In-the-bag scleral suturing of intraocular lens in eyes with severe zonular dehiscence

Purpose

To compare the degree of tilt and decentration of an intraocular lens (IOL), refractive status, and prediction error between eyes that underwent trans-scleral suturing of the IOL within the capsular bag (in-the-bag scleral suturing) and eyes that underwent scleral suturing outside of the bag (out-of-the-bag scleral suturing) because of severe zonular dehiscence.

Patients and methods

Thirty eyes that underwent in-the-bag scleral suturing of an IOL and 38 eyes that underwent out-of-the-bag scleral suturing were recruited sequentially. The tilt and decentration of the IOL, anterior chamber depth, manifest refractive spherical equivalent (MRSE), prediction error, and incidence of complications were examined.

Results

The mean tilt angle and the decentration length of the IOL of the in-the-bag suturing group were significantly less than those of the out-of-the-bag suturing group (P=0.0003 in tilt and P=0.0391 in decentration), although the anterior chamber depth was similar. The mean MRSE and prediction error of the in-the-bag suturing group were less than those of the out-of-the-bag suturing group (P=0.0006 in MRSE and P=0.0034 in error). The incidence of vitreous loss was less in the in-the-bag suturing group than in the out-of-the-bag suturing group (20% vs63.2%, P=0.0009).

Conclusions

The tilt and decentration of the IOL after in-the-bag scleral suturing are significantly less than those after out-of-the-bag scleral suturing, which may lead to less MRSE and less prediction error. As the incidence of vitreous loss is less after in-the-bag scleral suturing, in-the-bag suturing is advantageous for eyes of younger patients and of less complicated cases.     

Comparison of the stability of 1-piece and 3-piece acrylic intraocular lenses in the lens capsule

PURPOSE: To compare the degrees of intraocular lens (IOL) decentration, tilt, and longitudinal movement; the refractive change; and anterior capsule contraction after cataract surgery between eyes with a 1-piece acrylic IOL with soft acrylic loops and eyes with a 3-piece acrylic IOL with rigid poly(methyl methacrylate) loops. SETTING: Hayashi Eye Hospital, Fukuoka, Japan. METHODS: Fifty-six patients had implantation of a 1-piece acrylic IOL in 1 eye and a 3-piece acrylic IOL in the fellow eye. The degree of IOL decentration and tilt, the anterior chamber depth (ACD), and the area of anterior capsule opening were measured using Scheimpflug videophotography 3 days and 1, 3, and 6 months postoperatively. The postoperative refractive status was also examined. RESULTS: The mean degrees of decentration and tilt in the 1-piece IOL group were similar to those in the 3-piece IOL group throughout the follow-up. The ACD did not change after surgery in the 1-piece group but showed significant shallowing in the 3-piece group (P < .0001). The spherical equivalent (SE) did not change in the 1-piece group, while the SE had a significant myopic shift of approximately 0.4 diopter in the 3-piece group. The percentage of anterior capsule contraction was similar between the groups. CONCLUSIONS: The degree of IOL decentration and tilt and percentage of anterior capsule contraction in eyes with a 1-piece acrylic IOL with soft acrylic loops were similar to those in eyes with a 3-piece acrylic IOL. The longitudinal movement of the 1-piece IOL was less than the movement of the 3-piece IOL, resulting in less postoperative myopic shift.     

Anterior capsule contraction and intraocular lens dislocation in eyes with pseudoexfoliation syndrome

AIMS—To examine the extent of anterior capsule contraction as well as intraocular lens (IOL) decentration and tilt following implant surgery in eyes with pseudoexfoliation syndrome (PE).
METHODS—53 eyes from 53 patients with PE and 53 control eyes from 53 age matched patients, undergoing phacoemulsification and implant surgery, were recruited. The anterior capsule opening area and the amounts of IOL decentration and tilt after undergoing continuous curvilinear capsulorhexis were measured using the Scheimpflug videophotography system at 1 week and 1, 3, 6, 9, and 12 months postoperatively.
RESULTS—The mean area of the anterior capsule opening in the PE group was significantly smaller than that in the control group at 1 month postoperatively and later. The percentage reductions in the PE group were approximately 25%, while they were less than 10% in the control group. The degree of IOL tilt was also larger in the PE group than in the control group. Five eyes (9.4%) in the PE group underwent a neodymium:YAG laser anterior capsulotomy, but none in the control group underwent a capsulotomy.
CONCLUSIONS—The contraction of the anterior capsule opening was more extensive in the PE eyes than in the control eyes, thus resulting in a high Nd:YAG laser anterior capsulotomy rate. The IOL tilt was also greater in the PE eyes than in the control eyes.

