Visual outcome and rotational stability of open loop toric intraocular lens implantation in Indian eyes

Purpose:

To assess the visual outcome and rotational stability of single-piece open loop toric Intra Ocular Lens (IOL) in a clinical setting.

Materials and Methods:

In a prospective study, 122 eyes of 77 patients were followed up for a period of 12 months after cataract surgery with toric open loop IOL implantation. The pre-operative markings for the position of incision and IOL placement were done under slit lamp by anterior stromal puncture. The visual acuity, refraction, and IOL position were assessed at day 1, 1 week, 1 month, 3 months, 6 months, and 12 months after surgery.

Results:

The mean age of the cohort was 56 yrs (S.D. 13.88; range 16 to 87 years). The mean pre-operative cylinder of corneal astigmatism was 1.37 D. (SD 0.79, range 1.0 to 5.87 D). Mean post-operative refractive cylinder was 0.36 D (SD 0.57, range 0 to 1.50 D) at 12 months. Ninety-seven percent of the eyes were within 1 D of residual astigmatism. Ninety-four percent of patients had uncorrected visual acuity of 20/30 or better. Four eyes required IOL repositioning due to rotation. At 12 months, 96.7% of the IOLs were within 10 degrees of the target axis. There was no rotation seen after 6 months.

Conclusion:

Toric IOLs are very effective and consistent in correcting astigmatism during the cataract surgery. IOL rotation happens mostly within a month of surgery, and if significant, requires early repositioning.     

LRG1 promotes epithelial-mesenchymal transition of retinal pigment epithelium cells by activating NOX4

AIM:To investigate the effect of leucine-rich-alpha-2-glycoprotein 1(LRG1)on epithelial-mesenchymal transition(EMT)in retinal pigment epithelium(RPE)cells,and to explore the role of NADPH oxidase 4(NOX4).METHODS:RPE cells(ARPE-19 cell line)were treated with transforming growth factor-β1(TGF-β1)to induce EMT.Changes of the m RNA and protein expression levels of LRG1 were tested in the TGF-β1 treated cells.The recombinant human LRG1 protein(r LRG1)and si RNA of LRG1 were used to establish accumulation of exogenous LRG1 model and the down-regulation of LRG1 model in ARPE-19 cells respectively,and to detect EMT-related markers including fibronectin,α-smooth muscle actin(α-SMA)and zonula occludens-1(ZO-1).The m RNA and protein expression level of NOX4 were measured according to the above treatments.VAS2870 was used as a NOX4 inhibitor in r LRG1-treated cells.EMT-related markers were detected to verify the effect of NOX4 in the process of EMT.RESULTS:TGF-β1 promoted the expression of LRG1 at both the m RNA and protein levels during the process of EMT which showed the up-regulation of fibronectin andα-SMA,as well as the down-regulation of ZO-1.Furthermore,the r LRG1 promoted EMT of ARPE-19 cells,which manifested high levels of fibronectin andα-SMA and low level of ZO-1,whereas knockdown of LRG1 prevented EMT by decreasing the expressions of fibronectin andα-SMA and increasing the expression of ZO-1 in ARPE-19 cells.Besides,the r LRG1 activated and LRG1 si RNA suppressed NOX4 expression.EMT was inhibited when VAS2870 was used in the r LRG1-treated cells.CONCLUSION:These results for the first time demonstrate that LRG1 promotes EMT of RPE cells by activating NOX4,which may provide a novel direction to explore the mechanisms of subretinal fibrosis.     

