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KMID : 1159320100120020089
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Korean Journal of Vision Science
2010 Volume.12 No. 2 p.89 ~ p.101
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Comparison of Refractive Components and Their Changes by the Age of Myopia Onset
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Kim Dong-Pil
Lee Kyu-Byung
Kim Hun-Soo
Baik Hang-Woon
Mah Ki-Choong
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Abstract
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Purpose: To find out the cause of myopia by analyzing refractive error and ocular components, and to elucidate aspects affecting refractive error progression according to myopia onset time.
Method: Refractive error, ACD, corneal radius(CR) and axial length(AL) were measured on 152 eyes of 76 college students in 2008 and 2009 under both manifest and cycloplegic condition and if they have -0.50D or more refractive error, the age when they have refractive error correction including contact lenses and spectacles was asked to classify myopia onset time.
Results: Refractive error of EOM(-4.25±2.05D) was higher than that of LOM(-2.63±1.69D) and axial length of EOM(25.464±1.059 mm) was longer than that of LOM(24.850±0.867 mm). -0.08±0.28D myopic shift of EOM and -0.32±0.36D myopic shift of LOM was found. Significant correlations between change in SE and AL(EOM : r = 0.627, p = 0.000, LOM : r = 0.651, p = 0.000) and SE and AL/CR ratio(EOM : r = 0.487, p = 0.000 LOM : r = 0.710, p = 0.000) were found in both groups.
Conclusion: Refractive error of EOM was higher than that of LOM and axial length of EOM was longer than that of LOM. Myopic shift was bigger in LOM.
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KEYWORD
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myopia onset time, change of refractive error, factor of refractive error changes, myopia progression
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