目的：探讨年龄相关性白内障患者应用新型扫频源光学相干断层扫描仪(SS-OCT)与Scheimpflug眼前节分析仪测量角膜屈光力、角膜散光的Bland-Altman分析。

方法：选取2021-01/12我院收治的年龄相关性白内障患者177例282眼。分别采用SS-OCT与Scheimpflug眼前节分析仪测量角膜前表面、后表面、全角膜的陡峭轴屈光力(Ks)、平坦轴屈光力(Kf)、平均角膜屈光力(Km)、角膜散光、散光轴向。所有参数进行配对样本t检验、组内重复性检验、Pearson相关性和Bland-Altman一致性分析。

结果：SS-OCT与Scheimpflug眼前节分析仪测量的角膜前表面屈光力Ks、Kf、Km均无差异(P>0.05)。Scheimpflug眼前节分析仪测量的角膜后表面以及全角膜屈光力Ks、Kf、Km均大于SS-OCT测量值(P<0.05)。SS-OCT与Scheimpflug眼前节分析仪测量的角膜前表面、角膜后表面以及全角膜的散光度数和轴向均无差异(P>0.05)。所有参数的组内相关系数(ICC)均大于0.88，提示组内重复性较好。SS-OCT与Scheimpflug眼前节分析仪测量的角膜前表面、角膜后表面以及全角膜的Ks、Kf、Km、散光度数和轴向均呈正相关(P<0.05)。Bland-Altman一致性分析显示，SS-OCT与Scheimpflug眼前节分析仪测量的角膜前表面、角膜后表面以及全角膜的Ks、Kf、Km、散光度数和轴向的一致性较好(P<0.05)。

结论：新型SS-OCT与Scheimpflug眼前节分析仪测量的角膜屈光力、角膜散光参数具有高度一致性，可适用于年龄相关性白内障患者角膜屈光力及角膜散光的诊断。

METHODS: A total of 177 patients(282 eyes)with age-related cataract admitted to the hospital between January and December 2021 were enrolled. The steep-axis curvature(Ks), flat-axis curvature(Kf), mean corneal curvature(Km), corneal astigmatism and astigmatism axis of anterior corneal surface, posterior surface and the whole cornea were measured by SS-OCT and Scheimpflug anterior segment analyzer respectively. All parameters were detected by paired sample t-test, intra-group repeatability test, Pearson correlation and Bland-Altman consistency analysis.

RESULTS: There was no significant difference in Ks, Kf and Km of anterior corneal surface measured by SS-OCT and Scheimpflug anterior segment analyzer(P>0.05). Ks, Kf and Km of posterior corneal surface and whole cornea measured by Scheimpflug anterior segment analyzer were all greater than those measured by SS-OCT(P<0.05). There was no significant difference in astigmatism and axial values of anterior corneal surface, posterior surface and whole cornea measured by SS-OCT and Scheimpflug anterior segment analyzer(P>0.05). The intraclass correlation coefficient(ICC)of all parameters was greater than 0.88, indicating a good intra-group repeatability. Ks, Kf, Km, astigmatism and axis of anterior corneal surface, posterior surface and whole cornea measured by SS-OCT were positively correlated with those measured by Scheimpflug anterior segment analyzer(P<0.05). Bland-Altman consistency analysis showed that Ks, Kf, Km, corneal astigmatism and axis of anterior corneal surface, posterior surface and whole cornea measured by SS-OCT were highly consistent with those measured by Scheimpflug anterior segment analyzer(P<0.05).

CONCLUSION: The corneal curvature and astigmatism parameters measured by new SS-OCT are highly consistent with those measured by Scheimpflug anterior segment analyzer, which can be applied in the diagnosis of corneal curvature and astigmatism in patients with age-related cataract.