囊袋张力环在高度近视眼后发性白内障手术中的应用

目的探讨囊袋张力环(capsular tension ring,CTR)在高度近视眼后发性白内障手术中的应用效果。方法选择2009年6月至2011年12月我院高度近视眼后发性白内障患者320例(545眼),均为晶状体屈光术后患者,随机分为对照组156例(270眼)和观察组164例(275眼)。对照组采用常规超声乳化白内障摘出联合人工晶状体植入术,观察组在对照组手术基础上植入CTR。术后随访18个月,观察两组患者术中、术后并发症的发生情况,同时记录末次随访时视力、眼压的变化以及白内障的复发情况。结果对照组术前视力为0.23±0.09,术后为0.37±0.10;观察组术前视力为0.25±0.08,术后为0.45±0.09;2组患者术后视力均较术前提高,与术前比较,差异均有统计学意义(均为P<0.05);2组术后视力比较,观察组好于对照组,差异有统计学意义(P<0.05)。2组患者术后眼压均较术前降低,与术前比较,差异均有统计学意义(均为P<0.05);2组术后眼压比较,观察组低于对照组,差异有统计学意义(P<0.05)。2组白内障复发率、并发症发生率差异均有统计学意义(均为P<0.05)。结论 CTR作为新型的白内障手术辅助材料,能够有效地提高高度近视眼后发性白内障手术的治疗效果。     

高度近视散光的白内障复曲面(toric)人工晶状体及囊袋张力环植入术的效果观察

目的:观察有角膜散光的高度近视伴白内障患者进行超声乳化复曲面人工晶状体(toric IOL)及囊袋张力环植入术的临床效果及人工晶状体旋转稳定性。方法:回顾性研究。上海新视界眼科医院2016年11月至2020年3月角膜规则散光>1.50 D的高度近视伴白内障21例(31眼),行超声乳化toric IOL及囊袋张力环植入术...     

超声乳化联合囊袋张力环及人工晶状体植入术治疗高度近视合并白内障

目的：观察超声乳化联合囊袋张力环及人工晶状体植入术治疗高度近视合并白内障患者的疗效。

方法：回顾性研究。选取2021-12/2023-04我院白内障科收治的高度近视合并白内障患者82例82眼，根据术中是否使用囊袋张力环分为两组：对照组39眼采用单纯超声乳化联合人工晶状体植入术治疗，联合组43眼采用超声乳化联合囊袋张力环及人工晶状体植入术治疗。比较两组患者手术前后最佳矫正视力、中央前房深度、小梁睫状突距离、视觉质量和并发症。

结果：术后1mo，两组患者的最佳矫正视力(LogMAR)较术前明显改善(联合组：0.64±0.28 vs 0.12±0.14； 对照组：0.62±0.26 vs 0.23±0.25，均P<0.001)； 中央前房深度均高于术前(联合组：2.57±0.56 vs 1.97±0.40 mm； 对照组：2.22±0.45 vs 1.89±0.37 mm，均P<0.001)，联合组最佳矫正视力和中央前房深度优于对照组(均P<0.05)； 两组患者手术前后小梁睫状突距离比较均无差异(联合组：0.68±0.22 vs 0.74±0.20 mm； 对照组：0.74±0.19 vs 0.78±0.17 mm，均P>0.05)。术后1 mo视觉质量评分联合组均高于对照组\〖看电视3.00±0.38 vs 2.22±0.46分； 看书2.85±0.42 vs 2.21±0.44分； 夜间视物：2.71±0.34 vs 2.37±0.41分； 精细操作2.82±0.38 vs 2.33±0.40分，均P<0.001)。联合组并发症发生率显著低于对照组(33% vs 14%，P<0.05)。

结论：超声乳化联合囊袋张力环及人工晶状体植入术治疗高度近视合并白内障患者能有效促进患者视功能恢复，改善房角结构，降低并发症发生率。     

Combined special capsular tension ring and toric IOL implantation for management of post-DALK high regular astigmatism with subluxated traumatic cataract

We report a case of 18-year-old male who has undergone phacoemulsification with implantation of toric IOL (AcrySof IQ SN6AT9) after fixation of lens capsule with Cionni''s capsular tension ring (CTR) for subluxated traumatic cataract with high astigmatism after deep anterior lamellar keratoplasty (DALK). He underwent right eye DALK for advanced keratoconus four years earlier. He had history of trauma one year later with displaced clear crystalline lens into anterior chamber and graft dehiscence, which was repaired successfully. The graft survived, but patient developed cataract with subluxated lens, for which phacoemulsification with implantation of toric IOL was done. Serial topography showed regular corneal astigmatism of -5.50 diopter (K₁ 42.75 D @130°, K₂ 48.25 D @40°). At 10-month follow-up, the patient has BCVA 20/30 with + 0.75 DS/- 1.75 DC @ 110°. The capsular bag is quite stable with well-centered IOL. Combination of Cionni''s ring with toric IOL could be a good option to manage such complex cases.     

