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Related Experiment Video

Updated: Jun 18, 2025

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Oculomotor Behaviour in Individuals with Long COVID-19.

L González-Vides1,2, J L Hernández-Verdejo3, J A Gómez-Pedrero4

  • 1Optic and Optometry Faculty, Complutense University of Madrid, Madrid, Spain.

Clinical Rehabilitation
|August 2, 2024
PubMed
Summary

Long COVID-19 significantly impacts oculomotor behavior, showing lower performance in eye movement tests compared to healthy individuals. These findings suggest potential cognitive alterations rather than ocular muscle dysfunction.

Keywords:
Long COVID-19eye movementseye-trackingoculomotor behaviourvisual rehabilitation

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Area of Science:

  • Ophthalmology
  • Neurology
  • Infectious Diseases

Background:

  • Long COVID-19, a persistent condition post-SARS-CoV-2 infection, can manifest with diverse neurological symptoms.
  • Oculomotor behavior, crucial for visual processing and daily tasks, may be affected by post-viral complications.

Purpose of the Study:

  • To investigate the impact of long COVID-19 on oculomotor behavior using standardized eye movement assessments.
  • To compare oculomotor performance between individuals with long COVID-19 and healthy controls.

Main Methods:

  • A case-control study involving 75 long COVID-19 cases and 42 healthy controls.
  • Utilized the Adult Developmental Eye Movement Test and an eye-tracking test with a visual search paradigm.
  • Assessed parameters including reading times, fixation duration, number of fixations, and time to target acquisition.

Main Results:

  • Long COVID-19 cases exhibited significantly prolonged horizontal and vertical reading times (p < .0001).
  • Eye-tracking revealed a higher number of fixations (p < .0001) and longer fixation duration (p = .0013) in cases.
  • Cases also showed a longer time to find the target (p = .0034) compared to controls.

Conclusions:

  • Individuals with long COVID-19 demonstrate impaired oculomotor behavior compared to healthy individuals.
  • The observed deficits may be linked to cognitive alterations rather than primary ocular muscle dysfunction.
  • The employed eye movement tests show promise as clinical assessment tools for long COVID-19 patients.