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目的:比较IOLMaster与接触式A超测量中央前房深度和眼轴长度的差异,以评价两者在人工晶状体度数计算参数测量中的准确性。方法:2006-10/2007-01在我院眼科施行白内障超声乳化摘除手术联合人工晶状体植入的患者121例(137眼),分别用IOLMaster与接触式A超于术前测量中央前房深度和眼轴长度。结果:IOLMaster与接触式A超测量中央前房深度分别为(2.94±0.49)mm,(2.58±0.51)mm,配对t检验,两者的差值为(0.36±0.30)mm(P<0.001),差异有显著性,相关系数r=0.823(P<0.001)。测量眼轴长度分别为(24.37±3.04)mm,(23.81±2.83)mm,配对t检验,两者差值为(0.56±0.34)mm(P<0.001),差异有显著性,相关系数r=0.996(P<0.001)。结论:IOLMaster与接触式A超均可用于前房深度和眼轴长度的测量,两者的相关性好。但基于光学原理的IOLMaster在准确测量眼轴长度和前房深度的同时,简便、快捷、非接触的特点是A超无法比拟的,并可同时测量出其他相关参数。
OBJECTIVE: To compare the difference of anterior chamber depth and axial length between IOLMaster and contact A-ultrasound to evaluate the accuracy of the two parameters in the measurement of intraocular lens power. METHODS: From October 2006 to January 2007, 121 patients (137 eyes) with cataract phacoemulsification and intraocular lens implantation underwent ophthalmology in our hospital. The central anterior chamber depth Axis length. Results: The depths of the central anterior chamber measured by IOLMaster and contact A ultrasonography were (2.94 ± 0.49) mm and (2.58 ± 0.51) mm, respectively. The differences between the two methods were (0.36 ± 0.30) mm (P <0.001) , The difference was significant, the correlation coefficient r = 0.823 (P <0.001). The length of axial length was (24.37 ± 3.04) mm and (23.81 ± 2.83) mm, respectively. Paired t test showed that the difference between them was (0.56 ± 0.34) mm (P <0.001) 0.996 (P <0.001). Conclusion: Both IOLMaster and contact A ultrasonography can be used for the measurement of anterior chamber depth and axial length, and the correlation between them is good. However, based on the principle of optics, IOLMaster is an easy, fast and non-contact feature that can not be compared with A-ray and can simultaneously measure other relevant parameters while accurately measuring axial length and anterior chamber depth.