Influence of capsular tension ring on posterior capsule opacification in myopic eyes

Purpose:

To determine the effect of a capsular tension ring (CTR) implantation in preventing posterior capsular opacification (PCO) after cataract surgery in patients with high myopia.

Materials and Methods:

In this prospective single-surgeon standardized-surgical-procedure fellow-eye comparison trial, 34 patients with high myopia had phacoemulsification surgery. Although one eye received an acrylic intraocular lens (IOL) and CTR, other eye received only an IOL as control. PCO, within the capsulorhexis overlap, was documented by standardized digital retroillumination images at least 2 years post-operatively, and the percentage area of PCO was scored (scale 0%-100%) using the POCOman software system. The PCO score and the incidence of neodymium-doped yttrium aluminum garnet (Nd: YAG) capsulotomy of groups, and correlations between PCO score and presence of CTR, age, phaco time, refraction, and axial length (AL) were determined.

Results:

The mean time interval from surgery to PCO measurement was 43.4 ± 11.2 months for the eyes with a CTR and 43.1 ± 11.6 months for the controls (P = 0.91). The PCO score of the eyes with a CTR was significantly lower than in the controls (5.9 ± 4.3 vs. 22.3 ± 12.2, respectively; P < 0.001). There were statistically insignificant correlations between PCO score and pre-operative refraction (r = 0.02; P = 0.90), AL (r = 0.03; P = 0.80), phaco time (r = 0.11; P = 0.53), and patient''s age (r = 0.23; P = 0.55). No patient with a CTR had a Nd: YAG laser capsulotomy, but it was six in controls (P = 0.025).

Conclusions:

CTR implantation seems to be effective in reducing the PCO and Nd: YAG laser capsulotomy rates in high myopic eyes.     

Trifocal toric intraocular lenses in eyes with low amount of corneal astigmatism

AIM: To evaluate the refractive and visual outcomes following cataract surgery and implantation of a trifocal toric intraocular lens (IOL) in eyes with low degrees of corneal astigmatism. METHODS: Twenty six eyes of 22 patients who underwent implantation a trifocal toric IOL (FineVision PODFT, PhysIOL s.a., Liege, Belgium) were enrolled. Phacoemulsification with femtosecond laser, capsular tension ring insertion and intraoperative aberrometry were performed in all cases. All IOLs used showed a cylinder power of 1.00 D. Main outcome measures were refractive error and corrected distance visual acuity (CDVA) and uncorrected distance visual acuity (UDVA) values. Eyes were evaluated at 4mo post-surgery. RESULTS: Totally 50% of eyes showed a spherical equivalent (SE) within ±0.13 D and all of them within ±0.50 D. The mean SE and refractive cylinder were -0.02±0.23 and -0.16±0.22 D, respectively. Vector analysis revealed that 100% of eyes were within ±0.50 D for the SE and cylindrical components (J0 and J45). Refractive changes were not correlated with keratometric changes (P>0.05) showing that the reduction in astigmatism comes from the trifocal toric IOL. Of 81% and 96% of eyes showed UDVA and CDVA of 20/20, respectively. The postoperative mean values of monocular distance Snellen decimal UDVA and CDVA were 0.97±0.05 and 0.99±0.02 (about 20/20), respectively. CONCLUSIONS: The present study suggests that the use of this trifocal toric IOL in patients with low amount of astigmatism provides accurate refractive outcomes and enables them to achieve excellent visual acuity.     

