software: TrackEye : Real-Time Tracking Of Human Eyes Using a Webcam

Eyes are the most important features of the human face. So effective
usage of eye movements as a communication technique in
user-to-computer interfaces can find place in various application
areas.

Eye tracking and the information provided by the eye features have the
potential to become an interesting way of communicating with a
computer in a human-computer interaction (HCI) system. So with this
motivation, designing a real-time eye feature tracking software is the
aim of this project.

The purpose of the project is to implement a real-time eye-feature
tracker with the following capabilities:

* RealTime face tracking with scale and rotation invariance
* Tracking the eye areas individually
* Tracking eye features
* Eye gaze direction finding
* Remote controlling using eye movements

http://www.codeproject.com/KB/cpp/TrackEye.aspx