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Pupil Core Eye Tracker

Pupil Core is a wearable, head-mounted eye tracking system developed by Pupil Labs. It is designed for research and advanced prototyping, enabling accurate measurement of eye movements in both laboratory and real-world environments.

The system is intended for research and development use.

Pupil Core

Image © Pupil Labs. Used for documentation and identification purposes.

Measurement Capabilities

Pupil Core supports measurement of:

  • Gaze position in the scene camera coordinate system
  • Fixations and saccades
  • Blink events
  • Pupil size and pupil dynamics

Eye tracking is based on video-based pupil detection using infrared illumination and dark-pupil detection.

Hardware Components

  • Eye cameras
  • Infrared-sensitive cameras with IR illumination

  • Mounted close to the eye to capture pupil images

  • Scene camera

  • Forward-facing RGB camera

  • Captures the user’s field of view

  • Headset

  • Lightweight, modular frame

  • Adjustable mounts for eye and scene cameras

  • Processing and connectivity

  • USB connection to a host computer
  • Power and data provided via USB

Technical Specifications (typical)

  • Eye camera frame rate: up to 200 Hz (depending on model)
  • Scene camera resolution: up to 1920 × 1080
  • Scene camera frame rate: up to 120 Hz (depending on configuration)
  • Gaze accuracy: approximately 0.6° visual angle under controlled conditions
  • System latency: approximately 45 ms (eye pipeline)

Exact specifications depend on the selected camera modules.

Software

Pupil Core uses open-source software maintained by Pupil Labs:

  • Pupil Capture
  • Real-time pupil detection and gaze estimation

  • Live visualization and recording

  • Pupil Player

  • Playback and visualization of recorded data
  • Inspection of gaze, pupil, and video streams

The software is extensible via plugins and supports custom processing pipelines.

Supported platforms: - Windows
- macOS
- Linux

Data and Synchronization

  • Recording of raw video, gaze data, and timestamps
  • Real-time data streaming
  • Synchronization with external systems via:
  • Lab Streaming Layer (LSL)
  • Network-based messaging

This enables multimodal experiments combining eye tracking with EEG, fNIRS, motion capture, or physiological sensors.

Use Cases

  • Human–computer interaction research
  • Cognitive and behavioral studies
  • Usability and user experience evaluation
  • Multimodal neuroscience experiments
  • Mobile and real-world gaze studies

More Information

Technical specifications and hardware options:
https://pupil-labs.com/products/core/tech-specs

Manufacturer: Pupil Labs GmbH, Berlin, Germany

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