User`s manual

Appendix C Data Output
Different applications can be connected as clients to the eye tracker to, e.g., gather eye gaze data in real-time and perform
calibrations. Applications that can be used together with the eye tracker include the Tobii Studio software, third party software
products, or your own custom software based on the Tobii Software Development Kit. For more information about the supported
software products please refer to the product descriptions and documentation for the respective products.
Below is a summary of the data that the eye tracker outputs. Please note that the parameter names, definitions and coordinate
systems may differ depending on the software used, please refer to the software documentation for additional information.
TTiimmeessttaammpp Timestamp in microseconds from the eye tracker’s internal clock. Additional timestamps are
available in Tobii Studio.
GGaazzee PPooiinntt LLeefftt XX,, YY
Horizontal (X) and vertical (Y) coordinates of the gaze point for the left eye. Available in
different coordinate systems in Tobii Studio and the Tobii Software Development Kit.
EEyyee PPoossiittiioonn LLeefftt XX,, YY,, ZZ The 3D position of the left eye in relation to the eye tracker. Available in different coordinate
systems in Tobii Studio and the Tobii Software Development Kit.
PPuuppiill DDiiaammeetteerr LLeefftt Estimated diameter of the left eye pupil in millimeters.
VVaalliiddiittyy CCooddee LLeefftt
Indicates the confidence level that the left eye has been correctly identified by the eye tracker.
GGaazzee PPooiinntt RRiigghhtt XX,, YY
Horizontal (X) and vertical (Y) coordinates of the gaze point for the right eye. Available in
different coordinate systems in Tobii Studio and the Tobii Software Development Kit.
EEyyee PPoossiittiioonn RRiigghhtt XX,, YY,, ZZ The 3D position of the right eye in relation to the eye tracker. Available in different coordinate
systems in Tobii Studio and the Tobii Software Development Kit.
PPuuppiill DDiiaammeetteerr RRiigghhtt Estimated diameter of the left eye pupil in millimeters.
VVaalliiddiittyy CCooddee RRiigghhtt
Indicates the confidence level that the right eye has been correctly identified by the eye
tracker.
30
Appendix C Data Output
Tobii X2-60 Eye Tracker User’s manual v.1.0.3 - en-US