Table 2.
Eye tracker acquisition parameters and their meanings.
| Type | Name | Explanation |
|---|---|---|
| Basic Information | Recording Timestamp (ms) | Timestamp of eye tracking data |
| Time of Day (HH: mm: SS: ms) | Recording time of eye movement data | |
| Stimulus | Recording name | |
| Participant | Participant name | |
| Tracker Ratio (%) | The ratio of the captured effective gaze point to the frame rate | |
| Video Time (HH: mm: SS: ms) | Recording time relative to video recording start time | |
| Pupil Information | Validity Left | Validity of left eye pupil recognition: 0 means the recognition is successful; 1 means the recognition fails |
| Validity Right | Validity of right eye pupil recognition: 0 means the recognition is successful; 1 means the recognition fails | |
| Pupil Diameter Left (mm) | Left eye pupil diameter | |
| Pupil Diameter Right (mm) | Right eye pupil diameter | |
| IPD (mm) | Interpupillary distance | |
| Gaze Point Information | Gaze Point Index | Original gaze point index |
| Gaze Point X (px) | Original fixation x-coordinate in pixels | |
| Gaze Point Y (px) | Original fixation y-coordinate in pixels | |
| Gaze Point Right X (px) | X-coordinate of the original gaze point of the right eye | |
| Gaze Point Right Y (px) | Y-coordinate of the original gaze point of the right eye | |
| Gaze Point Left X (px) | X-coordinate of the original gaze point of the left eye | |
| Gaze Point Left Y (px) | Y-coordinate of the original gaze point of the left eye | |
| Fixation Index | Aggregate gaze index | |
| Fixation Point X (px) | The x-coordinate of the gaze point in pixels | |
| Fixation Point Y (px) | The y-coordinate of the gaze point in pixels | |
| Fixation Duration (ms) | Gaze duration | |
| Gaze Vector Left X | The x-coordinate of the left eye gaze vector | |
| Gaze Vector Left Y | The y-coordinate of the left eye gaze vector | |
| Gaze Vector Left Z | The z-coordinate of the left eye gaze vector | |
| Gaze Vector Right X | The x-coordinate of the right eye gaze vector | |
| Gaze Vector Right Y | The y-coordinate of the right eye gaze vector | |
| Gaze Vector Right Z | The z-coordinate of the left eye gaze vector | |
| Saccade Information | Saccade Index | Saccade index |
| Saccade Amplitude (px) | Saccade amplitude, angle value | |
| Saccade Velocity Average (px/ms) | Average velocity of saccade | |
| Saccade Single Velocity (px/ms) | Average saccade velocity per frame | |
| Saccade Velocity Peak (px/ms) | Velocity peaks during saccades | |
| Blink Information | Blink Index | Blink index |
| Blink Duration (ms) | Duration of blink | |
| Blink Eye | Blink label: 0 for double wink; 1 for left wing; 2 for right wing |