Keywords: anterior capsule contraction; intraocular lens dislocation; pseudoexfoliation syndrome; continuous curvilinear capsulorhexis     

囊袋张力环植入治疗晶状体悬韧带异常的2年临床效果

目的评价在晶状体悬韧带异常情况下行超声乳化白内障吸除术时植入囊袋张力环（CTR）来提供晶状体囊袋支持的中长期临床效果。方法对2003年1月至2004年7月期间因晶状体悬韧带松弛或部分断裂或合并白内障在我院行超声乳化白内障吸除及CTR和人工晶状体（IOL）植入术的19例患者（22只眼）进行为期2年的随访。随访指标为最佳矫正视力和屈光度数、眼压、CTR和IOL及囊袋复合体的位置、晶状体后囊膜混浊（PCO）和晶状体囊袋的收缩程度。应用眼前节成像系统Pentacam采集各眼的Scheimpflug图像,分析术后1、6、12和24个月IOL的偏心值与倾斜度。结果术后2年随访结果：末次随访最佳矫正视力较术前提高≥2行者20只眼（90.9％）,提高1行者2只眼（9．1％）。CTR位置：21只眼CTR位于囊袋内,1只眼CTR部分脱出于囊袋外。IOL位置：22只眼的IOL均位于囊袋内,术后1个月1只眼轻度偏中心,术后2年5只眼轻度偏中心。PCO情况：末次随访3只眼（13．6％）因重度PCO行掺钇钕石榴石激光后囊膜切开,余19只眼为轻度PCO,无需处理。晶状体囊袋收缩程度：末次随访1只眼囊袋中度收缩。Pantacam检查术后1、6、12和24个月IOL的平均偏心值分别为（0．393±0．094）、（0.406±0．094）、（0.415±0．093）、（0.463±0．172）mm,术后1、6与24个月比较,差异有统计学意义（P〈0．05）。倾斜度分别为2．637°±0．369°、2．653°±0．349°、2．682°±0.348°、2．714°±0．360°,各组间差异无统计学意义（P=0.220）。结论CTR合并IOL植入治疗晶状体悬韧带异常可获得良好视力。术后2年的随访观察证实CTR的植入抑制了PCO和囊袋收缩的发生,并维持IOL在囊袋内位置的良好稳定性。（中华眼科杂志,2007．43：519-524）     

白内障术后晶状体前囊膜收缩对人工晶状体偏心的影响

目的：评价白内障术后晶状体前囊膜收缩对人工晶状体偏心的影响。

方法：选取40例40眼年龄相关性白内障患者行白内障超声乳化吸除联合人工晶状体植入术,术后使用Photoshop软件测量术后3mo内的晶状体前囊膜口面积,使用iTrace视觉质量分析仪测量人工晶状体偏心距离,采用Pearson相关性分析晶状体前囊膜收缩对人工晶状体偏心的影响。

结果：术后1d,1、3mo,前囊膜口面积逐渐缩小(P<0.01); IOL偏心逐渐增大(P<0.01); 患者的裸眼视力逐渐下降(P<0.01)。前囊膜口面积变化量与IOL偏心量呈正相关(r=0.566,P<0.05),术后患者的裸眼视力与IOL偏心量无明显相关(r=-0.104,P>0.05),前囊膜口面积变化量与初始面积呈负相关(r=-0.476,P<0.05)。

结论：白内障术后晶状体前囊膜的收缩可导致IOL偏心。     

Management of large traumatic zonular dialysis with phacoemulsification and IOL implantation using the capsular tension ring

