July 16, 2010

What You Always Wanted to Know About Eye Tracking - Part 2: Data Accuracy

After discussing the issue of fixation detection in the first part of the series, this post will provide some additional basic knowledge about the eye tracking technology before diving into some more advanced conceptual aspects of eye tracking in part three.

An essential part of the eye tracking setup is the camera that captures light reflected by the eye in order to analyze the information and, on that basis, determine the gaze direction. If the eye tracker is not head-mounted, the camera is often positioned statically, e.g., above or below a computer monitor on which the "test material" is displayed.