Feng Liying, Vidal Carmen Canovas, Weeber Henk, Koopman Bram, Sajadi Shima Bahramizadeh, Rozema Jos J
Johnson & Johnson Surgical Vision, Groningen, The Netherlands.
Visual Optics Lab Antwerp (VOLANTIS), Faculty of Medicine and Health Sciences, University of Antwerp, Antwerp, Belgium.
Sci Rep. 2024 Dec 28;14(1):31132. doi: 10.1038/s41598-024-82377-9.
In cataract surgery, post-surgical stability of the intraocular lens plays a major role. This study aims to explore how the size and decentration of the capsulorhexis affect intraocular lens decentration and tilt by using numerical methods. Finite element models included zonules, ciliary body, capsular bag, and an IOL with two open-loop haptics were built. Capsulorhexes were modeled with a 4.5- and 5.5-mm diameter. The capsulorhexis was shifted 0.5-1 mm in two in-plane directions normal to the optical axis. Three IOLs with different powers (5 D, 29 D, and 34 D) were compared. The results were also compared with currently published numerical and clinical studies. With different capsulorhexes sizes and locations, the decentration varied from 0.43 to 8.3 μm, and the tilt varied 0.02° - 0.09°. The 34 D lens had the largest tilt and decentration when capsulorhexis changed sizes or decentered. The simulation showed that capsulorhexis size and decentration have only a minor effect on IOL decentration or tilt that will in most cases not be noticeable to the patient.
在白内障手术中，人工晶状体的术后稳定性起着重要作用。本研究旨在通过数值方法探讨撕囊口的大小和偏心对人工晶状体偏心和倾斜的影响。构建了包括悬韧带、睫状体、囊袋以及带有两个开环袢的人工晶状体的有限元模型。对直径为4.5毫米和5.5毫米的撕囊口进行建模。撕囊口在垂直于光轴的两个平面方向上偏移0.5 - 1毫米。比较了三种不同屈光度（5D、29D和34D）的人工晶状体。还将结果与当前发表的数值研究和临床研究进行了比较。随着撕囊口大小和位置的不同，偏心度在0.43至8.3微米之间变化，倾斜度在0.02°至0.09°之间变化。当撕囊口大小改变或偏心时，34D的晶状体具有最大的倾斜度和偏心度。模拟结果表明，撕囊口大小和偏心对人工晶状体的偏心或倾斜影响较小，在大多数情况下患者不会察觉到。