PURPOSE: To report our results and to evaluate the longterm effect of capsular tension ring (CTR) insertion in eyes with large traumatic zonular dialysis that underwent phacoemulsification with posterior chamber (PC) intraocular lens (IOL) implantation. METHODS: This prospective study included 17 eyes of 17 consecutive patients with cataract and large traumatic zonular dialysis (range 80-160 degrees determined pre-or intraoperatively). After insertion of a CTR, phacoemulsification with foldable acrylic PC IOL implantation was performed. Posterior capsule rupture, vitreous loss, best corrected visual acuity (BCVA), intraocular pressure (IOP) in the pre- and postoperative periods and postoperative IOL decentration were recorded. RESULTS: The mean follow-up period was 25.9 months (range 15-35 months). Capsule collapse did not occur in any eye with a CTR. Postoperatively, four eyes developed raised IOP that responded well to medical therapy. An improvement in BCVA was observed in all eyes except one because of co-existing fundus pathology. No IOL was found to be decentrated at the end of the follow-up period, apart from one eye in which the PC IOL was dislocated due to a postoperative trauma, in which an anterior chamber IOL was implanted. CONCLUSIONS: In cases of cataract associated with large traumatic zonular dialysis, implanting a CTR before or during phacoemulsification with an in-the-bag PC IOL is relatively safe technique with a high success rate. The CTR was found to be efficient in preventing IOL decentration in eyes with traumatic zonular deficiency.     

Efficacy of haptic sutured in-the-bag intraocular lens for intraocular lens-capsule complex stability: a comparison of three insertion methods

AIM: To evaluate the efficacy and stability of haptic sutured in-the-bag intraocular lens (IOL) in eyes with zonular instability. METHODS: A total 60 eyes of 60 patients were included in this retrospective cohort study. Postoperative stability in three groups [haptic sutured IOL in the bag, IOL in the bag insertion with haptics oriented toward areas of zonulysis, IOL with capsular tension ring (CTR) in the bag insertion] were compared according to the IOL insertion methods. To evaluate the IOL stability, the changes of anterior chamber depth (ACD), refraction, contraction of anterior continuous curvilinear capsulotomy (CCC) area, and tilt of IOL were compared. RESULTS: There was no significant difference in change of ACD (-0.04±0.01 mm in group of haptic sutured IOL, -0.07±0.01 mm in group of CTR insertion) and refraction (0.05±0.05 D in group of haptic sutured IOL, 0.37±015 D in group of CTR insertion) between the group of haptic sutured IOL in the bag and CTR insertion group. But in comparison of CCC contraction and IOL tilt, CTR insertion group showed less contraction (1.00%±0.52%) and less IOL tilt (2.66°±0.11°) than the group of haptic sutured IOL in the bag (6.32%±1.36%, 3.47°±0.11°, respectively). The CTR insertion group showed the least CCC contraction and the least tilt. CONCLUSION: In eyes with zonular instability, the method of haptic sutured IOL in-the-bag shows comparable stability in ACD and refraction in comparison with IOL with CTR in the bag insertion. The method of IOL only in-the-bag insertion shows the largest contraction of CCC and the largest tilt of IOL.     

Intraocular lens tilt and decentration, anterior chamber depth, and refractive error after trans-scleral suture fixation surgery.

OBJECTIVES: To compare the extent of intraocular lens (IOL) tilt and decentration, as well as the anterior chamber depth after trans-scleral suture IOL fixation after either secondary out-of-the-bag or primary in-the-bag IOL implantation. DESIGN: Retrospective, comparative, nonrandomized, interventional study. PARTICIPANTS: Fifty-two eyes that underwent scleral suture fixation were compared with 51 eyes that underwent secondary out-of-the-bag implantation and 50 eyes that underwent in-the-bag implantation. INTERVENTION: One-piece polymethyl methacrylate IOL implantation by three different techniques. MAIN OUTCOME MEASURES: The tilt angle and decentration length of the IOL, as well as the anterior chamber depth, were measured by the Scheimpflug videophotography system. The spherical equivalent error from the predicted value was also examined. RESULTS: The mean tilt angle in the scleral suture fixation group was significantly greater than that in either the out-of-the-bag or the in-the-bag implantation group (P<0.0001). The mean decentration length was also largest in the suture group, followed by the out-of-the-bag group and the in-the-bag group (P<0.0001). The anterior chamber depth in the suture group and the out-of-the-bag group was significantly smaller than that in the in-the-bag group (P<0.0001). The spherical equivalent error in the suture group and the out-of-the-bag group was also greater than that in the in-the-bag group (P<0.0001). CONCLUSIONS: The extent of both tilt and decentration after scleral suture fixation was greater than that observed after either out-of-the-bag or in-the-bag implantation. The anterior chamber depth with the sutured or out-of-the-bag fixated IOL was shallower than that with the in-the-bag fixated IOL, which resulted in a significant myopic shift.     

