How to make virtual reality less nauseous
Researchers at Stanford University developed a prototype for a light field stereoscope in an effort to improve virtual-reality focus cues. The images used are standard images with varying degrees of focus in order to imitate natural vision. In real life, when you look at something, your eyes move and the lens in each eye adjusts to bring whatever is in front of you into focus. The idea behind this prototype is to bring two LCD fields into a stack which then is transmitted to each retina providing the illusion of depth and an allowance for the eyes to freely move around and focus on whatever they want in virtual space. Current stereoscopic vision technology in virtual reality uses a slightly different images for each eye to provide a sense of three dimensional depth. Since the projections are displayed on a two dimensional screen that appear to be in front of you, it can result in nausea and dizziness also known as a vergence-accommodation conflict.
For more information about this research, check out this article from the MIT Technology Review.