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KMID : 1011420100150010099
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Journal of Korean Ophthalmic Optics Society
2010 Volume.15 No. 1 p.99 ~ p.104
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Comparison of Autorefraction and Refraction with iTrace for Elementary School Children
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Kim Hyo-Jin
Lee Koon-Ja
Kim Sam-Yi
Kim Se-Rom
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Abstract
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Purpose: Difference of refraction result from the method of autorefraction and iTrace were investigaged for the children of elementary school in Asan City. In iTrace method, exclusion of accommodation without cycloplegia was used.
Methods: Manifest refractive state of 42 eyes of 12~13 years old were measured using autorefractor and iTrace. Refractions of far (more than 5 m) and near (30 cm) vision were measured using iTrace. All data showed that the spherical equivalent were classified as being in the group 1 (-0.50D<~<+1.00D) and 2 (below -0.50D) according to refractive errors.
Results: Mean spherical equivalent using autorefractor and iTrace (far and near vision) were -1.08D, -0.29D and -2.34D, respectively (p<0.001). Compared with the far vision using iTrace, autorefraction was measured the myopia with -0.50D~-1.00D in 52.4% of total eyes. Autorefraction also statistical significant were measured a more myopia than the far vision using iTrace in group 1 and 2.
Conclusions: The difference of refractive errors between autorefraction and iTrace, objective refraction were measured with far vision of more than 5 m were -0.79D. Autoreftaction showed statistically decreased refraction errors than iTrace with far vision.
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KEYWORD
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iTrace, Myopia, Autorefractor, Cycloplegia, Elementary School children, itrace
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