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KMID : 1159320080100020107
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Korean Journal of Vision Science
2008 Volume.10 No. 2 p.107 ~ p.121
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Myopia Progression of Korean Children Between the Ages of 7 and 11 Years: a Two-year Longitudinal Study
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Kim Jung-Mi
Eom Chang-Deuk
Mah Ki-Choong
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Abstract
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Purpose: To obtain information which can be used for further myopia-preventive research by analyzing changes in refractive error and prevalence of in Korean students as a function of age and gender.
Methods: Cycloplegic autorefraction (Topcon KR 7100-P) were performed three times at 12 month intervals, on 81young students (aged 7 to 11 years) living in Ilsan-city near Seoul.
Results: The prevalence of myopia among the students aged 7 to 11 accounted for 53% and 14% increased further for the later 24 months. The spherical equivalent refractive error became more myopic significantly by -0.79±0.85D. For lower grades of students, the skewness changed from -1.01±0.25 to -1.08±0.25, kurtosis decreased from 1.72±0.49 to 1.31±0.49 and the refractive error changed from 0.09±1.79D to -0.72±2.21D. Forhigher grades of students, skewness changed from -1.02±0.29 to -0.61±0.29, kurtosis decreased from 2.30±0.57 to 0.84±0.57 and the refractive error changed from -1.59±2.20D to -2.35±2.52D. The myopic group showed significantly higher myopic progression than the non-myopic group(p < 0.01).
Conslusions: The prevalence and progression of myopia in Korean children were much higher than those previously report in Western countries. Thus, in order to investigate factor which are influential toward myopia progression, a prospective study with a longer period of observation and larger samples is important for future research.
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KEYWORD
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Myopia, Refractive error, Myopia progression, Prevalence of myopia, Spherical equivalent of refractive error
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