非球面人工晶状体植入术后偏心和倾斜与视觉质量的相关性研究

目的：探讨新型眼前节扫频光相干断层扫描仪CASIA2测量年龄相关性白内障患者植入非球面人工晶状体(IOL)术后的偏心和倾斜与视觉质量的关系。

方法：观察性研究。纳入年龄相关性白内障术后1mo随访的患者62例90眼。应用CASIA2于散瞳后测量IOL偏心和倾斜的大小和方向,进行3次测量,取其矢量平均值。再使用KR-1W波前像差仪和双通道视觉质量分析系统(OQAS)进行测量,获取4、6mm瞳孔直径下全眼总高阶像差(tHOA)、球面像差(SA)、彗差(Coma)、客观散射指数(OSI)、调制传递函数截止频率(MTF cut off)和斯特列尔比(SR)等参数。

结果：IOL偏心与4mm瞳孔直径下SA(r=0.347,P=0.001)和OSI(r=0.343,P=0.002)成正相关,与MTF cut off(r=-0.244,P=0.032)呈负相关,与tHOA、Coma和SR无相关。IOL倾斜与4mm瞳孔直径下MTF cut off(r=-0.345,P=0.002)和SR(r=-0.256,P=0.023)呈负相关,与tHOA、SA、Coma、OSI均无相关性。IOL的偏心和倾斜与6mm瞳孔直径下的tHOA、SA、Coma、MTF cut off、SR均无相关性。

结论：年龄相关性白内障患者植入非球面IOL后,除IOL偏心与4mm瞳孔直径下SA呈弱相关性,偏心和倾斜与其余各项高阶像差均无明显相关性,与视觉质量参数OSI值及MTF cut off值弱相关,提示临床医生在精准白内障手术中关注高阶像差及视觉质量。     

先天性晶状体半脱位手术治疗临床研究

目的 比较囊袋内张力环(CTR)植入术和人工晶状体(IOL)巩膜缝合固定术治疗先天性晶状体半脱位的有效性及安全性.方法 将2008年6月至2009年10月就诊的27例(45只眼)年龄3～50岁的先天性晶状体半脱位患者,随机分为两组,分别采用CTR植入并二期CTR固定术(24只眼)与IOL巩膜缝合固定术(21只眼)治疗,术后观察视力、最佳矫正视力(BCVA)、散光等指标,术后3个月行前节OCT及晶状体后照法测量IOL的倾斜及偏心值,记录手术并发症.结果 术后3个月,最佳矫正视力CTR组为0.75,IOL固定组为0.54;散光度数CTR固定后为1.47D,IOL固定组为2.35D;CTR固定后IOL倾斜为5.48°,IOL固定组IOL倾斜为7.37°;两组术后BCVA、散光、IOL倾斜度数的差异均有统计学意义(P<0.05):CTR固定后IOL偏心为1.09mm,IOL固定组IOL偏心为0.88mm,差异无统计学意义(P>0.05).IOL固定组4只眼IOL夹持.结论 超声乳化晶状体吸除联合囊袋内CTR和IOL植入、二期CTR巩膜缝合固定术是治疗先天性晶状体半脱位的更好选择.     

Comparison of decentration and tilt between one piece and three piece polymethyl methacrylate intraocular lenses

BACKGROUND—The extent of the decentration and tilt was prospectively compared between one piece polymethyl methacrylate (PMMA) and three piece PMMA intraocular lenses (IOLs) which were implanted in the capsular bag after performing continuous curvilinear capsulorhexis.
METHODS—91 patients underwent a one piece PMMA IOL implantation in one eye as well as the implantation of the three piece PMMA IOL with polyvinylidene fluoride loops in the opposite eye. The length of the lens decentration and the angle of the tilt were quantitated using the anterior eye segment analysis system (EAS-1000) at 1 week as well as 1, 3, and 6 months postoperatively.
RESULTS—The mean length of the decentration in the one piece IOL was smaller than that in the three piece IOL at 1 week (p=0.0092), 1 month (p=0.0044), 3 months (p=0.0069), and 6 months (p=0.0010) postoperatively. However, no significant difference was found in the degree of the tilt between the two types of IOLs throughout the observation periods.
CONCLUSION—These results clarified that the one piece PMMA IOL with rigid PMMA haptics implanted in the capsular bag provides a better centration than the three piece PMMA IOL with flexible haptics, whereas the tilt was the same between the two types of IOLs.

