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KMID : 1159320140160020141
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Korean Journal of Vision Science
2014 Volume.16 No. 2 p.141 ~ p.148
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Comparison between Manifest Refraction and Cycloplegic Refraction of elementary school the lower grades and the upper grades
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Na Hun-Taek
Joung Maeng-Sig
Kim Hong-Seon
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Abstract
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Purpose: For this study, the elementary school students compared manifest refraction and cycloplegic refraction, and investigate difference between the lower grades and the upper grades.
Methods: Myopia in the lower grades (grade 1.2.3) 91 people(182eyes), the upper grades (Grades 4.5.6) 58 people(116eyes), 298 eyes of total the change of refractive error for noncycloplegic and cycloplegic were measured using autofractometer and retinoscope.
Results: The spherical refraction of noncycloplegic and cycloplegic measured -1.23 ± 0.80D and -1.08 ± 0.83D, respectively, myopia of cycloplegic refraction was lower than manifest refraction by 0.16 ± 0.24D (t = -2.182 p <0.05). Cylinder refraction of noncycloplegic and cycloplegic measured -0.70 ± 0.56D and 0.59 ± 0.60D, astigmatism of cycloplegic refraction ? was lower than manifest refraction by 0.11 ± 0.14D (t=-1.329 p<0.19). The lower grades, each -1.22 ± 0.63D, -1.07 ± 0.72D of myopia is also a cycloplegic refraction was lower than manifest refraction by 0.16 ± 0.26D (t =
-2.004 p <0.05), the upper grades, each -1.23 ± 0.98D, -1.09 ± 0.96D cycloplegic refraction was lower than manifest refraction by 0.15 ± 0.19 (t = -1.121 p <0.27).
Conclusions: The results compared of elementary school students manifest refraction and cycloplegic refraction was significant difference on spherical refraction, but manifest refraction and cycloplegic refraction of low myopia lower grades and upper grades there were hardly any differences in the amount of reduction.
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KEYWORD
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Manifest Refraction, Cycloplegic Refraction, elementary school students, grades
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