Ocular motor / eye tracking

EyeLink 1000

Monash Biomedical Imaging offers both magnetic resonance (MR) compatible and non-MR compatible eye-tracking to facilitate testing in and out of our 3T MRI and Simultaneous MR-PET scanners. Our EyeLink 1000 eye-tracking equipment is located at our Clayton site.

Benefits of eye-tracking

  • Allows for tracking of pupil location and size (diameter) during behavioural experiments
  • Suitable for adults and children in both clinical and non-clinical populations
  • Monocular or binocular tracking at up to 1000 Hz
  • The EyeLink can be interfaced with behavioural experiments in Psychtoolbox (MATLAB), Presentation, E-Prime, Psychopy (Python), and Experiment Builder (EyeLink) software

Capabilities

  • This eye-tracking system can record eye-movements, pupil diameter, and monitor ocular motion
  • Consists of a high-speed camera connected to a dedicated host computer, which can sample eyes in real-time with incredibly low inter-sample variability
  • The desktop-mount model is used for non-MRI experiments and can perform both monocular and binocular eye-tracking
  • The long range MR-compatible model includes a fibre optic camera which is placed outside of the MRI scanner bore and enables eye-tracking during fMRI scans
  • Can be used in both resting state and functional or task based MRI scans

Research applications

  • Cognitive Neuroscience
  • Neuropsychology
  • Clinical Psychology

EyeLink 1000 technical specifications

Non-MR compatible ocular motor system

  • Sampling rate (monocular): 250, 500, 1000, 2000 Hz
  • Sampling rate (binocular): 250, 500, 1000 Hz
  • Average accuracy: 0.25º to 0.5º
  • Resolution: 0.01º RMS, micro-saccade resolution of 0.05º
  • Real-time data access: 1.4 msec (SD < 0.4 msec) @ 2000 Hz

MR compatible eye-tracking system

  • Fibre-optic camera can be used up to 150cm away from the eye
  • Sampling rate (monocular): 250, 500, 1000, 2000 Hz
  • Average accuracy: 0.25º to 0.5º
  • Resolution: 0.01º RMS, micro-saccade resolution of 0.05º
  • Real-time data access: 1.4 msec (SD < 0.4 msec) @ 2000 Hz

Additional support

Our Clinical Support Team can provide valuable guidance (computer software and hardware troubleshooting and installation, equipment troubleshooting, training, and neurobehavioural computer task programming) and our Administrative Team can help you navigate the relevant procedures.