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Clinical evaluation of an eccentric infrared photorefractor: the PowerRefractor
Maths Abrahamsson1, Josefin Ohlsson, Maria Björndahl
1Department of Ophthalmology, Institute of Clinical Neuroscience, Göteborg University, Mölndal, Sweden.
Acta Ophthalmologica Scandinavica
|December 4, 2003
Summary
The PowerRefractor is a reliable tool for screening refractive errors in young children. Its ease of use and ability to examine both eyes simultaneously make it ideal for large-scale pediatric studies.
Area of Science:
- Ophthalmology
- Pediatric Optometry
Background:
- Refractive errors are common in children.
- Accurate screening is crucial for early detection and intervention.
- Existing methods may have limitations in large-scale pediatric populations.
Purpose of the Study:
- To assess the PowerRefractor's viability as a screening tool for refractive errors.
- To evaluate its performance in large pediatric samples.
Main Methods:
- Variability of the PowerRefractor assessed in four patients.
- Refractive error determined with and without cycloplegic agents (cyclopentolate, tropicamide).
- Comparison of PowerRefractor data with autorefractor/retinoscopy in 150 children (6 months–5 years).
Main Results:
- Significant differences found between cycloplegic and non-cycloplegic refraction (p<0.0001).
- No significant difference between tropicamide and cyclopentolate cycloplegic agents.
- PowerRefractor data within 1 D of autorefractor in 142/150 children; significant differences in 8 patients (up to 16 D).
Conclusions:
- The PowerRefractor is a reliable tool for estimating refractive errors in young children.
- Its ease of handling and simultaneous bilateral eye examination are advantageous for large-scale studies.