Keywords: intraocular lens; decentration; tilt; continuous curvilinear capsulorhexis     

囊袋张力环在高度近视白内障超声乳化及人工晶状体植入术中的应用

目的:评价晶状体囊袋张力环在高度近视白内障联合低度数人工晶状体手术中的应用价值。方法:对427例549眼高度近视白内障患者行超声乳化白内障吸出术及后房型人工晶状体和囊袋张力环植入,术后随访3～18mo,测视力、眼压、散大瞳孔进行眼前节裂隙灯观察照像。结果:所有植入的人工晶状体均位于正位,术后3mo矫正视力>0.8者43眼,0.6～0.8者118眼,0.5者89眼,0.4者101眼,0.3者66眼,0.2者80眼,<0.2者52眼;术后1d眼压为3～47mmHg,一过性高眼压179眼,其中有1例患眼因术后高眼压无法药物控制而不得不取出CTR;随访18mo中有2例患眼发生视网膜脱离、5例患眼因发生后发性白内障而行激光治疗。结论:晶状体囊袋张力环在高度近视白内障联合低度数人工晶状体手术中的应用能防止晶状体悬韧带离断,使人工晶状体居中性更佳,并进而能有效防止后发性白内障和视网膜脱离的发生。     

Capsular tension ring implantation after capsulorhexis in phacoemulsification of cataracts associated with pseudoexfoliation syndrome. Intraoperative complications and early postoperative findings.

PURPOSE: To evaluate the effect of an endocapsular tension ring in preventing zonular complications during phacoemulsification of cataracts associated with pseudoexfoliation syndrome. SETTING: Eye Clinic of Beyo?lu Education and Research Hospital, Istanbul, Turkey. METHODS: A prospective randomized study comprised 78 eyes with cataract and pseudoexfoliation syndrome that were randomly divided into 2 groups. The age, sex, cataract density, iridodonesis, axial length, anterior chamber depth, best corrected visual acuity (BCVA), and intraocular pressure (IOP) were matched between groups. In 39 eyes, a capsular tension ring (CTR) was implanted after capsulorhexis and hydrodissection but before nucleus emulsification. Thirty-nine eyes that did not have a CTR implanted served as a control. The main outcome measures were the rates of intraoperative zonular separation and capsular fixation of a foldable intraocular lens (IOL). Posterior capsule rupture without zonular dialysis, vitreous loss, corneal edema, fibrin in the anterior chamber, BCVA, and IOP in the immediate postoperative period were also compared between the 2 groups. RESULTS: Five eyes (12.8%) in the control group and no eye in the CTR group had intraoperative zonular separation (P =.02). Posterior capsule rupture without zonular separation occurred in 3 eyes (7.7%) in the control group and 2 (5.2%) in the CTR group. Capsular IOL fixation was achieved in 37 eyes (94.9%) in the CTR group and 31 eyes (74.3%) in the control group (P =.012). The difference in BCVA was not statistically significant between the 2 groups (P =.44); however, uncorrected visual acuity (UCVA) was significantly better in the CTR group (P =.026). CONCLUSION: In cases of cataract associated with pseudoexfoliation syndrome, implanting a CTR before phacoemulsification of the nucleus reduced intraoperative zonular separation, increased the rate of capsular IOL fixation, and improved UCVA.     

囊袋张力环应用对伴有悬韧带松弛的高度近视合并白内障患者的疗效

目的:探讨伴有悬韧带松弛的高度近视合并白内障患者行超声乳化(Phaco)联合人工晶状体(IOL)植入术中囊袋张力环(CTR)的应用效果。方法:前瞻性研究。选取2020-04/2021-08于我院行Phaco联合IOL植入术的伴有悬韧带松弛的高度近视合并白内障患者80例80眼,采用随机数字表法分为CTR组(40例40眼,行Phaco联合CTR及IOL植入术)和对照组(40例40眼,行Phaco联合IOL植入术)。比较两组患者手术前后最佳矫正远视力(BCDVA)、前囊口面积、IOL总倾斜度、主观视觉质量。结果:术后1、3、6mo,两组患者BCDVA均较术前改善(P<0.05),眼压均较术前降低(P<0.05),CTR组患者前囊口面积大于对照组,IOL总倾斜度低于对照组(P<0.001),两组患者主观视觉质量评分均较术前升高(P<0.05),且CTR组主观视觉质量评分高于对照组(P<0.001)。术后随访6mo内,CTR组患者术后并发症总发生率低于对照组(7.5%vs 25.0%,P<0.05)。结论:对伴有悬韧带松弛的高度近视合并白内障,Phaco联合I...     

