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Study on Binocular Accommodative Function in Children With Different Types of Intermittent Exotropia

Dan Li1, Kun-Ling Li1, Jing Wang1

  • 1Department of Ophthalmology, Affiliated Hospital of Hebei University, Baoding, China.

Frontiers in Pediatrics
|November 4, 2021
PubMed

Insights

Children with intermittent exotropia (IXT) show differences in accommodative amplitude and function between their eyes. Their overall binocular accommodative function is reduced compared to non-strabismic children, varying by IXT type.

Area of Science:

  • Ophthalmology
  • Pediatric Optometry
  • Vision Science

Background:

  • Intermittent exotropia (IXT) is a common childhood strabismus.
  • Understanding accommodative function in IXT is crucial for effective management.
  • Previous research has not fully elucidated differences in accommodation based on IXT subtypes.

Purpose of the Study:

  • To investigate monocular and binocular accommodative amplitude (AMP) and accommodative function (AF) in children with different types of IXT.
  • To compare accommodative parameters between fixing and non-fixing eyes in children with IXT.
  • To compare accommodative parameters between different IXT subtypes and a control group.

Main Methods:

  • A cohort of 40 children diagnosed with IXT was studied.
  • Monocular and binocular AMP and AF were measured using the modified approach and ±2D flip methods.
  • Data were analyzed to compare differences between fixing/non-fixing eyes and between IXT groups and controls.

Main Results:

  • Fixing eyes in children with IXT had lower AMP (p=0.007) and higher AF (p<0.001) than non-fixing eyes.
  • All IXT groups exhibited lower AMPs than the control group.
  • Children with convergence insufficiency had the lowest AMP and AF compared to other IXT types and controls (p<0.05).

Conclusions:

  • Significant differences exist in accommodation between fixing and non-fixing eyes in children with IXT.
  • The extent of accommodative variation is dependent on the specific type of IXT.
  • Binocular accommodative function is demonstrably lower in children with IXT compared to their non-strabismic peers.

Keywords:
accommodative amplitudeaccommodative facilitybinocularintermittent exotropiamonocular

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