 For some users, keyboard input might be the primary method by which they control your experience, or at least supplement the use of a controller. An interesting study was done on keyboard design and gaze-based typing in VR. The focus was on being able to perform an activity like biking and still be able to type. They explored several different keyboard layouts, including a flat keyboard and a curved keyboard, as well as the size of the keyboard being larger than the field of view or within the field of view. And they looked into the keyboard following the user's gaze versus staying in place. They also looked at being able to input your selected key by either clicking or keeping your gaze on the highlighted key. What they found was that generally users preferred and had better success with a gaze-based typing method with a curved keyboard larger than the screen that followed the user's gaze, but still allowed them to select the key.