目的：分析iTrace像差仪与三维眼前节分析系统Pentacam测量角膜球面像差及曲率的差异性和一致性。

方法：选取2018-08/2019-02在我院拟行激光角膜屈光手术的屈光不正患者63例125眼，分别使用iTrace像差仪与三维眼前节分析系统Pentacam进行角膜球面像差和曲率的测量，比较两种仪器检测结果的差异性和一致性。

结果：iTrace像差仪测得角膜球面像差、最平坦曲率径线、最陡峭曲率径线、角膜散光值分别为0.230±0.086μm、43.01±2.38D、44.08±2.48D、1.03±0.57D，Pentacam测得结果分别为0.247±0.114μm、42.88±1.44D、43.86±1.51D、1.07±0.62D，均无明显差异(P>0.05)，且两种仪器测得结果的差值的均数均接近基线(0)，95%一致性区间窄，一致性较好。

结论：iTrace像差仪和三维眼前节分析系统Pentacam测量的角膜球面像差和曲率无明显差异，且一致性较好，临床中可相互参考。

METHODS: The corneal spherical aberration and curvature were measured by iTrace and Pentacam in 63 cases(125 eyes)separately, and the SphA, the minimum corneal curvature(K1), maximum corneal curvature(K2)and corneal astigmatism(CA)were recorded respectively. Paired t-test was used for statistical analysis of econometric data, Bland-Altman analysis was used to evaluate the consistency of measurement results(SphA and curvature)measured by iTrace and Pentacam.

RESULTS: The measurement result of SphA, K1, K2 and CA were(0.230±0.086)μm,(43.01±2.38)D,(44.08±2.48)D and(1.03±0.57)D measured by iTrace, and(0.247±0.114)μm,(42.88±1.44)D,(43.86±1.51)D and(1.07±0.62)D measured by Pentacam, there was no significant difference of the measurement result of SphA, K1, K2 and CA between iTrace and Pentacam(P>0.05). The difference of SphA, K1, K2 and CA between iTrace and Pentacam was close to 0, the consistency was good because of the narrow 95% confidence interval.

CONCLUSION:There is no significant difference of the measurement result between iTrace and Pentacam, the consistency is good, and both can be used as a mutual reference in clinical.