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Vestibulo-ocular reflex evaluation of the children with acquired esotropia
Başak Mutlu1, Merve Torun Topçu1, Ahmet Mutlu2
1Istanbul Medeniyet University, Faculty of Health Sciences, Department of Audiology, Istanbul, Turkey.
Insights
This study found no significant differences in vestibulo-ocular reflex (VOR) gain between children with acquired esotropia and healthy controls using video head impulse (vHIT) and functional head impulse (fHIT) tests.
Area of Science:
- Ophthalmology
- Neuroscience
- Pediatrics
Background:
- Acquired esotropia can affect visual-motor function.
- The vestibulo-ocular reflex (VOR) stabilizes gaze during head movements.
- Evaluating VOR gain is crucial for understanding visual processing in children with esotropia.
Purpose of the Study:
- To assess the impact of acquired esotropia on VOR gain in pediatric patients.
- To compare VOR gain using video head impulse (vHIT) and functional head impulse (fHIT) tests.
- To differentiate effects in accommodative versus non-accommodative esotropia subgroups.
Main Methods:
- 62 children (6-18 years) with acquired esotropia and 21 healthy controls were enrolled.
- Patients were categorized into accommodative and non-accommodative esotropia groups.
- Lateral canal vHIT and fHIT were performed with monocular and binocular recordings.
Main Results:
- No significant differences in vHIT findings were observed between the esotropia and control groups (p>.05).
- Specific camera positions in vHIT recordings showed minor statistical differences in VOR gain for the non-accommodative and accommodative esotropia groups.
- No saccades were detected in any participant group.
Conclusions:
- Statistical variations in vHIT and fHIT results for acquired esotropia are likely sporadic.
- Current recording techniques for vHIT and fHIT are adequate for pediatric acquired esotropia.
- No modifications to vHIT or fHIT recording methods are necessary for this patient population.
Objectives:
This study aims to evaluate the effects of acquired esotropia on vestibulo-ocular reflex (VOR) gain in children using video (vHIT) and functional head impulse (fHIT) tests.
Methods:
A total of 62 children aged 6-18 years, with acquired esotropia and normal vision, were evaluated in the study. The patients were divided into two sub-groups: accommodative and non-accommodative. VOR gains were analyzed by performing lateral canal vHIT and fHIT with monocular and binocular recordings by a single examiner.
Results:
Seventeen (10 male, 7 female) children with accommodative esotropia, 24 (14 male, 10 female) children with non-accommodative esotropia, and 21 (8 male and 12 female) healthy controls were included in this study. The vHIT findings did not differ between the groups (p˃.05). In the non-accommodative esotropia group, the location of the camera in both binocular and monocular vHIT recordings made a significant difference in the left VOR gain (p = .025, z = -2.243, p = .032, and z = -2.143, respectively), but no difference was observed in the right VOR gain. In the accommodative esotropia group, while the camera was on the left there was a significant difference in the right VOR gain between binocular and monocular recordings (p = .016, z = -2.413) but no difference was observed in the left VOR gain. No overt or covert saccade was detected in any group.
Conclusions:
The statistical differences found in vHIT and fHIT in acquired esotropia patients are thought to be sporadic and based on the results of this study no correction or change in recording technique is required for vHIT or fHIT in children with acquired esotropia.
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