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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
Summary
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.
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