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Related Experiment Video

Updated: Feb 16, 2026

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Development of a test grid using Eye Movement Perimetry for screening glaucomatous visual field defects.

N S Kadavath Meethal1,2, D Mazumdar1,2, R Asokan1

  • 1Medical and Vision Research Foundation, Chennai, India.

Graefe'S Archive for Clinical and Experimental Ophthalmology = Albrecht Von Graefes Archiv Fur Klinische Und Experimentelle Ophthalmologie
|December 29, 2017
PubMed
Summary

This study developed a 26-location Eye Movement Perimetry (EMP) screening grid to detect glaucoma. The new grid accurately identifies glaucomatous visual field defects by analyzing Saccadic Eye Movement (SEM) responses.

Keywords:
Eye Movement PerimetryGlaucomaSaccadic Reaction TimeScreening

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Area of Science:

  • Ophthalmology
  • Neuroscience
  • Medical Imaging

Background:

  • Eye Movement Perimetry (EMP) evaluates visual fields using Saccadic Eye Movement (SEM) responses.
  • Previous research indicates delayed SEM initiation in glaucoma patients compared to healthy individuals.
  • This study aimed to create an EMP-based screening tool for identifying glaucomatous visual field defects.

Purpose of the Study:

  • To develop and validate an Eye Movement Perimetry (EMP) screening grid for glaucoma detection.
  • To identify specific visual field locations most susceptible to glaucomatous damage using Saccadic Reaction Time (SRT).
  • To refine the EMP test for efficient and accurate population-based glaucoma screening.

Main Methods:

  • An interactive 36-location test with two stimulus contrasts was evaluated in 54 healthy subjects and 50 glaucoma patients.
  • Saccadic Reaction Time (SRT) was measured using an eye tracker for each stimulus presentation.
  • Receiver Operating Characteristic (ROC) analysis and Area Under the Curve (AUC) determined the most effective test locations, eliminating those with AUC < 0.75.

Main Results:

  • Glaucoma patients exhibited a significant 76.5% increase in SRT compared to healthy subjects (p < 0.001).
  • ROC analysis led to the elimination of 10 locations, resulting in a refined 26-location screening grid.
  • The refined grid maintained significant SRT differences between healthy and glaucoma groups (p < 0.05).

Conclusions:

  • A 26-location EMP screening grid was successfully developed, focusing on nasal, superior, and inferior visual field areas.
  • The modified grid demonstrated a high screening accuracy of 90.4% in internal validation.
  • This EMP-based approach shows promise as a tool for population-based glaucoma screening.