Classifying raw data into relevant eye movements is an important process of eye tracking research. This page will give you a short overview of how eye movements are classified in Tobii's eye tracking analysis softwares - Tobii Studio and Tobii Pro Glasses Analyzer.
During a recording an eye tracker collects raw eye movement data points according to its sampling rate (either 30, 60, 120 or 300Hz in the case of Tobii Pro Eye Trackers). Each data point is identified by a timestamp and x, y coordinates and sent to the analysis application (e.g. Tobii Pro Studio, Tobii Pro Glasses Analyzer or an application using Tobii Pro SDK APIs) database running on the computer connected to the eye tracker. In order to visualize and interpret the data these raw data points are further processed into attentional eye movements, such as fixations, and overlaid on
Tobii Pro Studio has three different types of fixation filters to