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KMID : 1159320200220030325
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Korean Journal of Vision Science
2020 Volume.22 No. 3 p.325 ~ p.334
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Analysis of Corneal Asphericity according to Age and Gender
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An Young-Ju
Kim Jung-Hee
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Abstract
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Purpose : The purpose of this study was to investigate the distribution of corneal asphericity of all ages in Koreans and changes in corneal asphericity according to age and gender.
Methods : A total of 317 people(317 eyes) were analyzed retrospectively. The refractive error was analyzed by the autorefractometer. The corneal asphericity and curvature were measured in the central 6 mm zone of the cornea and analyzed by a rotating scheimplug camera.
Results : The anterior and posterior corneal Q-values were -0.17±0.18(ranged -0.84 to 0.72) and -0.11±0.29(ranged -0.89 to 1.27), respectively. As the age group increased, the anterior corneal Q-value did not show a significant difference(p=0.359), while the posterior corneal Q-value showed statistically significant differences of 0.01±0.18, 0.10±0.29, -0.12±0.22, -0.20± 0.25, -0.27±0.20 and ?0.33±0.31 in the 30s, 40s, 50s, 60s, 70s and over 80’s, respectively(p＜0.001). The posterior corneal Q-value was negatively correlated with the age(r=-0.480, p＜0.001).
Conclusion : The anterior corneal Q-value did not show a significant difference in gender and age while the posterior corneal Q-value changed from oblate to prolate shape as the age increased.
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KEYWORD
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Corneal asphericity, Eccentricity, Keratometry, Q-value
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