扫频OCTCASIA2测量白内障患者术前晶状体与术后人工晶状体偏心和倾斜的相关性

目的：应用眼前节扫频OCT CASIA2研究白内障患者术前晶状体和术后人工晶状体（IOL）偏心和 倾斜的相关性。方法：自身对照研究。纳入2020年3月至7月于川北医学院附属医院接受白内障手 术的患者109例（157眼）,其中右眼80眼,左眼77眼,年龄为48~88（69.8±9.1）岁。应用CASIA2 于白内障手术前、术后1周测量散瞳前、后晶状体和IOL的偏心和倾斜,3次测量并取其矢量平均 值。采用Pearson相关分析术后IOL与术前晶状体相同指标间的相关性。结果：在散瞳前,白内障 患者右眼术后IOL偏心量与术前晶状体无相关性,术后IOL偏心轴向、倾斜度及倾斜轴向与术前 晶状体的相同指标均分别呈正相关（r=0.48, P<0.001; r=0.53, P<0.001; r=0.36, P=0.002）;左眼术后 IOL偏心量与术前晶状体同样无相关性,术后IOL倾斜度与术前晶状体的倾斜度呈中等强度相关 性（r=0.44, P＜0.001）,术后IOL偏心轴向、倾斜轴向与术前晶状体的相同指标分别呈较强相关性 （r=0.62, P<0.001; r=0.91, P<0.001）。散瞳后测量,右眼术后IOL偏心量与术前晶状体呈弱相关性 （r=0.26, P=0.024）,右眼术后IOL偏心轴向、倾斜度和倾斜轴向与术前晶状体的相同指标均分别成正 相关性（r=0.34, P=0.004; r=0.56, P<0.001; r=0.36, P=0.002）;左眼术后IOL偏心量与术前晶状体无相 关性,左眼术后IOL与术前晶状体的偏心轴向、倾斜度及倾斜轴向均分别呈较强的正相关性（r=0.64, P=0.010; r=0.55, P<0.001; r=0.93, P<0.001）。结论：除偏心量外,CASIA2测量白内障患者术后IOL 和术前晶状体的偏心轴向、倾斜度和倾斜轴向均分别呈正相关,且倾斜轴向的相关性最高。临床可 参考白内障术前晶状体的偏心和倾斜,为患者选择更合适的IOL。     

Technique of using Cionni-modified capsular tension ring in the management of severely traumatic lens subluxation

AIM: To investigate the effect of Cionni-modified capsular tension ring (CTR) implantation in patients with severely traumatic subluxated cataracts. METHODS: All patients who totally had traumatic cataracts and lost zonule support and underwent cataract surgery were retrospectively analyzed. Corrected distance visual acuity (CDVA), extent of zonulysis, intraocular lens (IOL) position, intraoperative presentation, and complications were assessed. The primary outcomes included IOL centration stability and other postoperative complications. RESULTS: Twenty patients (20 eyes) were included in this study. The mean age in this study was 58.0±11.3y, and the average follow-up time was 17.3±12.8mo. Capsule bags were saved by Cionni-modified CTR. Nine eyes (45%) underwent simultaneously anterior vitrectomy due to the presence of vitreous in the anterior chamber. The preoperative mean CDVA was 0.83±0.24 logMAR, and the postoperative average CDVA was 0.23±0.30 logMAR (P<0.05). The horizontal and vertical IOL decentration after surgery was 0.27±0.12 mm and 0.41±0.19 mm, respectively; the vertical and horizontal IOL tilt after surgery was 5.5°±2.5° and 6.1°±2.2°, respectively. None of the eyes had obvious IOL decentration during the follow-up time. Eight eyes (40%) had posterior capsule opacification (PCO) that was severe enough to cause poor vision. Neodymium: YAG laser capsulotomy were performed on these eyes when the CTR was stabilized. CONCLUSION: With the help of Cionni-modified CTR, capsular bag preservation and better IOL concentration can be achieved without major complications in patients with severely traumatic subluxated cataracts.     

无缝线巩膜层间固定术和传统睫状沟缝线悬吊术后患者人工晶状体位置特征及其与预后视力的关系

目的 对比分析无缝线巩膜层间固定术和传统睫状沟缝线悬吊术后患者人工晶状体位置特征及与预后视力的关系.方法 选取2017年5月至2019年9月在我院行后房型人工晶状体无缝线巩膜层间固定术的患者13例(14眼)作为层间固定术组;另外,选取行后房型人工晶状体睫状沟缝线悬吊术的患者13例(14眼)作为缝线悬吊术组.两组患者性别...     

