The mice quickly learned to navigate their virtual environment by running on a spherical treadmill. And those visuals appeared to be more immersive than ever – seen through MouseGoggles, the mice reacted to reward and fear stimuli far more strongly than when viewing virtual worlds on big 360-degree projector screens.
Source: https://www.sciencealert.com/scientists-have-created-vr-goggles-for-mice-and-theyre-adorable