国产囊袋张力环用于白内障手术维持囊袋张力的有效性和安全性的多中心临床研究

目的 评价CTR型国产囊袋张力环用于白内障手术维持囊袋张力的临床有效性和安全性。 设计 多中心、随机、开放、阳性产品、平行对照设计。 研究对象 年龄＞18岁,核硬度为1~3级且术中需要维持囊袋张力的白内障患者119例。 方法 受试者随机分配入试验组（59例）和对照组（60例）,行白内障超声乳化术及囊袋张力环、人工晶状体植入术,试验组植入CTR型国产囊袋张力环（爱博诺德（北京）医疗科技股份有限公司,中国）,对照组植入TENSIOBAG型囊袋张力环（卡尔蔡司医疗技术有限公司,德国）。于术后1~2天,1周,1、3、6个月和1年及以上进行随访评估。采用t检验、Wilcoxon秩和检验、卡方检验、CMH卡方检验、精确概率检验、确切概率法等方法进行统计学分析,比较两组的有效性和安全性。 主要指标 矫正及裸眼远视力、屈光度、人工晶状体偏心及囊膜收缩情况、角膜内皮细胞密度。结果 术后各随访期,两组术眼最佳矫正远视力、裸眼远视力组间均无统计学差异（P均＞0.05）,相对于基线期的变化值均无统计学差异（P均＞0.05）;术后6个月及1年时,两组术眼屈光度均无统计学差异（P均＞0.05）,相对于基线期的变化值均无统计学差异（P均＞0.05）。试验组术后1~2天,1周,1、3个月、1年及以上随访时均未发现人工晶状体偏心,6个月随访时发现1例稍偏位但1年及以上随访时已居中;对照组术后各随访期未发现人工晶状体偏心,两组无统计学差异（P均＞0.05）。两组受试者各随访期均未发现囊膜收缩。在安全性方面,两组受试者在术后各随访时间点,裂隙灯检查结果均无统计学差异（P均＞0.05）,均未发现瞳孔阻滞现象,眼压无统计学差异（P均＞0.05）;术后1年及以上随访时,两组角膜内皮细胞密度无统计学差异（P均＞0.05）。 结论 国产CTR型囊袋张力环（爱博诺德（北京）医疗科技股份有限公司,中国）用于白内障手术维持囊袋张力的有效性和安全性与TENSIOBAG型囊袋张力环（卡尔蔡司医疗技术有限公司,德国）相当。     

Toric人工晶状体矫正角膜散光的效果评价

目的评价Toric人工晶状体（IOL）矫正角膜散光的效果及在囊袋内的稳定性。方法收集确诊为年龄相关性白内障并伴有角膜规则散光的患者32例（35眼）,采用白内障超声乳化法植入ToricIOL。观察术前、术后裸眼视力（UCVA）及最佳矫正视力（BCVA）、术前角膜散光、预计残余散光、术后残余散光、IOL旋转度,并进行分析。结果术后3个月92%患眼UCVA≥0.5,78%患眼UCVA≥0.8,BCVA≥0.8者达96%。术前角膜散光平均为（1.500±0.405）D,术后3个月残余散光为（0.200±0.179）D。3个月时与术后第1d轴位相比较,IOL旋转平均为（2.132±1.853）°。结论ToricIOL可使患者获得更好的裸眼远视力,减少了患者的残余散光,预测性强,具有良好的旋转稳定性,是一种有效的矫正角膜规则散光的治疗方法。     

