EyeLink Device¶
Description¶
Digital interface to an EyeLink eye tracker. Tested with the EyeLink 1000 and EyeLink II trackers, but may be compatible with additional devices.
If the tracker is run in binocular mode, eye_x, eye_y, and eye_z give the midpoint of the shortest connecting line that is orthogonal to both gaze vectors; otherwise, these values will be empty. All other output parameters are specified and described in the EyeLink 1000 User Manual.
Signature¶
iodevice/eyelink
Required Parameters¶
tracking_dist¶
| Example: | 1024 |
|---|
Tracking range in eye tracker units. (The default value should be 1024.)
data_interval¶
| Example: | 1ms |
|---|
Data polling interval. Should not be too short, but faster than tracker’s sampling rate.
Optional Parameters¶
eye_rx¶
Variable in which to store right eye screen gaze x
eye_ry¶
Variable in which to store right eye screen gaze y
eye_lx¶
Variable in which to store left eye screen gaze x
eye_ly¶
Variable in which to store left eye screen gaze y
eye_x¶
Variable in which to store computed eye_x (described above)
eye_y¶
Variable in which to store computed eye_y (described above)
eye_z¶
Variable in which to store computed eye_z (described above)
href_rx¶
Variable in which to store right eye headref x
href_ry¶
Variable in which to store right eye headref y
href_lx¶
Variable in which to store left eye headref x
href_ly¶
Variable in which to store left eye headref y
pupil_rx¶
Variable in which to store right eye pupil x
pupil_ry¶
Variable in which to store right eye pupil y
pupil_lx¶
Variable in which to store left eye pupil x
pupil_ly¶
Variable in which to store left eye pupil y
pupil_size_r¶
Variable in which to store right pupil size or area
pupil_size_l¶
Variable in which to store left pupil size or area
eye_time¶
Variable in which to store time of sample (on EyeLink clock)
alt¶
Alternative device to use if this one fails to initialize (e.g. because the required hardware is not available). If #allowAltFailover is set to 0 or false, this parameter is ignored.