Eyelink portable duo eye tracker

Manufactured by SR Research

Sourced in Canada

The EyeLink Portable Duo is a high-performance, lightweight eye tracker designed for versatile applications. It provides accurate and reliable eye movement data collection, enabling researchers to study visual attention and behavior across a wide range of settings.

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Lab products found in correlation

Actichamp, by Brain Products (1 mentions) Braincap, by Brain Products (1 mentions)

3 protocols using eyelink portable duo eye tracker

Eye Movement Tracking in a Controlled Lab Setting

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The participants completed three eye movement tasks in a quiet
laboratory. The visual stimuli were presented against a gray background
on a 21-inch ViewSonic LCD monitor. The refresh rate of this monitor was
144 Hz and its visible screen area measured 50° x 29.5° at a viewing
distance of 57 cm (maintained with a chinrest). Stimulus presentation
and eye-movement data recording were controlled by Python scripts
running on a Windows 10 gaming laptop. Eye movement data were recorded
at 1000 Hz with an EyeLink Portable Duo eye tracker (SR Research,
Ottawa, Canada). The tracker was set to record binocular gaze data, but
in rare occasions where only one eye could be reliably tracked,
monocular gaze data was recorded. The typical tracking accuracy of this
tracker was reported to be around 0.25°-0.5° (42 ).

Duan X., Huang Z., Zhang S., Zhu G., Wang R, & Wang Z. (2024). SARS-CoV-2 Infection Impairs Oculomotor Functions: A Longitudinal Eye-tracking Study. Journal of Eye Movement Research, 17(1), 10.16910/jemr.17.1.2.

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Multimodal Neurophysiological Recording Protocol

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The electroencephalogram (EEG) was recorded at a sampling rate of 500 Hz from a 31 channel ActiChamp amplifier and a 31 active electrode Braincap (Brain Products GmbH, Gilching, Germany). The electrodes were placed according to the extended 10–20 system: Fp1, Fp2, F7, F3, Fz, F4, F8, FC5, FC1, FC2, FC6, T7, C3, Cz, C4, T8, CP5, CP1, CP2, CP6, P7, P3, Pz, P4, P8, Oz, and at the left (M1) and right (M2) mastoids. Three electrodes recording the horizontal and vertical electrooculogram (EOG) were positioned to the left and right of the outer canthi of the eyes and below the left eye. The reference electrode was placed at the tip of the nose.
The pupil diameter of both eyes was recorded with an infrared EyeLink Portable Duo eye-tracker (SR Research Ltd., Mississauga, Ontario, Canada). The eye tracking was set up in remote mode at a sampling rate of 500 Hz.

Bonmassar C., Widmann A, & Wetzel N. (2020). The impact of novelty and emotion on attention-related neuronal and pupil responses in children. Developmental Cognitive Neuroscience, 42, 100766.

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Video-based Eye Tracking for Saccadic Dysfunction

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Video-based eye tracking system [Eye Link portable duo eye tracker (SR Research Ltd, Mississauga, Ontario, Canada)] was used to evaluate the presence of SWJs. Participants were seated in front of a computer monitor (24-inch, 531 × 299 mm) with a full HD resolution of 1920 × 1080 pixels and a refresh rate of 60 Hz. The participant's head was stabilised by a chin rest and the viewing distance was maintained at 60 cm according to the instrument procedure. A standard 5-point calibration procedure was run before the experiment. The calibration targets were presented randomly in 5 different positions on the screen. Immediately following the calibration procedure, a 5-s fixation task was administered, instructing the participants to keep their eyes on a red point of 1° of size shown in the central position on the screen. Participants were simply required to fixate the point without any other indication of time and task. Subsequently, a task to assess upward and downward saccadic performance was performed as previously described [14] (link).

Facchin A., Buonocore J., Crasà M., Quattrone A, & Quattrone A. (2024). Systematic assessment of square-wave jerks in progressive supranuclear palsy: a video-oculographic study. Journal of neurology.

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