高度角膜散光白内障患者植入Toric IOL的临床观察

目的:评估高度角膜散光患者植入高度数环曲面人工晶状体（AcrySof Toric intraocular lens,Toric IOL）术后的视力和屈光结果。 方法:对21例24眼高度角膜散光的白内障患者行回顾性系列研究,术前角膜散光≥2.5D,植入AcrySof Toric IOL(T6,T7,T8或者T9)。研究数据包括术前和术后3mo的裸眼远视力（uncorrected distance visual acuities,UCDVA）、最佳矫正远视力（best-corrected distance visual acuities,BCDVA）、术前角膜散光、术后残留散光和散光轴向的偏离情况。 结果:术后3mo的UCDVA中75%（18/24）患眼视力＞05,显著高于术前BCDVA,两组差异有统计学意义（χ2=50.12,P<0.05）。术前角膜散光是3.45±0.63D。术后3mo残留的散光是0.72±0.23D。两者差异具有统计学意义（t=0.128,P＜0.01）。术后67%（16/24）的眼残留散光＜0.75D,83%（20/24）的眼＜1.00D。术前预计矫正散光312±0.54D,术后实际矫正散光3.05±0.66D,两者差异无统计学意义（t=1.659,P＞0.05）。人工晶状体术后3mo和1wk之间的旋转度数是3.2°±2.1°。 结论:植入高度数Toric IOL是一种安全的、有效的和可预测的治疗白内障合并高度角膜散光的方法。     

Toric人工晶状体植入矫正角膜散光的疗效观察

目的：观察Toric人工晶状体(intraocular lens, IOL)植入用于治疗合并角膜散光的白内障患者的临床治疗效果。

方法：对41例47眼合并角膜散光的白内障患者行超声乳化白内障吸出及IOL植入术治疗,进行回顾性分析。其中22眼植入Toric IOL,25眼植入Acrysof IQ IOL。术后随访6mo,分析不同时间点裸眼视力、术后残余散光、并发症等,比较两种IOL的疗效。观察Toric IOL植入后的稳定性。

结果： 术后随访观察6mo,植入Toric IOL的试验组,术后裸眼视力平均0.73±0.37,明显优于植入Acrysof IQ IOL的对照组(平均0.47±0.18),结果有显著性差异。试验组术后裸眼视力0.5以上者占81.8%,优于对照组32.0%。试验组患者术后残余散光0.53±0.40D,明显低于对照组(2.13±0.76D),差异有统计学意义。植入Toric IOL组,随访6mo,术后平均旋转4.22±1.46度。

结论：对于合并角膜散光的白内障患者,行白内障超声乳化吸出联合Toric IOL植入,能够安全、有效的改善患者的散光,提高术后视觉质量,预测性好。     

Toric人工晶状体植入矫正老年性白内障合并角膜散光的疗效

目的：探讨老年性白内障合并角膜散光行超声乳化摘除联合Toric人工晶状体植入的临床效果,比较Acrysof Toric人工晶状体植入前后的视觉质量。

方法：选择老年性白内障合并角膜散光的患者34例为研究对象,进行白内障超声乳化摘除联合Toric人工晶状体植入,观察术前和术后3mo的临床效果,包括裸眼视力(UCVA),最佳矫正视力(BCVA),全眼残余散光,人工晶状体转动度数,视远脱镜情况。

结果：所有患者Toric人工晶状体均成功植入。术前UCVA 0.15±0.06,术后UCVA上升至0.65±0.15(P<0.01); 术前BCVA 0.37±0.13,术后BCVA上升至0.85±0.19(P<0.01); 全眼散光由术前2.14±0.69D降低至0.73±0.36D(P<0.01),97%的患者人工晶状体转位<5°,平均旋转2.6°±1.3°,术后3mo视远脱镜率达95%。

结论：Toric人工晶状体能够有效矫正白内障合并的角膜散光,晶状体在囊袋内具有良好的稳定性,提高了患者的术后视觉质量。     

晶状体囊袋张力环在预防后囊膜混浊中的应用

后囊膜混浊是白内障摘出联合后房型人工晶状体植入术后导致视力下降的最常见并发症之一 ,而术中植入囊袋张力环可有效地降低后囊膜混浊的发生 ,我们就囊袋张力环在白内障术中的应用及发展情况加以综述     

