Gaze points are the most basic units of measurement used in eye tracking research. Each gaze point is an individual record of the participant’s gaze at a given moment. The number of these individual moments per second depends on the sampling rate of eye tracking device. For example, if the eye tracker sampling rate is 60hz it means that each gaze point equals one-sixtieth of a second.
Fixations are groups of gaze points that appeared next to each other for a specific period of time (about 100-300 milliseconds). Fixations indicate that the participant focused their attention on a specific object that appeared in the frame.