健常眼の高次波面収差の定量解析

Quantitative analysis of higher-order wavefront aberrations in normal eyes

要約　目的：健常な眼球の光学系全体，すなわち全屈折の波面収差の定量的解析。対象と方法：屈折異常以外に異常がない90名115眼の全屈折を波面収差測定装置で測定し，装置に内蔵のZernikeの多項式に展開し算出した。収差，屈折度，5mmと7mmの瞳孔径による値を検討項目とした。結果：各次数が収差の総和に占める割合は，2次85.8％，3次8.1％，4次4.4％，5次1.7％であった。屈折度数と高次収差の間に相関はなかった（Spearmanの順位相関：r＝0.042，p＝0.742）。収差は瞳孔径5mmよりも7mmで有意に大きかった（Wilcoxon符号順位検定：p＜0.01）。結論：高次収差は屈折度とは相関せず，瞳孔径が大きいとき高次収差が増大した。

Abstract.　Purpose：To quantitate total wavefront aberrations in normal eyes. Cases and Method：A total of 115 eyes of 90 normal persons were evaluated for total refraction by a wavefront analyzer. They were free of eye disorders except anomalous refraction. The data were evolved into Zernike polinomials. Evaluated were：wavefront aberration,refraction,and values at the pupil diameter of 5 mm and 7 mm. Results：The total aberration was composed of 85.8％ second-order,8.1％ of third-order,4.4％ of fourth-order,and 1.7％ of fifth-order one. There was no correlation between refraction and higher-order aberrations（Spearman rank correlation coefficient：r＝0.042,p＝0.742）. The aberrations were significantly greater at the pupil size of 7 mm than 5 mm（Wilcoxon signed rank test：p＜0.01）. Conclusion：Higher-order wavefront aberrations did not correlate with refraction. They increased in larger pupils.