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KMID : 1011420140190020199
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Journal of Korean Ophthalmic Optics Society
2014 Volume.19 No. 2 p.199 ~ p.206
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Correlations between Higher-order Aberrations and Myopic Degree
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Ryu Nam-Yul
Kim So-Ra
Park Mi-Jung
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Abstract
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Purpose: The present study was aimed to investigate the correlation between higher-order aberration and myopic degree by the analysis of fluctuation of high-order aberration according to the change of myopic degree in certain ranges of myopia and astigmatism.
Methods: The high-order aberration in a total of 992 eyes was analyzed by using a LADARWave device employing Hartmann-Shack system, and the relation between high-order aberration and myopia by the change of myopic degree through manifest refraction test.
Results: In all subjects, spherical aberration and total coma aberration were significantly increased by the increase of myopic degree, however, trefoil aberration and astigmatic aberration and tetrafoil aberration were decreased. With the group of lower myopic degree, the change of coma aberration was greater by myopic degree and its change was significantly different. The change of spherical aberration by myopic degree was greatly large in the a group of ?3.00 D or
more and the group of ?6.00 D or more where as its change was not large in the group of lower than ?3.00 D. The significant decrease of coma aberration was observed only in the group of astigmatic degree of ?1.00 D or less when analyzing the correlation between the higher-order aberrations and myopia in the certain groups of astigmatic degree. In the case of spherical aberration, the significant change was shown in all astigmatic groups, however, its increase was larger with the increase of myopic degree in lower degree of astigmatism. The consistent relationship in variations of horizontal and vertical coma aberration in certain myopic and astigmatic groups was neither established nor statistically significant.
Conclusions: It is concluded that the correlation between the higher-order aberration and low-order aberration obtained from the results of the present study can help the understanding related to vision quality and the improvement of vision quality.
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KEYWORD
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Hartmann-Shack, Higher-order aberration, Spherical aberration, Coma aberration, Myopic degree, Astigmatic degree
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