perception, motion parallax, and accommodation

One's eyes see things from two crossing angles. Even though your two eyes see two different pictures, they work together and your brain combines the two pictures into one picture with depth perception. The muscles in both eyes adjust the position of one's eyes to produce a single image of the object -- called axial convergence. Similarly, the lenses in both eyes change shape to change the focus distance of the object , which is called accommodation. This is known as parallax vision. Realistically artificially creating parallax vision in Virtual Reality is challenging. How can a person cause one's eyes to see two different pictures? How far away should the pictures be? In the event that the pictures are too distant, then the screen may be too small to span enough of the range of sight. In the event that the screen is too close, then muscles that achieve axial convergence and accommodation may fight with each other. Linked page Cosmic Origins also provides developments that may be of interest.

When simulating the sense of touch, VR platforms must simulate the tactile sensation that virtual elements would have on human movement like they were real. This resistance may be transmitted to one's senses though several mechanical pistons, inflatable air pockets, or electro-magnetic machines imbedded in glove or body tights. Simulation of touch and motion through such machines is called "haptics." While haptics applied science currently lags behind computer to human communication through vision and sounds, it will probably become more prevalent as technology progresses. Related virtual reality material at Virtual Tours White Bear Lake, Minnesota .

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