Measuring Eye Gaze Convergent Distance within Immersive Virtual Environments

Within applications conducted in immersive virtual environments such as CAVE, eye gaze convergent distance (also called focal distance) is an important parameter used in several fields such as telepresence, virtual scenes depth perception, HRI, and others. By knowing the object that is focused by the operator, various interaction interfaces may be developed. This paper focuses on measuring with precision the convergent distance from an operator working inside an immersive virtual environment, to the gazed virtual object. Measurement errors are handled by an error filtration algorithm. The study concludes with proposing a method of selecting gazed virtual objects using proximity selection.