Ultra Low Cost Eye Gaze Tracking for Virtual Environments

In this paper we present an ultra-low cost eye gaze tracker specifically aimed at studying visual attention in 3D virtual environments. We capture camera view and user eye gaze for each frame and project vectors back into the environment to visualize where and what subjects view over time. Additionally we show one measure of calculating the accuracy in 3D space by creating vectors from the stored data and projecting them onto a fixed sphere. The ratio of hits to non-hits provides a measure of 3D sensitivity of the setup.