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Altered Large-Scale Resting-State Functional Network Connectivity in Convergence Insufficiency Young Adults Compared

Farzin Hajebrahimi1, Suril Gohel1, Mitchell Scheiman2

  • 1Department of Health Informatics, Rutgers University School of Health Professions, Newark, New Jersey, United States.

Investigative Ophthalmology & Visual Science
|November 20, 2023
PubMed
Summary
This summary is machine-generated.

This study found decreased resting-state functional connectivity (RSFC) in adults with convergence insufficiency (CI) compared to controls. These neural differences correlate with visual function deficits, suggesting a neurophysiological basis for CI.

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Area of Science:

  • Neuroscience
  • Ophthalmology
  • Medical Imaging

Background:

  • Convergence insufficiency (CI) is a common visual disorder affecting near work.
  • The neurophysiological underpinnings of CI are not fully understood.

Purpose of the Study:

  • To investigate resting-state functional connectivity (RSFC) differences in symptomatic CI patients versus binocularly normal controls (BNC).
  • To explore the relationship between RSFC alterations and clinical measures of CI.

Main Methods:

  • Functional magnetic resonance imaging (fMRI) was used to assess RSFC in 49 CI patients and 47 BNC.
  • Group-level independent components analysis and dual regression were employed.
  • Linear regression analyzed correlations between clinical visual function measures and RSFC.

Main Results:

  • Patients with CI exhibited decreased RSFC within the frontoparietal, default mode, and visual networks compared to BNC.
  • Default mode network RSFC strength correlated significantly with near point of convergence and vergence measures.

Conclusions:

  • Altered RSFC is evident in individuals with CI compared to controls.
  • These neurophysiological differences may be linked to the optometric visual functions used to diagnose CI.