超声生物显微镜在有晶状体眼后房型人工晶状体植入术中的应用

目的 研究传统测量角膜水平直径方法和超声生物显微镜(ultrasound biomicroscopy,UBM)方法测量睫状沟水平直径来选择后房型人工晶状体(implantable collamer lenses,ICL)的长度,比较两种方法对有晶状体眼ICL术后拱高的影响.方法 回顾性研究2009年5月至2010年12月在我科行ICL植入手术的103例(191眼)近视散光患者,根据术前选择ICL长度的不同分为常规方法组和UBM方法组,分剐测量两组术后6个月的ICL拱高,并对数据进行比较和相关性分析.结果 术前两组一般资料比较差异均无统计学意义(均为P＞0.05).术后6个月常规方法纽ICL平均拱高为(444.63±202.00)μm,UBM方法组为(463.67±226.00)μm,两组比较差异无统计学意义(P=0.094);拱高在理想范围(250～750μm)者,常规方法组占76.1％(70眼),UBM组占77.8％(77眼),两组差异无统计学意义(x2=0.0769,P=0.782);常规方法组ICL拱高和ICL度数相关系数r1=0.002(P1=0.677),UBM组ICL拱高和ICL度数的相关系数r2=0.011(P2=0.349),两组拱高均和ICL度数不相关.结论 在现有检查设备的条件下,通过UBM测量睫状沟的水平距离能够选择更理想的ICL,通过传统方法测量角膜水平直径(白到白的距离)来估算ICL的长度也是可行的.

Application of ultrasound biomicroscope in posterior chamber intraocular lens implantation of phakic eye

Objective To compare the conventional white to white method with ultrasound biomicroscopic (UBM) method in estimating the sulcus-to-sulcus horizontal diameter for implantable collamer lens (ICL) length determination to ICL vault.Methods This study was retrospective research.A total of 113 patients (191 eyes) undergoing ICL implantation were examined from May 2009 to December 2012.All patients were divided into two group,conventional group and UBM group.The central vault of ICL was assessed quantitatively at 6 months after surgery and the results were compared between the two groups.The relation between the ICL vault and ICL power was also investigated.Results There was no statistical difference in general information of patients between two groups (all P>0.05).The central vault at 6 months after surgery was (444.63±202.00)μm in conventional group and( 463.67±226.00)μm in UBM group,and there was no statistical difference between two groups (P=0.094).The patients with ideal ICL vault from 250 μm to 750μm was 70 eyes(76.1%)in conventional group and 77 eyes(77.8%)in UBM group,and there was no statistical difference between two groups(χ2=0.0769,P=0.782).The ICL vault was not correlated with ICL power in two groups(r=0.002,0.011;P=0.677,0.349).Conclusion The UBM method is the best methods in terms of predicting the sulcus-to-sulcus horizontal diameter for ICL length determination.But in some hospital without UBM equipment,the conventional white to white method could be an alternative method for predicting the sulcus-to-sulcus horizontal diameter for ICL length determination.