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KMID : 1011420100150020123
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Journal of Korean Ophthalmic Optics Society
2010 Volume.15 No. 2 p.123 ~ p.130
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Comparison of Noncycloplegic Autorefraction, Manifest Refraction and Cycloplegic Autorefraction in School-aged Children
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Kim Dae-Young
Lee Koon-Ja
Baarg Sang-Bai
Kim Hyo-Jin
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Abstract
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Purpose: The study was conducted to compare the values of auto-refraction, manifest refraction and cycloplegic refraction in school-aged children.
Methods: One hundred five myopic school children ranged from 6 to 14 years old (210 eyes, 10.28?1.59 years old) were recruited and noncycloplegic auto-refraction (AR) and manifest refraction (MR) were conducted and then underwent cycloplegia and refractive status (CR) again with the auto-refractometer.
Results: Refractive powers measured by AR, MR, and CR were highly correlated. However, spherical and cylindrical powers of the subjects measured by AR were measured higher negative power than in CR (p<0.001). From 210 eyes, the discrepancy rate in the spherical and cylindrical powers were 40 eyes (19%) and 19 eyes (9%) of the total subjects, respectively and the differences between noncycloplegic and cycloplegic refractions were higher with the spherical and cylindrical powers increasing.
Conclusions: The use of the autorefractometer in children with negative spherical power without cycloplegia may overestimate the actual myopia that subjective refraction is the most important in prescription for the eyeglasses and regression equations would be used to prognose the cycloplegic refraction from the auto-refraction as the basic data for the subjective refraction.
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KEYWORD
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Myopia, Noncycloplegic autorefraction, Retinoscopy, Cycloplegic autorefraction
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