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KMID : 1159320180200030259
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Korean Journal of Vision Science
2018 Volume.20 No. 3 p.259 ~ p.267
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Comparison between Manifest and Cycloplegic Refraction of Hyperopic elementary School Students
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Na Hun-Taek
Joung Maeng-Sig
Kim Hong-Seon
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Abstract
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Purpose : The purpose of this study was to apply as the basic data on hyperopic refractive error through comparison and analysis of manifest refreaction (MR) and cycloplegic refraction (CR) in elementary school students with hyperopia in gangwon-do region.
Methods : Total of 50 eyes; 30 eyes of lower grades (grade 1.2.3) 20 eyes of the upper grades (Grades 4.5.6) participated , and were divided into 2 groups such as the mild hyperopia (+0.25D ~ +2.00D), moderate hyperopia (+2.25D ~+5.00D). MR and CR were performed with auto-refractometer and retinoscope.
Results : The mean values of spherical power of MR and CR were +1.00±0.52D and +1.59±1.23D respectively, and that of CR power was 0.59±0.59D (p<0.05). In the lower grades, there were +0.91±0.52D and +1.44±1.25D, respectively, showing that CR was also higher than manifest refraction by 0.53±0.59D. In the upper grades, as the lower grade groupthere were +1.14±0.51D and +1.80±1.18D, respectively, showing that CR was also higher than MR by 0.66±0.58D (p<0.05). The differences between MR and CR according to the degree of hyperopia were 0.48D and 1.75D, respectively in mild and moderate hyperopic groups.
Conclusions : It was found a significant difference in the spherical power between the whole students and the lower and upper grades in the hyperopic elementary school students. It was verified that the difference of spherical power between mild and moderate hyperopia were also increased as the refractive powers increased in comparison of the degree of hyperopia.
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KEYWORD
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Elementary school student , Hyperopic , Manifest , Cycloplegic Refraction
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