Eye Tracker Technical Specifications
The EyeLink Portable Duo is a portable, screen-based eye tracker that enables accurate and precise data for research, both in and out of the lab (up to 2000 Hz). See below for the technical specifications of the EyeLink Portable Duo tracker features. Get in touch with us with any questions, or request a quote. We are here to help. You can also see the technical comparison between the EyeLink 1000 Plus, EyeLink Duo, and EyeLink 3.
Sampling Rate
Head Stabilized Tracking
Monocular or Binocular
250, 500, 1000, 2000 Hz
Remote, Head Free-to-Move Tracking
Monocular or Binocular
250, 500, 1000 Hz
Eye Tracking Principle
Pupil with Corneal Reflection
Average Accuracy¹
Down to 0.15° (0.25° to 0.5° Typical)
Saccade Event Resolution
Resolution 0.05° Microsaccades
Spatial Resolution²
0.01°
Noise with Participants¹
Head Stabilized Tracking
Filter (Off / Normal / High)
1000 Hz: 0.03°/ 0.02°/ 0.01°
2000 Hz: 0.05°/ 0.03°/ 0.02°
Remote, Head Free-to-Move Tracking
Filter (Off / Normal / High)
500 Hz: 0.03°/ 0.02°/ 0.01°
1000 Hz: 0.05°/ 0.03°/ 0.01°
End-to-End Sample Delay³
Head Stabilized Tracking
M = 1.34 msec, SD = 0.18 msec @ 2000 Hz
M = 1.88 msec, SD = 0.36 msec @ 1000 Hz
Remote, Head Free-to-Move Tracking
M = 2.10 msec, SD = 0.37 msec @ 1000 Hz
M = 3.21 msec, SD = 0.61 msec @ 500 Hz
Blink Recovery Time
Head Stabilized Tracking
0.5 ms @ 2000 Hz
1.0 ms @ 1000 Hz
Remote, Head Free-to-Move Tracking
1.0 ms @ 1000 Hz
2.0 ms @ 500 Hz
Pupil Detection Models
Head Stabilized Tracking
0.5 ms @ 2000 Hz
1.0 ms @ 1000 Hz
Remote, Head Free-to-Move Tracking
1.0 ms @ 1000 Hz
2.0 ms @ 500 Hz
Pupil Size Resolution¹
0.1% of diameter
Gaze Tracking Range
Customizable – Default is 32° horizontally, 25° vertically
Allowable Head Movement
Head Stabilized Tracking
±25 mm horizontal or vertical
Remote, Head Free-to-Move Tracking
20 cm horizontal X 20 cm vertical at 52 cm
Optimal Camera-Eye Distance
42–62 cm
Glasses Compatibility
Excellent
Online Event Parsing
Fixations / Saccade / Blink / Fixation Update
EDF File and Link Data Type
Gaze, Raw, and HREF Eye Position Data / Pupil Size / Online Events / Buttons / Messages / Digital Inputs
Real-Time Operator Feedback
Eye position gaze cursor superimposed on static image or position traces with camera images and tracking status
Certifications
IEC 60601-1 ed. 3., AAMI ES60601-1, CSA C22.2#60601-1 ed. 3.1, IEC 62366 ed. 1, ISO 15004-1, ed. 1, ISO 15004-2, IEC 62471
ed. 1, ISO 14971. ed. 2, IEC 60601-1-6 ed. 3.0, IEC 60601-1-2, ed. 4
Specifications are subject to change without notice. Availability of some features depends on options purchased.
¹Measured with real subject fixations.
²Unfiltered data measured with an artificial eye.
³Time from physical event until first registered sample (unfiltered) is available via Ethernet.