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Infrared photographs with a selective wavelength filter to diagnose small-angle esotropia in young children

Yung Ju Yoo1, Hee Kyung Yang2, Jong-Mo Seo3

  • 1Department of Ophthalmology, Kangwon National University Hospital, Kangwon National University Graduate School of Medicine, Chuncheon, South Korea.

Graefe'S Archive for Clinical and Experimental Ophthalmology = Albrecht Von Graefes Archiv Fur Klinische Und Experimentelle Ophthalmologie
|January 21, 2019
PubMed

Insights

Infrared photograph analysis effectively diagnoses small-angle esotropia in young children. This method showed strong correlation with manual measurements, offering a simple and effective diagnostic tool.

Area of Science:

  • Ophthalmology
  • Pediatric ophthalmology
  • Strabismus diagnosis

Background:

  • Small-angle esotropia is challenging to diagnose in children under 4.
  • Accurate diagnosis is crucial for timely intervention and preventing amblyopia.

Purpose of the Study:

  • To validate the effectiveness of selective wavelength filter analysis using infrared photographs for diagnosing small-angle esotropia in children under 4.
  • To assess the correlation between infrared photograph analysis and manual clinical measurements.

Main Methods:

  • Retrospective, observational, case-control study including 83 esotropes and 75 orthotropic controls under 4 years.
  • Infrared photographs with selective wavelength filters were analyzed using the 3D Strabismus Photo Analyzer.
  • Ocular alignment was measured using alternate prism and cover test or Krimsky test.

Main Results:

  • Testability of infrared photographs was 85.6%.
  • Infrared photograph analysis showed strong positive correlation (R=0.815) with manual measurements (11.5±4.4 PD vs 11.3±4.0 PD).
  • Sensitivity and specificity for detecting small-angle esotropia were 95.2% and 77.9% respectively, with a 4.0 PD cutoff.

Conclusions:

  • Automated infrared photograph analysis is a simple and effective method for diagnosing small-angle esotropia in young children.
  • This technique offers a reliable, non-invasive approach to strabismus assessment in pre-verbal or uncooperative children.
Abstract

Keywords:
AlignmentEsotropiaImage analysisSelective wavelength filter

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