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[Examination of preschool children for refractive errors. First experience using a handheld autorefractor]
T F Büchner1, U Schnorbus, U H Grenzebach
1Klinik und Poliklinik für Augenheilkunde, Uniklinikum Münster, buechnet@mednet.uni-muenster.de
Summary
A new handheld autorefractor shows promise for preschool vision screening, offering comparable accuracy to traditional methods for astigmatism and axis measurement. This device facilitates effective refractive screening in young children.
Area of Science:
- Ophthalmology
- Pediatric Optometry
- Vision Science
Background:
- Refractive errors are a leading cause of amblyopia, necessitating refractive screening in preschool children.
- Cooperation can be a challenge when using traditional tabletop autorefractor devices with this age group.
Purpose of the Study:
- To evaluate the efficacy and accuracy of a novel handheld autorefractor for vision screening in kindergarten settings.
- To assess the device's usability and cooperation rates among young children.
Main Methods:
- A handheld autorefractor (SureSight, Welch Allyn) was used to examine 216 children aged 3.5-4.5 years without cycloplegia.
- Reproducibility of readings was assessed, and autorefractor results were compared with cycloplegic retinoscopy for a subset of eyes.
Main Results:
- The device detected mild hyperopia and astigmatism, with higher reproducibility for cylinder power and axis than spherical equivalent.
- Comparison with cycloplegic retinoscopy showed comparable accuracy for cylinder power and axis, with limitations for spherical equivalent.
- An exceptionally high cooperation rate (99.5%) was observed among the children.
Conclusions:
- The handheld autorefractor demonstrates accuracy for cylinder power and axis measurement comparable to conventional devices, making it suitable for preschool screening.
- High cooperation rates indicate the instrument's utility in pediatric vision screening programs.
- Further studies are needed to establish validity and threshold values for detecting relevant refractive abnormalities.