Purpose. To investigate the effect of the degree of astigmatism on optical quality in children. The important objective evaluation parameters we focus on include the RMS of the high-order aberrations, MTF, and PSF. Methods. The children, age ranging from 7 to 10 years old, underwent an optometry examination. Fifty-nine children who met the inclusion criteria were divided into three groups: A (1.0 D ≤ astigmatism < 2.0 D), B (2.0 D ≤ astigmatism < 3.0 D), and C (3.0 D ≤ astigmatism < 4.0 D). The OPD-SCAN-III aberrometer was used to measure PSF, MTF, and other optical parameters. Total higher-order aberrations, total coma aberrations, total spherical aberrations, and total trefoil aberrations corresponding to the RMS value, the AR value of MTF, and the SR value of PSF with a 4 mm pupil diameter were assessed. Results. RMS-HO, RMS-T.Coma, RMS-T.Tre, and RMS-T.Sph in the three groups were significantly increased with increasing the degree of astigmatism, while there were no significant differences in RMS-T.Sph between the groups. The AR value and the SR value decreased with increasing degree of astigmatism, and there were significant differences in the AR value and the SR value. Conclusion. Astigmatism has a significant influence on the higher-order aberrations, MTF, and PSF in the children. The effect of astigmatism value on the optical quality is mainly reflected in the change in these three parameters.

中文翻译：

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散光度数对儿童光学质量的影响。


目的。探讨散光度数对儿童光学质量的影响。我们关注的重要客观评价参数包括高阶像差的RMS、MTF和PSF。方法。这些孩子的年龄从7岁到10岁不等，接受了验光检查。符合纳入标准的 59 名儿童被分为三组：A（1.0 D ≤ 散光 < 2.0 D）、B（2.0 D ≤ 散光 < 3.0 D）和 C（3.0 D ≤ 散光 < 4.0 D） ）。 OPD-SCAN-III像差仪用于测量PSF、MTF和其他光学参数。评估与4mm瞳孔直径的RMS值、MTF的AR值和PSF的SR值对应的总高阶像差、总彗形像差、总球面像差和总三叶形像差。结果。三组的RMS-HO、RMS-T.Coma、RMS-T.Tre、RMS-T.Sph均随着散光度数的增加而显着增加，而RMS-T.Sph则无显着性差异。组。 AR值和SR值随着散光度数的增加而降低，且AR值和SR值存在显着差异。结论。散光对儿童的高阶像差、MTF、PSF有显着影响。像散值对光学质量的影响主要体现在这三个参数的变化上。