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Clinical evaluation of an eccentric infrared photorefractor: the PowerRefractor by Maths Abrahamsson; Josefin Ohlsson; Maria Björndahl; Hannah Abrahamsson is a Medicine article available to read on EtoBox.

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## Abstract. **Purpose:** **To evaluate the viability of the PowerRefractor as a screening tool for examining refractive errors in large samples of children.** **Methods:** **The variability of the PowerRefractor was estimated using four patients. The refractive error was determined using cyclopentolate and tropicamide as cycloplegic agents and compared to that determined in a non‐cycloplegic situation. In a second study, the data provided by the PowerRefractor were compared to results obtained by autorefractor or retinoscopy for 150 children aged from 6 months to 5 years.** **Results:** **Variability study. Statistical analysis showed a statistically significant difference between cycloplegic and non‐cycloplegic refraction for spherical and cylindrical refractive errors (p < 0.0001 in all cases). There was no significant difference between the measurements made using tropicamide and cyclopentolate (p = 0.33 and p = 0.18, respectively).** **Comparison study. In 142 of 150 patients the difference between data obtained by the PowerRefractor and an autorefractor was within 1 D (spherical equivalent). However, there was a considerable difference between the data generated by the two me

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Author

Maths Abrahamsson; Josefin Ohlsson; Maria Björndahl; Hannah Abrahamsson

Publisher

John Wiley and Sons; Wiley (Blackwell Publishing); Blackwell Publishing Inc.; Wiley (ISSN 1395-3907)

Published

2003

Language

EN

Field

Medicine (Health Sciences)