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Temporal Eye-Hand Coordination During Visually Guided Reaching in 7- to 12-Year-Old Children With Strabismus
Krista R Kelly1,2, Dorsa Mir Norouzi1, Mina Nouredanesh3
1Retina Foundation of the Southwest, Dallas, TX, United States.
Investigative Ophthalmology & Visual Science
|November 9, 2022
Summary
Children with strabismus exhibit impaired saccade kinematics during visually guided reaching, indicating difficulties in motor control and coordination. These findings suggest insufficient adaptation or compensatory strategies in treated strabismic children.
Area of Science:
- Ophthalmology
- Neuroscience
- Developmental Pediatrics
Background:
- Strabismus, or eye misalignment, can affect visual development and motor control.
- Previous research indicated slow visually guided reaching in children with strabismus, particularly during the final approach phase.
Purpose of the Study:
- To investigate saccade kinematics and temporal eye-hand coordination during visually guided reaching in children treated for strabismus.
- To compare these parameters between strabismic children and age-similar controls.
Main Methods:
- Thirty children (7-12 years) with esotropia and 32 controls underwent eye movement and index finger movement recordings.
- Participants performed visually guided reaching tasks to a target, with saccade and reach metrics analyzed.
Main Results:
- Strabismic children showed longer saccade latency, reduced primary and final saccade precision, and increased reach-related saccades compared to controls.
- No correlation was found between stereoacuity and impaired saccade kinematics.
Conclusions:
- Strabismus significantly impacts saccade kinematics in children during visually guided reaching.
- Poor binocularity contributes to performance deficits, suggesting incomplete adaptation or compensatory strategies in treated children.
