Table 2.

Fixations and Eye Gaze Spreadsheets.

Data Type/Column Name	Description
DICOM-ID	DICOM ID from original MIMIC dataset.
CNT	The counter data variable is incremented by 1 for each data record sent by the server. Useful to determine if any data packets are missed by the client.
TIME(in secs)	The time elapsed in seconds since the last system initialization or calibration. The time stamp is recorded at the end of the transmission of the image from camera to computer. Useful for synchronization and to determine if the server computer is processing the images at the full frame rate. For a 60 Hz camera, the TIME value should increment by 1/60 seconds.
TIMETICK(f = 10000000)	This is a signed 64-bit integer which indicates the number of CPU time ticks for high precision synchronization with other data collected on the same CPU.
FPOGX	The X- coordinates of the fixation POG, as a fraction of the screen size. (0,0) is top left, (0.5,0.5) is the screen center, and (1.0,1.0) is bottom right.
FPOGY	The Y-coordinates of the fixation POG, as a fraction of the screen size. (0,0) is top left, (0.5,0.5) is the screen center, and (1.0,1.0) is bottom right.
FPOGS	The starting time of the fixation POG in seconds since the system initialization or calibration.
FPOGD	The duration of the fixation POG in seconds
FPOGID	The fixation POG ID number
FPOGV	The valid flag with value of 1 (TRUE) if the fixation POG data is valid, and 0 (FALSE) if it is not. FPOGV valid is TRUE ONLY when either one, or both, of the eyes are detected AND a fixation is detected. FPOGV is FALSE all other times, for example when the participant blinks, when there is no face in the field of view, when the eyes move to the next fixation (i.e., a saccade)
BPOGX	The X-coordinates of the best eye POG, as a fraction of the screen size.
BPOGY	The Y-coordinates of the best eye POG, as a fraction of the screen size.
BPOGV	The valid flag with value of 1 if the data is valid, and 0 if it is not.
LPCX	The X-coordinates of the left eye pupil in the camera image, as a fraction of the camera image size.
LPCY	The Y-coordinates of the left eye pupil in the camera image, as a fraction of the camera image size.
LPD	The diameter of the left eye pupil in pixels
LPS	The scale factor of the left eye pupil (unitless). Value equals 1 at calibration depth, is less than 1 when user is closer to the eye tracker and greater than 1 when user is further away.
LPV	The valid flag with value of 1 if the data is valid, and 0 if it is not.
RPCX	The X-coordinates of the right eye pupil in the camera image, as a fraction of the camera image size.
RPCY	The Y-coordinates of the right eye pupil in the camera image, as a fraction of the camera image size.
RPD	The diameter of the right eye pupil in pixels
RPS	The scale factor of the right eye pupil (unitless). Value equals 1 at calibration depth, is less than 1 when user is closer to the eye tracker and greater than 1 when user is further away.
RPV	The valid flag with value of 1 if the data is valid, and 0 if it is not.
BKID	Each blink is assigned an ID value and incremented by one. The BKID value equals 0 for every record where no blink has been detected.
BKDUR	The duration of the preceding blink in seconds.
BKPMIN	The number of blinks in the previous 60 second period of time.
LPMM	The diameter of the left eye pupil in millimeters.
LPMMV	The valid flag with value of 1 if the data is valid, and 0 if it is not.
RPMM	The diameter of the right eye pupil in millimeters.
RPMMV	The valid flag with value of 1 if the data is valid, and 0 if it is not.
SACCADE-MAG	Magnitude of the saccade calculated as distance between each fixation (in pixels).
SACCADE-DIR	The direction or angle between each fixation (in degrees from horizontal).
X_ORIGINAL	The X coordinate of the fixation in original DICOM image.
Y_ORIGINAL	The Y coordinate of the fixation in original DICOM image.