PDF(Pubmed)
Abstract：
To compare changes in the spherical component, regular astigmatism, and irregular astigmatism of the anterior surface of the cornea after small-incision lenticule extraction (SMILE) and transepithelial photorefractive keratectomy (TransPRK). Fifty-six patients underwent SMILE in 56 eyes, and 68 patients underwet TransPRK in 68 eyes. The right eye was chosen to enter the group. Six months after the procedure, Scheimpflug images were acquired, and Fourier analysis of the anterior surface of patients\' corneas was performed using the Pentacam built-in software. Fourier parameters encompass various measurements such as the steepest radius of the curvature and average eccentricity of the spherical components (SphRmin and SphEcc), maximum decentration (MaxDec), central and peripheral regular astigmatism (regular astigmatism at the center [AstC] and regular astigmatism at the periphery [AstP]), and irregularity (Irr). At 6 months postoperatively, SphEcc decreased significantly (P < .001), MaxDec increased significantly (P < .001), and Irr increased insignificantly (P = .254) in the SMILE group. SphEcc decreased significantly (P < .001) and MaxDec and Irr increased significantly (P < .001) in the TransPRK group. TransPRK caused greater changes in SphEcc, MaxDec, and Irr on the anterior corneal surface than SMILE (P < .05). The amount of MaxDec-induced changes in SMILE and TransPRK was significantly correlated with the amount of higher-order aberrations and spherical aberration changes (P < .05). SMILE and TransPRK increase overall irregular astigmatism on the anterior surface of the cornea, more so with TransPRK, where changes in decentration are associated with with increased higher-order aberrations.
摘要：
要比较球形分量的变化，有规律的散光,小切口微透镜摘除（SMILE）和跨上皮屈光性角膜切除术（TransPRK）后角膜前表面的不规则散光。56名患者接受了56只眼睛的微笑，68例患者在68只眼中接受了TransPRK。选择右眼进入该组。手术后六个月，获得了Scheimpflug图像，使用Pentacam内置软件对患者角膜前表面进行傅立叶分析。傅里叶参数包括各种测量，如曲率的最陡半径和球面分量的平均偏心率（SphRmin和SphEcc），最大偏心(MaxDec)，中央和周边规则散光（中心[AstC]的规则散光和周边[AstP]的规则散光），和不规则性（Irr）。术后6个月，SphEcc显著降低(P<.001)，MaxDec显著增加（P<.001），在SMILE组中，Irr增加不明显（P=0.254）。TransPRK组SphEcc显著降低（P<.001），MaxDec和Irr显著升高（P<.001）。TransPRK引起SphEcc更大的变化，MaxDec,角膜前表面的Irr高于SMILE（P<0.05）。MaxDec引起的SMILE和TransPRK变化量与高阶像差和球差变化量显著相关(P<0.05)。SMILE和TransPRK增加了角膜前表面的整体不规则散光，对于TransPRK更是如此，其中，分散度的变化与高阶像差的增加有关。
