| JuliusHackebeil said: I din't get why you would need glasses for vr if you are nearsighted. In that case you would only need help seeing things far away sharply. But the lenses are right in front of your eyes. So how is that a problem? On the other hand I always presumed that farsighted people would have a problem since they cannot see stuff near them sharply. Svennoj, you said it is about the focal point of the lenses? |
Yes the lenses make it so the actual screens are focused at 2 meters (or maybe more) away from you. The 2 inch LCD screens appear to be huge floating screens on the other side of the room. Hence the Vergence-Accommodation conflict which is something you ahve to get used to in VR, or rather with stereoscopic projection.
It's the same as 3D cinema, screen far away need glasses if short sighted. 3D objects that appear right in front of you still have the same focal point as the screen they are projected on. So you don't need (can't) change the focus of your eyes to nearby. Basically there is no depth of field in VR, everything is always sharp at the same focal length. A finger right in front of your eyes is the same focus as the background.
Eye tracking can help identify what you are looking at and simulate depth of field that way by applying dof techniques to the image. But it can't change the focal point. There are experimental variable focus headsets, but that's future generation stuff.
https://phys.org/news/2022-09-variable-focus-thin-lens-augmented.html
Researchers have developed a thin lens with a continuously tunable focal length. The new lens could one day make visual fatigue from augmented and virtual reality (AR/VR) devices a thing of the past.
For now the focal point is fixed and set to far away.
