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Effective and Efficient Stand Magnifier Use in Visually Impaired Children
Joyce Liebrand-Schurink1, Ralf F A Cox2, Ger H M B van Rens3
1Behavioural Science Institute, Radboud UniversityNijmegen, Netherlands; Bartiméus Institute for the Visually ImpairedZeist, Netherlands; Expertise Center Health, Social Care and Technology, Saxion University of Applied SciencesEnschede, Netherlands.
Children with visual impairment effectively use stand magnifiers for tasks. Despite differences in strategy, visually impaired children performed comparably to sighted children in accuracy and speed.
Area of Science:
- Ophthalmology
- Developmental Psychology
- Human Factors Engineering
Background:
- Evaluating assistive technology for children with visual impairment.
- Assessing early low vision aid (LVA) adoption in pediatric populations.
Purpose of the Study:
- To analyze the effectiveness and efficiency of stand magnifier use in children with visual impairment.
- To compare performance in a goal-directed perceptuomotor task between visually impaired and normally sighted children.
Main Methods:
- Twenty-nine visually impaired and 47 normally sighted children (4-8 years) participated.
- Task involved moving a stand magnifier to identify and compare symbols.
- Performance metrics included accuracy, response time, identification time, and movement time.
Main Results:
- No significant differences in accuracy, reaction time, or movement time between groups.
- Visually impaired children showed less variability in viewing distance.
- Visually impaired children used a consistent, preferred-hand/eye strategy.
Conclusions:
- Children with visual impairment can adequately and efficiently use stand magnifiers.
- Visually impaired children exhibit a less adaptive, standardized strategy compared to normally sighted children.
- Age-related development in visual-perceptual tasks is observed in normally sighted children but not in the visually impaired group.