囊袋张力环对高度近视患者白内障术后疗效影响的荟萃分析

目的 基于荟萃分析评价术中联合植入囊袋张力环(CTR)对高度近视患者白内障手术疗效的影响。方法 全面检索PubMed、Embase、Web of Science、The Cochrane Library、中国知网、万方、维普等7个数据库,检索时间范围为1990年1月1日至2022年3月20日,收集CTR在高度近视患者白内障手术中应用的随机对照试验和非随机对照试验。2名研究人员根据纳入和排除标准,独立检索文献、提取数据及进行方法学质量评价,采用Review Manager 5.4进行荟萃分析。结果 最终纳入8篇文献,共涉及1292例(1630眼)患者。荟萃分析结果显示,在改善患者最佳矫正视力(BCVA)方面,术后1个月、3个月、6个月CTR联合人工晶状体(IOL)植入组患者的BCVA均显著优于IOL植入组(均为P<0.05);在IOL倾斜角、偏心量方面,术后6个月时CTR联合IOL植入组患者较IOL植入组均显著降低(均为P<0.05);晶状体前囊口面积方面,术后3个月时CTR联合IOL植入组患者大于IOL植入组(P=0.048);术后PCO发生率方面,CTR联合IOL植入组患...     

Comparison of trifocal toric and bifocal toric intraocular lens implantation in patients with cataract and high corneal astigmatism

AIM: To investigate and compare the quality of life, satisfaction, contrast sensitivity, glare, depth perception, and intraocular lens (IOL) rotation in patients who underwent trifocal toric and bifocal toric IOLs. METHODS: A total of 80 eyes of 40 patients were included in this prospective study. Twenty patients in each group were implanted with trifocal toric and bifocal toric IOL, respectively. Preoperative and postoperative 6-month measurements were recorded for both patient groups. Comprehensive anterior and posterior segment examinations, distance-intermediate-near visual acuity values and the visual function scale questionnaire results were evaluated at these examinations. Patient satisfaction, contrast sensitivity, glare, intermediate-near and distance stereopsis and IOL rotation were also evaluated. RESULTS: No significant difference was found between the groups in terms of distance and near visual acuities (P=0.269, P=0.451). Intermediate visual acuity was significantly increased in the trifocal toric group (P<0.001). The visual function scale results were increased after surgery in both groups (P=0.001 and P<0.001), with no difference determined between them (P=0.158 and P=0.691). The number of patients wearing glasses was low in both groups and there was no significant difference between the groups (P>0.05). The overall satisfaction in the trifocal toric group was significantly higher than in the bifocal toric group (P=0.03). The highest sensitivity was observed at 6 cpd spatial frequency in all patients under photopic conditions (1.80±0.24 logU, 1.74±0.20 logU). Distance-intermediate-near binocular depth perception results in both groups were higher in the trifocal toric group (P=0.02, 0.048, 0.003, respectively). Although there was no significant difference for 3 meters stereopsis, the trifocal toric group had higher depth perception (P=0.577). Mean rotation was 5.76°±3.93° in the trifocal toric group and 12°±7.1° in the bifocal toric group. CONCLUSION: Better results in the middle distance are obtained in the trifocal toric group and less IOL rotation due to digital system-coordinated surgery. Moreover, the overall satisfaction in the trifocal toric group is significantly higher than in the bifocal toric group.     

囊袋张力环在晶状体半脱位白内障超声乳化手术中的应用

目的:评价晶状体囊袋张力环(capsular tension ring,CTR)在晶状体半脱位白内障超声乳化手术中的应用效果。方法:对13例(13眼)合并晶状体半脱位的白内障患者行白内障手术,术中连续环形撕囊后植入CTR,然后行超声乳化及后房型折叠人工晶状体囊袋内植入。结果:13眼的人工晶状体均处于正位,无明显偏位及倾斜。术后矫正视力>0.8者4眼;0.4~0.7者8眼;0.1者1眼,为老年性白内障合并黄斑区脉络膜新生血管患者,未见由CTR引起的并发症。结论:在超声乳化治疗晶状体脱位的白内障手术中运用CTR,能提高手术安全性,防止人工晶状体偏位,减少手术并发症,是一种良好的白内障手术辅助工具。     

