Salcan Ilhami, Aykan Umit, Yildirim Ozlem, Kanik Arzu
Department of Ophthalmology, GATA Haydarpasa Training Hospital, Istanbul, Turkey.
Eur J Ophthalmol. 2012 May-Jun;22(3):349-55. doi: 10.5301/ejo.5000013.
To quantify the changes induced by cataract extraction (CE) in angle recess area (ARA), angle opening distance at 250 and 500 µm (AOD250, AOD500), and aqueous depth (AQD) in comparison with axial lens thickness (LT) and to reveal effects of LT and lens position (LP) on angle parameters and AQD using ultrasound biomicroscopy (UBM).
Thirty-five eyes of 35 patients (22 male; mean age 69.5 ± 7.8 years) with senile or presenile cataract who consecutively underwent cataract surgery were enrolled in this institutional study. We performed UBM examinations before and 1 month after surgery under a standard protocol. Axial images of the anterior segment and radial sections of the angle at 4 quadrants were obtained. Aqueous depth and LT were measured in immersion A-scan mode and we used UBM Pro 2000® software for the ARA, AOD250, and AOD500.
Aqueous depth and angle parameters at 4 quadrants were increased significantly after CE (p<0.05). The mean LT was 4.53 ± 0.37 mm and LP was 4.96 ± 0.25 mm preoperatively. There were statistically significant correlations between LT, LP, and AQD and angle parameters preoperatively. We also determined statistically significant correlations between LT, LP, and postoperative changes in AQD and angle parameters In comparison with LT, the mean increases in AQD, ARA, AOD250, and AOD500 were 0.21, 0.014, 0.012, and 0.017 times, respectively.
The results suggest that LT is as a significant factor as LPon the final dimensions of the anterior chamber and angle.
与眼轴晶状体厚度（LT）相比，量化白内障摘除术（CE）引起的房角隐窝面积（ARA）、250和500 µm处的房角开放距离（AOD250、AOD500）及前房深度（AQD）的变化，并使用超声生物显微镜（UBM）揭示LT和晶状体位置（LP）对房角参数及AQD的影响。
本机构研究纳入了35例（22例男性；平均年龄69.5±7.8岁）连续接受白内障手术的老年性或早老性白内障患者的35只眼。我们按照标准方案在手术前和术后1个月进行UBM检查。获取眼前节的轴向图像和4个象限房角的径向截面图像。在浸入式A扫描模式下测量前房深度和LT，并使用UBM Pro 2000®软件测量ARA、AOD250和AOD500。
CE术后4个象限的前房深度和房角参数均显著增加（p<0.05）。术前平均LT为4.53±0.37 mm，LP为4.96±0.25 mm。术前LT、LP与AQD及房角参数之间存在统计学显著相关性。我们还确定了LT、LP与术后AQD及房角参数变化之间的统计学显著相关性。与LT相比，AQD、ARA、AOD250和AOD500的平均增加倍数分别为0.21、0.014、0.012和0.017倍。
结果表明，LT与LP一样，是影响前房和房角最终尺寸的重要因素。
