset (you'll be reducing the chances of unwanted lens scratches too). Advert ends.