Had someone Eyeissues after using the Rift for 2 Hours?

[nicorose]

A Friend of mine that has his Rift a few days now told me today, that he had a massive bluried vision after unsing the Rift more than 2 Hours in a row.

Seems that his eyes took about 20 Minutes to "refocus" in the "Real World". He said he wasnt able to look clear for about 20 Minutes.

Is that True?


Even a German online PC Mag (http://www.golem.de) has written about this "issue".

http://www.golem.de/news/oculus-rift-dk2-im-test-pixeldichte-schlaegt-pentile-matrix-1408-108227-4.h...

Anyone had similar experiences so far?

[mta]

Isolated cases have to be treated as such. This is what development is all about, if nobody else reports this issue then your "friend" could well have unresolved medical issues.

If my eyes were out of focus for more than 10 minutes I would have been down to the hospital and oculus and this forum would have known about it probably from a news source.

I'm not doubting the authenticity of your "friend" but there needs to be at least a first hand account of exactly what happened.

[nicorose]

As i say. Two of the testers from the German IT News Site Golem (Link above), had the same issue after 40-50 mins in the Rift.

Thay say in in the Article.

It try to make a short Translation.....

....Our visual mechanism had to get used again to the "real" depth. Spatial vision and the ability to see fonts on screen, were momentarily disrupted. After some minutes, this problem disappeared. But we not know if its getting heavier when you stay longer in the Rift.

They say this issue appears because the eyes are tricked to the Depth that isnt there for real. And for the Eyemuscle its the same to Focus the same exact level the whole time you are in the Rift. If you come out after 1-2 Hours you eyes need Time to refocus...

Maybe not everyone is affected by this? Maybe its the same like Motionsickness?

[knack]

no, that eyes problem, you simple can't be speend much focusing so close without problems, with computer monitor its the same, but less noticiable.

You need do pauses, when you are in front of monitor too much time or in this case the rift.

For monitors i remember read something like at least 10m for each 50m/60m

You must try focusing far away in the pause and do your retina work normally. Near/Far

[mta]

It's good that you're reporting this problem but we need to see each case study so it can be evaluated

1. there are several pages on the links provided, post an excerpt that specifically refers to the problem
2. Translate it into a language the world can understand (english)

[Jedi2016]

"knack" wrote:
no, that eyes problem, you simple can't be speend much focusing so close without problems...

But you're not focusing close, that's the whole point of the lenses in the first place.

We need a lot more information from the OP instead of just "blurry vision". Is the individual near- or far-sighted already? Do they wear any kind of corrective lenses, in or out of the Rift? During the effected time, are they having problems focusing on near objects, far objects, or everything?

What I believe is happening, based on what little information I've seen, is that the eyes become relaxed inside the Rift, even when focusing on "close" objects, due to how the lenses work (it really is like using reading glasses, for those that know what that's like), that your eyes essentially "forget" to focus properly on real-world near objects. If I'm right, then the affected users would only have problems focusing on objects that are close to them, but would still have their usual long-distance vision completely intact. So... is this the case, or not?

[nicorose]

But you're not focusing close, that's the whole point of the lenses in the first place.

you do.. you focus on the screen (thats a real thing). And the lenses are fooling you to look far (Thats virtual). So you look far.. But in real you look close... Confusing..

I Ask him tomorrow.. He has nightshift ATM.

[RonScholten]

I had the same problem but after changing some things with the rift it's not happening anymore.
At first i had the screws on the first tick (as close as possible) i changed that to the 3rd from the end (so almost as far away as possible)
Then i tightend the headband (can read text much better now).

Then i played ED for over an hour and had zero visual problems after that.

[knack]

i think your pupil focus close only.... someone place a small camera in and check if there are pupil movements. :lol:

edit: change retina->pupil

[manbeard1984]

"knack" wrote:
i think your pupil focus close only.... someone place a small camera in and check if there are pupil movements. :lol:

edit: change retina->pupil

Edit: Change pupil-->lense

[Sharkku]

"nicorose" wrote:

"Jedi2016" wrote:
But you're not focusing close, that's the whole point of the lenses in the first place.

you do.. you focus on the screen (thats a real thing). And the lenses are fooling you to look far (Thats virtual). So you look far.. But in real you look close... Confusing..

I Ask him tomorrow.. He has nightshift ATM.

The phenomenon your friend has encountered is most probably the disconnect of the convergence-accommodation reflex.

As Jedi2016 correctly points out, the lenses in the Rift is bending the light so that it appears to come from infinity, in other words, rays are parallel. There is no way for the eye to distinguish between this and light that really comes from infinity, hence the lenses in the eyes accommodates to infinity. This is the most relaxed position for the lens in a normal eye.

What happens in the Rift, though, is that the binocular disparity (difference between left and right eye image), that is introduced to create depth, forces the eyes to converge on virtually close objects while maintaining accommodation on infinity. Normally an eye would also automatically reshape the lens to accommodate to the distance it's converging to. This is the accommodation-convergence reflex.

It seems that for some people who spend longer periods in the Rift, this uncoupling of the reflex lingers long after the Rift is taken off. I don't know why this is the case, I myself have never had any problems with this. Rest assured though, it's not dangerous, and similar to what happens when you view stereograms like this: http://www.3dstereograms.com/
Your convergence-accommodation reflex will return after a while.

On a side note I might mention that this effect is one of the reasons children under 7 are discouraged to use the Rift for prolonged periods. Children under this age have not yet consolidated their convergence-accommodation reflex, and the training of this reflex could be negatively impacted by too much Rift usage.