openEyes is an open-source open-hardware toolkit for low-cost real-time eye tracking.

Li, D., and Parkhurst, D. J. (2006). Open-source software for real-time visible-spectrum eye tracking. Proceedings of the COGAIN Conference, pgs. 18 - 20.

Li, D. (2006). Low-cost eye-tracking for human computer interaction. Masters Thesis, Iowa State University Human Computer Interaction Program.

Li, D., Babcock, J., Parkhurst, D. J. (2006). openEyes: A low-cost head-mounted eye-tracking solution. Proceedings of the ACM Eye Tracking Research and Applications Symposium.

Li, D., Parkhurst, D. J. (2005). Starburst: A robust algorithm for video-based eye tracking. Unpublished manuscript.

Li, D., Winfield, D., Parkhurst, D. J. (2005). Starburst: A hybrid algorithm for video-based eye tracking combining feature-based and model-based approaches. Proceedings of the IEEE Vision for Human-Computer Interaction Workshop at CVPR, 1-8.

Winfield, D., Li, D., Babcock, J., Parkhurst, D. J. (2005). Towards an open-hardware open-software toolkit for robust low-cost eye tracking in HCI applications. Iowa State University Human Computer Interaction Technical Report ISU-HCI-2005-04.