Preoperative and postoperative size and movements of the lens capsular bag: Ultrasound biomicroscopy analysis
Preoperative and postoperative size and movements of the lens capsular bag: Ultrasound biomicroscopy analysis
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DOI：
10.1016/j.jcrs.2011.04.035
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发表时间：
2011-10-01
影响因子：
2.8
通讯作者：
Sourdille, Philippe
中科院分区：
文献类型：
--
作者：
Modesti, Marina;Pasqualitto, Giacomo;Sourdille, Philippe
目的：使用超声生物显微镜 (UBM) 和眼前段光学相干断层扫描 (AS-OCT) 评估白内障手术前后囊袋大小和调节运动。地点：意大利罗马 Fabia Mater 诊所眼科单位。设计：队列研究。方法：使用 UBM 对接受白内障手术和单焦点人工晶状体 (IOL) 植入的眼睛进行研究。术前和术后 1、2 和 12 个月测量以下参数：前房深度 (ACD)（也通过 AS-OCT）、囊袋厚度、囊袋直径、睫状环直径、沟至沟 (STS) 直径、睫状突 - 囊袋距离、睫状体尖 - 囊袋平面和 IOL 倾斜。术前和术后12个月时计算囊袋体积。将结果与调节期间的变化进行比较。结果：该研究包括 24 只眼睛。除了术后未修改的睫状尖-囊袋平面外，所有测量参数在人工晶状体植入后均显示出显着变化。只有ACD在调节过程中没有明显变化。结论：白内障手术后，由于适应植入的IOL，囊袋水平拉伸，垂直直径减小。囊袋-IOL复合体填充了所有可用空间，压缩小带纤维并几乎消除了睫状体顶端和囊袋之间的空间。前房加深，睫状环直径和 STS 直径减小。在没有小带纤维张力的情况下，睫状突的形状可能会改变。
PURPOSE: To evaluate capsular bag size and accommodative movement before and after cataract surgery using ultrasound biomicroscopy (UBM) and anterior segment optical coherence tomography (AS-OCT).SETTING: Ophthalmology Unit, Fabia Mater Clinic, Rome, Italy.DESIGN: Cohort study.METHODS: Eyes having cataract surgery and monofocal intraocular lens (IOL) implantation were studied using UBM. The following parameters were measured preoperatively and 1, 2, and 12 months postoperatively: anterior chamber depth (ACD) (also by AS-OCT), capsular bag thickness, capsular bag diameter, ciliary ring diameter, sulcus-to-sulcus (STS) diameter, ciliary process-capsular bag distance, ciliary apex-capsular bag plane, and IOL tilting. The preoperative and postoperative capsular bag volumes were calculated at 12 months. The results were compared with the changes during accommodation.RESULTS: The study comprised 24 eyes. With the exception of the ciliary apex-capsular bag plane, which appeared to be unmodified postoperatively, all measured parameters showed significant variation after IOL implantation. Only the ACD did not change significantly during accommodation.CONCLUSIONS: After cataract surgery, the capsular bag stretched horizontally and with reduced vertical diameter as a result of adaptation to the implanted IOL. The capsular bag-IOL complex filled all available space, compressing the zonular fibers and almost abolishing the space between the ciliary apex and the capsular bag. There was anterior chamber deepening and a decrease in the ciliary ring diameter and STS diameter. In the absence of zonular fiber tension, the shape of the ciliary processes may be modified.