Chongqing Aier Eye Hospital, No. 2, Huatang Road, Chongqing, China.
West China School of Medicine, Sichuan University, Chengdu, Sichuan, China.
Graefes Arch Clin Exp Ophthalmol. 2022 Aug;260(8):2591-2595. doi: 10.1007/s00417-022-05630-9. Epub 2022 Mar 26.
To compare safety and effectiveness between standard position and adjusted distance pre- and post-anterior capsule of femtosecond laser capsulotomy in white cataracts surgery.
Selected white cataracts that underwent LenSx femtosecond laser capsulotomy were randomized into groups A (standard position, with 300 µm symmetrically pre- and post-anterior capsule), B (increased distance with 400 µm symmetrically pre- and post-anterior capsule), and C (unsymmetrical distances of 200 µm pre- and 400 µm post-anterior capsule, respectively). All these surgeries were performed by the same experienced surgeon. Complications, including incomplete capsulotomy and capsule tears, were recorded. In addition, femtosecond capsulotomy and phacoemulsification parameters, IOLs centrality and corrected distance visual acuity were assessed.
A total of 113 eyes were included in this study. There were 8 (21.6%) incomplete capsulotomy and 1 anterior capsule tear in group A. Meanwhile, only 2 eyes (5.1%) had incomplete capsulotomy with none showing capsule tear in group B. In group C, only 1 eye (2.7%) had incomplete capsulotomy and no capsule tear occurred. Mean femtosecond laser capsulotomy time was longer in group B compared with groups A and C. Average cumulative dispersed energy, IOL centrality and corrected distance visual acuity were similar in all groups.
Appropriate adjustment on femtosecond laser capsulotomy distance by reducing pre-anterior capsule and increasing post-anterior distance, may decrease incomplete capsulotomy and be more effective in white cataracts surgery.
Clinical trial registration number: ChiCTR2100043863.
比较标准位置和调整距离在前囊膜和后囊膜的飞秒激光囊切开术在白内障手术中的安全性和有效性。
选择接受 LenSx 飞秒激光囊切开术的白内障患者，随机分为 A 组（标准位置，前后囊膜对称 300µm）、B 组（增加距离，前后囊膜对称 400µm）和 C 组（前后囊膜分别为 200µm 和 400µm，不对称距离）。所有手术均由同一位经验丰富的外科医生进行。记录并发症，包括不完全囊切开和囊撕裂。此外，评估飞秒囊切开术和超声乳化参数、IOL 中心度和矫正距离视力。
本研究共纳入 113 只眼。A 组有 8 只（21.6%）不完全囊切开和 1 例前囊撕裂。同时，B 组仅有 2 只眼（5.1%）不完全囊切开，无囊撕裂。C 组仅有 1 只眼（2.7%）不完全囊切开，无囊撕裂。B 组飞秒激光囊切开时间较 A 组和 C 组长。各组平均累积分散能量、IOL 中心度和矫正距离视力相似。
适当调整飞秒激光囊切开术距离，减少前囊膜，增加后囊膜距离，可减少不完全囊切开，在白内障手术中更有效。
临床试验注册号：ChiCTR2100043863。
