Using Convergence Angle to Select Among Different UI Elements

A wearable computing system may include a head-mounted display (HMD). The HMD could be configured to present a field of view that could include views of the real world environment as well as displayed images. As the viewer attempts to see objects at different real or apparent depths within the field of view, the brain may generally coordinate the eyes to jointly change a vergence angle. If the depth is known (because it may be generated by a user interface (UI)) and the user is wearing an eye-tracking system, it is possible to determine at which of the objects the user intends to look. This may allow the interface to place UI elements in locations that are perceived to be very close, or even overlapping, while the wearer may able to discriminate the object of interest, which is generally not possible with non-stereoscopic displays.