Capsulorhexis phimosis in retinitis pigmentosa despite capsular tension ring implantation.

A 56-year-old man with retinitis pigmentosa presented with dense nuclear sclerosis and scattered zonular loss with laxity confirmed by ultrasound biomicroscopy. He had extracapsular cataract extraction with a 6.0 mm continuous curvilinear capsulorhexis and implantation of a capsular tension ring (CTR) and a single-piece poly(methyl methacrylate) (PMMA) intraocular lens (IOL) in the capsular bag in his left eye. Severe anterior capsule fibrosis and contracture of the capsulorhexis opening with nasal decentration of the IOL were noted 4 months after surgery. A neodymium:YAG (Nd:YAG) laser anterior capsulotomy was performed to prevent further zonular stress and IOL decentration. The centripetal forces of capsular fibrosis after cataract surgery may exceed the centrifugal resistance of the standard CTR and PMMA IOL in patients with retinitis pigmentosa. Such patients must be carefully monitored postoperatively. An Nd:YAG laser anterior capsulotomy is a safe and effective option to manage anterior capsule fibrosis.     

晶状体囊袋张力环在晶状体悬韧带断裂的白内障手术中的应用

目的　评价晶状体囊袋张力环 (capsulartensionring ,CTR)在晶状体悬韧带断裂的白内障手术中的应用。方法　对 11例 ( 11只眼 )外伤性晶状体悬韧带部分断裂的患者行白内障手术 ,术中连续环形撕囊后植入CTR ,然后行白内障摘除及后房型人工晶状体囊袋内植入。结果　 11只眼的人工晶状体均处于正位 ,无倾斜及明显偏位。术后 1个月矫正视力 0 4者 4只眼、0 5～ 0 8者 5只眼、>0 8者 2只眼。 1只眼因CTR直径过大 ,可见CTR 2个端口重叠。除白内障手术固有的并发症外 ,未见CTR引起其他并发症。结论　对晶状体悬韧带断裂的白内障患者术中应用CTR ,可利于术中操作 ,防止术后人工晶状体偏位的发生 ,并且有助于患者视力恢复 ;CRT是一种有效的白内障手术辅助工具。     

超声生物显微镜下两种非球面人工晶状体倾斜度和偏心量的比较

目的：用超声生物显微镜观察两种非球面人工晶状体在囊袋内植入后倾斜度和偏心量的差异。 方法：选取白内障患者37例45眼随机分为两组：A组植入Akreos AO后房型人工晶状体（美国博士伦公司,四襻型）;B组植入ZCBOO后房型人工晶状体（美国眼力健公司,两襻型）。所有患者均行标准白内障超声乳化吸取联合人工晶状体植入术,记录手术中的撕囊口直径。术后1 mo记录视力及最佳矫正视力、行常规裂隙灯检查,并利用超声生物显微镜测量前房深度,得到水平方位和垂直方位的倾斜度、偏心量,并计算人工晶状体总的倾斜度和偏心量。 结果：两组在撕囊口直径及术后最佳矫正视力的差异无统计学意义（P〉0.05）。 A组和B组前房深度平均值分别为：（3.86±0.31mm）和（4.14±0.31mm）,差异有统计学意义（P〈0.05）。 A组在水平方向上的偏心量、垂直方向上的偏心量和总偏心量平均值分别为（0.15±0.09mm）,（0.15±0.12mm）和（0.22±0.12mm）,在水平方向上的倾斜度、垂直方向上的倾斜度和总倾斜度平均值分别为0.63°±0.62°,0.89°±0.85°和1.22°±0.76°;B组在水平方向上的偏心量、垂直方向上的偏心量和总偏心量平均值分别为（0.22±0.21mm）,（0.14±0.15mm）和（0.29±0.22mm）,在水平方向上的倾斜度、垂直方向上的倾斜度和总倾斜度平均值分别为1.36°±1.48°,1.46°±1.62°和2.21°±1.97°。两组人工晶状体水平方向和垂直方向上的偏心量及倾斜度差异无统计学意义,总的偏心量及倾斜度差异无统计学意义（P〉0.05）。 结论：两襻设计的人工晶状体和四襻设计的人工晶状体在术后的倾斜度和偏心量无差别。