CASIA2与IOL Master 700测量白内障患者角膜屈光力及散光的差异性和一致性

目的:比较CASIA2与IOL Master 700测量年龄相关性白内障患者角膜屈光力和散光的差异性和一致性。方法:回顾性研究。选取2021-11/12在我院就诊的年龄相关性白内障患者153例232眼。分别采用CASIA2和IOL Master 700测量白内障患者角膜前、后表面及全角膜的平坦轴角膜曲率(Kf)、陡峭轴角膜曲率(Ks)、平均角膜曲率(Km)、散光度数及轴向(矢量表示法J₀和J₄₅)。分析两种仪器测量参数的差异性、相关性及一致性。结果:CASIA2与IOL Master 700测量角膜后表面J₄₅值无差异(-0.006±0.038D vs-0.005±0.044D,P>0.05),其余参数均有差异(均P<0.05);两种仪器测量角膜前后表面及全角膜屈光力和散光均呈显著正相关(均r/r_s>0.7,P<0.001);Bland-Altman分析法显示角膜前表面屈光力及散光一致性较好，后表面及全角膜屈光力一致性较差。结论:CASIA2与IOL Master 700测量...

Difference and consistency of corneal refractive power and astigmatism in cataract patients measured by CASIA2 and IOL Master 700

AIM: To compare the difference and consistency of corneal refractive power and astigmatism measured by CASIA2 and IOL Master 700 in patients with age-related cataract.

METHODS: Retrospective study. A total of 153 patients(232 eyes)with age-related cataract admitted to Daping hospital from November to December 2021 were selected. The flat keratometry(Kf), steep keratometry(Ks), mean keratometry(Km), degree and axis of astigmatism(vector representation J₀ and J₄₅)of the anterior, posterior surfaces together with the total cornea from cataract patients were measured by CASIA2 and IOL Master 700, respectively. The difference, correlation and consistency of the two instruments were analyzed.

RESULTS:There was no significant difference in J₄₅ values of posterior corneal surface measured by CASIA2 and IOL Master 700(-0.006±0.038D vs. -0.005±0.044D, P>0.05), but there were significant differences in other parameters(all P<0.05). All parameters measured by the two instruments were significantly positive correlated(all r/r_s>0.7, P<0.001); Bland-Altman analysis showed that the refractive power and astigmatism of the anterior cornea surface measured by the two facilities were in good consistency, while the refractive power of the posterior surface and the whole cornea showed poor consistency.

CONCLUSION: CASIA2 and IOL Master 700 showed little differences and good consistency in the refractive power and astigmatism of the anterior, posterior and total corneal surface in cataract patients, which seems interchangeable. However, the refractive power of the posterior surface and the whole cornea has significant differences and poor consistency, which should not be interchange casually.