超声乳化白内障摘出联合CTR植入治疗高度近视并发白内障

目的：探究超声乳化白内障摘出联合囊袋张力环(CTR)植入治疗高度近视并发白内障患者的疗效,并分析其安全性。

方法：回顾性分析我院186例186眼行超声乳化白内障摘出+人工晶状体(IOL)植入治疗的高度近视并发白内障患者临床资料,其中98例98眼联合CTR植入治疗(联合组),88例88眼未联合CTR植入治疗(对照组)。记录两组术前,术后1、3、6mo时最佳矫正视力(BCVA, LogMAR)、视觉质量\〖高阶像差的均方根值(RMS)\〗、角膜内皮细胞密度,评估术后1、3、6mo时前囊口面积、IOL倾斜角变化情况,并比较两组术后前囊膜混浊、后囊膜混浊、囊袋收缩综合征等并发症发生情况差异。

结果：两组BCVA具有交互效应(P<0.05),两组术后BCVA值均较术前降低(P<0.05),且联合组术后BCVA值均低于对照组(P<0.05)。两组总高阶像差RMS具有交互效应(P<0.05),两组术后总高阶像差RMS均较术前升高(P<0.05),且联合组术后总高阶像差RMS均低于对照组(P<0.05)。两组术后前囊口面积具有交互效应(P<0.05),组内均随术后时间的延长而降低(P<0.05),且联合组术后3、6mo时均高于对照组(P<0.05)。两组术后IOL倾斜角具有交互效应(P<0.05),组内均随术后时间的延长而升高(P<0.05),且联合组术后3、6mo时均低于对照组(P<0.05)。两组术后角膜内皮细胞密度均较术前降低(P<0.05),但并无交互效应(P>0.05)。

结论：超声乳化白内障摘出+IOL植入+CTR植入术可改善高度近视并发白内障患者视觉功能,术后并发症少,疗效及安全性良好。     

Stability of neodymium:YAG laser posterior capsulotomy in eyes with capsular tension rings

AIM: To evaluate the stability of neodymium (Nd):YAG laser posterior capsulotomy in eyes with capsular tension rings (CTRs).METHODS: A total of 60 eyes that underwent cataract surgery and laser posterior capsulotomy postoperatively were included in this retrospective cohort study. To evaluate the safety and stability of capsulotomy, changes in the size of posterior capsulotomy and anterior chamber depth (ACD) in three groups: the group without CTR, the group with 12 mm CTRs, and the group with 13 mm CTRs, at 1wk, 3, 12, and 15mo after capsulotomy, were compared.RESULTS: In the group without CTR and the group with 12 mm CTR, there was no significant change in ACD at every post-laser follow-up. In the group with 13 mm CTR, the ACD change was significant until 3mo after capsulotomy. In all groups, there was a significant increase in the area of capsulotomy between 1wk and 3mo post-laser. Between 3 and 12mo post-laser, only the group with 13 mm CTR showed a significant increase in the area of capsulotomy (P<0.01).CONCLUSION: Laser posterior capsulotomy is safe in all three groups. The capsulotomy and ACD become stabilized and have not shown significant changes since 1y post-laser, even with larger CTRs. The maintenance of centrifugal capsular tension can last longer with larger CTRs, and the stability of the capsulotomy site can be reached about 12mo after capsulotomy in pseudophakic eyes with larger CTRs.     

囊袋弯曲结构对后囊混浊影响的研究新进展

近10～15a内,随着超乳手术和植入技术的快速发展,白内障手术的成功率大大提高,手术并发症明显减少,但后囊混浊(posterior capsular opacification,PCO)仍然是一个严重的长期并发症.防治PCO已成为目前致力于白内障治疗研究的眼科专业人员不懈努力的目标.目前,通过人工晶状体(intraocular lens,IOL)设计的革新,以减少白内障超乳联合人工晶状体植入手术后后囊混浊的研究是令人瞩目的,并已经取得一些进展,这主要表现在新的人工晶状体设计改善了囊袋弯曲结构的品质.视将对目前正在进行的关于囊袋弯曲结构对后囊混浊影响的研究的一些进展进行综述,并通过探索一些有助于建立囊袋弯曲的冈素来帮助眼科医生了解PCO防治的进展.