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Related Experiment Video

Updated: May 5, 2026

Assessing Early Stage Open-Angle Glaucoma in Patients by Isolated-Check Visual Evoked Potential
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Navigation performance in glaucoma: virtual-reality-based assessment of path integration.

Safa Andac1, Francie H Stolle1, Matthieu Bernard2

  • 1Ophthalmic Department, Section for Clinical and Experimental Sensory Physiology, Otto-Von-Guericke University Magdeburg, Leipziger Str. 44, 39120, Magdeburg, Germany.

Scientific Reports
|September 12, 2024
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Summary

Glaucoma patients exhibit impaired navigation skills, taking longer to complete tasks in virtual reality. Navigation difficulties increase with glaucoma severity, potentially impacting daily life quality.

Keywords:
GlaucomaNavigationPath integrationVirtual realityVisual field

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Area of Science:

  • Ophthalmology
  • Neuroscience
  • Human Navigation

Background:

  • Navigation is crucial for daily activities.
  • Glaucoma, a progressive optic neuropathy, can affect visual field sensitivity and retinal nerve fiber layer thickness.
  • Visual impairment may impact spatial navigation abilities.

Purpose of the Study:

  • To investigate the relationship between glaucoma-induced visual impairment and path-integration-based navigation.
  • To quantify navigation performance in glaucoma patients compared to controls in virtual reality environments.
  • To identify specific visual function parameters correlating with navigation deficits in glaucoma.

Main Methods:

  • 14 glaucoma patients and 15 controls underwent ophthalmological examinations (visual acuity, visual field mean deviation (MD), peripapillary retinal nerve fiber layer (pRNFL)).
  • Participants navigated virtual reality environments under daylight and dawn conditions, performing a path traversal and pointing task.
  • Navigation outcomes included travel time, pointing time, and Euclidean distance error; analyzed using robust linear regression.

Main Results:

  • Glaucoma patients demonstrated significantly increased travel-time (8.2 ± 1.7 s, p=0.002) and pointing-time (5.3 ± 1.6 s, p=0.016) compared to controls.
  • Mean deviation (MD) of visual fields was a significant predictor for all navigation outcome measures (p<0.01).
  • Peripapillary retinal nerve fiber layer (pRNFL) thickness also predicted travel-time (p<0.01).

Conclusions:

  • Glaucoma significantly impairs path-integration-based navigation, leading to increased task completion times.
  • Navigation deficits are correlated with the severity of visual impairment, specifically with mean deviation and pRNFL thickness.
  • These navigation challenges may negatively affect the quality of life for individuals with glaucoma.