A system and method to calibrate a gaze point on a screen of an eye as the eye watches an object move on the screen. A movement of an eye may be tracked in a series of images, and a pattern of the movement of the eye may be detected. Detection of a pattern of eye movements that is associated with watching the moving object on a screen may be an indication that the eye was watching the object at the time that the pattern of eye movements was detected. The identified gaze point may be part of a calibration for purpose of gaze tracking. The detected pattern may be included in an indication that the viewer looked at the moving object.
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