VR has been in people's sight for a few years now, but until today, the development of VR is still very slow, and even said that it is still in a very junior state. In our impression, especially in the era of explosive development of this technology product, no product has developed so slowly. So what is the cause of VR development so slow?
The biggest problem facing VR now is not its high price, more stringent hardware requirements and the same harsh environment, but the vertigo that VR brings to the human body. This vertigo is not a special case for individual users, but the normal physiological response of human beings to virtual reality brought about by VR technology. Before solving this problem, VR could not be developed rapidly.
So why do humans have a sense of vertigo on VR? In fact, the principle is very simple, nothing more than because the picture brought by VR can not really deceive our brain, which leads to discomfort, and the main reasons why VR causes us discomfort can be divided into four categories:
Vestibular system
Under normal circumstances, humans work together through vision, vestibular system and muscles, and through the nerves to convey information, tell the brain the state and position of our body. But in the virtual world brought by VR devices, only humans can perceive visual movement. The vestibular system and muscles do not move because the body actually does not convey the information that is contrary to the visual system. The human brain cannot handle the phase. Two kinds of information of conflict, which leads to physiological reactions of dizziness and nausea.
We manipulate the VR device to walk in the vision, the vision tells us that our body is moving, and the vestibular system that senses the dynamics of the body clearly senses that the body does not move, and our body will feel nausea and dizziness. And this feeling will last for a long time.
2. Delay problem
VR devices have a certain delay in sensing human motion. The pictures we see in VR devices are not synchronized with the body movements. It may be that the gap is very small, but it will still make our brains react to judgment errors. , which causes human discomfort.
For example, when we don't have VR devices, when we turn around, there is no delay between the perception of vision and body movements. When we wear VR glasses, when we turn our heads, VR devices need some time to judge us. The action of using this phenomenon in a short period of time may not cause obvious discomfort, but when we use the VR device for a long time, the discomfort caused by this phenomenon will rise rapidly, and we take off the VR device. After that, it lasts for a long time.
3. Scene and mobile issues
The range of visual scenes brought by VR devices is greater than the normal visual range of humans. In order to give us a better immersive experience, VR equipment will provide a larger visual range than our normal visual range. At the same time, VR equipment presents an environment that we are not familiar with. Human instinct will frequently move the eyeball and rotate. Head to observe and perceive this environment.
But this action is different from our actions in the normal world. In our normal world, the environment does not move with the movement of the head. When we tilt the head, our vision can tell our brain. It is a real world; the vision in the VR device will rotate with the rotation of our head, and even when our head is tilted, the picture will be tilted, which will significantly increase the discomfort of the human body.
4. Visual convergence
The physical depth of field of VR equipment is not uniform with human vision. When humans observe near objects, they need the ciliary muscles to drive the lens to focus. When the focus point is close, the pupil distance will be relatively close. When the focus point is far away, the pupil will be relatively outward. This phenomenon is called visual convergence.
The light emitted by the screen in the VR device is flat and does not have depth information. The current VR device cannot temporarily form a physical depth of field, and the depth of field can only be deliberately created by blurring or clearing the picture. When humans observe different depth of field pictures, because they cannot perceive the distance information, they can only position the visual focus on the screen, which conflicts with the displayed depth of field. Human beings in this environment for a long time will have a more serious stun, and this problem cannot be solved by current technology.
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