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Related Experiment Video

Updated: Mar 24, 2026

Eye-tracking to Distinguish Comprehension-based and Oculomotor-based Regressive Eye Movements During Reading
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A Preliminary Study on Comparative Eye Tracking Analysis Using a Meta Quest Pro.

Syed Ali Naqi Raza1, Yongwon Cho1, Si-An Lee1

  • 1Soonchunhyang University, Asan, Republic of Korea.

Inquiry : a Journal of Medical Care Organization, Provision and Financing
|March 23, 2026
PubMed
Summary
This summary is machine-generated.

Inter-eye distance variations, including outer canthal distance (OCD), interpupillary distance (IPD), and intercanthal distance (ICD), do not significantly impact Meta Quest Pro

Keywords:
eye and facial trackingintercanthal distanceinterpupillary distancemeta quest prooutercanthal distancevirtual reality

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Area of Science:

  • Human-Computer Interaction
  • Virtual Reality (VR) Technology
  • Ophthalmology and Vision Science

Background:

  • Meta Quest Pro's eye and facial tracking is crucial for research in visual attention, cognition, and behavior.
  • Individual anatomical differences in eye spacing (e.g., Outer Canthal Distance, Interpupillary Distance, Intercanthal Distance) may affect eye-tracking accuracy.
  • Understanding these variations is key to reliable data collection in VR research.

Purpose of the Study:

  • To evaluate the impact of inter-eye distance variations on eye-movement feature extraction using the Meta Quest Pro.
  • To assess the accuracy and reliability of eye-tracking data across different facial anatomies in a VR environment.

Main Methods:

  • Recruited 16 participants (ages 21-30) to minimize variability.
  • Collected eye measurements (OCD, IPD, ICD), performed eye calibration, and conducted three VR tasks (fixed gaze, regular, irregular eye movements).
  • Utilized statistical analyses including Shapiro-Wilk, D'Agostino-Pearson, Spearman Correlation, Kruskal-Wallis, and Mann-Whitney U tests.

Main Results:

  • No significant influence of inter-eye distance on eye movement tracking accuracy was found (P ≥ .60).
  • Strong bilateral correlations for gaze features (Spearman ρ = 0.84-0.99) were consistent across all groups.
  • Spatial accuracy remained stable, with angular error between 1.11° and 1.36° regardless of eye distance.

Conclusions:

  • Inter-eye distance variations do not appear to significantly affect the accuracy of eye-tracking data from the Meta Quest Pro.
  • The Meta Quest Pro demonstrates reliable eye-tracking performance across a range of participant eye anatomies.
  • Findings support the use of Meta Quest Pro for diverse populations in VR research without major concerns about anatomical eye distance.