Surgical management of late dislocated lens capsular bag with intraocular lens and endocapsular tension ring

A case of late spontaneous dislocation of the lens capsular bag (CB) with foldable acrylic intraocular lens (IOL) and endocapsular tension ring (CTR) and its surgical management is reported in a 52-year-old man. The dislocation occurred 2 years 3 months after phacoemulsification cataract surgery in which a CTR was used for zonular instability. A 3-port pars plana vitrectomy was performed. Because it was not possible to grasp the IOL-CTR-CB complex, perfluorocarbon liquid was used to attempt to float it up. This was unsuccessful, so a scleral indenter was used to apply external pressure on the sclera to tilt the IOL-CTR-CB complex into a position where it could be grasped with a forceps and removed through a corneal section. A scleral-fixated IOL was placed, and the patient achieved a best corrected visual acuity of 6/9. The procedure was safe and effective without intraocular complications.     

Surgical management of spontaneous in-the-bag intraocular lens and capsular tension ring complex dislocation

We describe a technique to manage late spontaneous intraocular lens (IOL) and capsular tension ring (CTR) dislocation within the intact capsular bag. The subluxated IOL and CTR complex can be positioned in a closed chamber and fixed to the pars plana at both 3 and 9 o’clock quadrants with the presented ab externo direct scleral suturation technique which provides an easy, safe and effective surgical option for such cases.     

Late spontaneous in-the-bag intraocular lens and capsular tension ring dislocation in pseudoexfoliation syndrome

Two patients with pseudoexfoliation syndrome (PEX) in whom late spontaneous in-the-bag intraocular lens (IOL) and capsular tension ring (CTR) dislocation occurred 3 and 6 years after cataract surgery are described. The patients received CTRs because of phacodonesis due to zonular laxity. The IOLs were centered postoperatively, and there was no postoperative ocular trauma. In both cases, removal of the IOL and CTR within the capsular bag was performed uneventfully by a scleral tunnel incision and an anterior chamber IOL was implanted. Capsular tension ring implantation in PEX-associated zonular weakening does not guarantee long-term zonular stability and capsular bag/IOL position in these patients after cataract surgery.     

Phacoemulsification of subluxated lens with capsular tension ring implantation

PURPOSE: To evaluate long term results of phacoemulsification with PC IOL and capsular tension ring (CTR) implantation in lens subluxation. MATERIAL AND METHODS: The study comprised of 134 patients--146 eyes with subluxated lens. In all cases phacoemulsification with PC IOL and CTR implantation was performed. RESULTS: No intaroperative complications has occured. Postoperative complications included: inflammation in the anterior chamber in 3 eyes (2.1%), retinal detachment in 2 eyes (1.4%). In all cases there was no PC IOL decentration. CONCLUSIONS: (1) CTR facilitates phacoemulsification with PC IOL implantation in lens subluxation. (2) Phacoemulsification of subluxated lens with PC IOL and CTR implantation seems to be safe and effective procedure.     

Effect of a capsular tension ring on intraocular lens decentration and tilting after cataract surgery

PURPOSE: To evaluate the effect of a capsular tension ring (CTR) on the tilting and decentration of intraocular lenses (IOLs) after cataract surgery. SETTING: Department of Ophthalmology, Ilsan Paik Hospital, Inje University, Kyunggyi-do, Korea. METHODS: Cataract surgery was performed in both eyes of 20 patients ranging in age from 57 to 75 years. The 40 eyes were divided into 2 groups based on whether a CTR (Lucid Korea) was implanted. Each patient received a CTR in 1 eye only. All IOLs (AcrySof MA60BM, Alcon) were implanted in the capsular bag after a continuous curvilinear capsulorhexis smaller than the IOL optic was created and phacoemulsification performed. The extent of IOL tilting and decentration was measured with the EAS-1000 anterior eye segment analysis system 7, 30, and 60 days after surgery. RESULTS: The extent of IOL decentration was statistically significantly less in eyes with both an IOL and CTR than in those with an IOL only. The mean decentration in the CTR-IOL group was 0.38 mm +/- 0.16 (SD) at 7 days, 0.43 +/- 0.15 mm at 30 days, and 0.42 +/- 0.17 mm at 60 days. The mean values in the IOL-only group were 0.49 +/- 0.11 mm, 0.53 +/- 0.14 mm, and 0.57 +/- 0.16 mm, respectively. The amount of IOL tilting was also significantly less in the CTR-IOL group. The mean tilting in the CTR-IOL group was 2.22 +/- 0.46 degrees at 7 days, 2.36 +/- 0.50 degrees at 30 days, and 2.47 +/- 0.40 degrees at 60 days. The mean values in the IOL-only group were 3.14 +/- 0.65 degrees, 2.91 +/- 0.67 degrees, and 3.06 +/- 0.56 degrees, respectively. CONCLUSION: These results indicate that the CTR reduces undesirable postsurgical IOL movement for at least 60 days.     

Microincision multifocal intraocular lens with and without a capsular tension ring: optical quality and clinical outcomes

PURPOSE: To study the effect of a capsular tension ring (CTR) on the visual, refractive, and intraocular optical quality of a multifocal intraocular lens (IOL) with diffractive asymmetrical light distribution. SETTING: Vissum-Instituto de Oftalmológico de Alicante, Alicante, Spain. METHODS: An Acri.Lisa 366D IOL was implanted without CTR implantation in 54 eyes (Group 1) or with Acri.Ring BR 11 CTR implantation in 40 eyes (Group 2). Intraocular optical quality in vivo was characterized by the difference between the postoperative total and corneal optical aberrations. Visual, refractive, and intraocular optical outcomes were evaluated 3 months postoperatively. Main outcome measures included postoperative residual refraction, uncorrected and corrected far and near visual acuities, intraocular aberrations, the Strehl ratio, and the modulation transfer function (MTF). RESULTS: The postoperative means in Group 1 were spherical equivalent, 0.31 +/- 0.45 diopters (D); uncorrected distance acuity, 0.79 +/- 0.19; best corrected distance acuity, 0.95 +/- 0.11; uncorrected near acuity, 0.77 +/- 0.21; best corrected near acuity, 0.89 +/- 0.14; best distance-corrected acuity, 0.90 +/- 0.12. The Group 2 means were -0.18 +/- 0.60 D, 0.74 +/- 0.23, 0.98 +/- 0.07, 0.72 +/- 0.22, 0.86 +/- 0.14, and 0.86 +/- 0.14, respectively. Group 2 had a statistically significant reduction in intraocular aberrations and a significant increase in MTF values and Strehl ratios compared with Group 1. CONCLUSION: Combined use of the CTR and Acri.Lisa 366D IOL provided good efficacy, predictability, and safety and increased the intraocular optical performance, suggesting better IOL stability.     

Capsular bag shrinkage after implantation of a capsular bending or capsular tension ring

PURPOSE: To evaluate the influence of a capsular bending ring (CBR) or tension ring (CTR) on capsular bag shrinkage. SETTING: Department of Ophthalmology, Johannes Gutenberg-University, and Department of Medical Biometry, Epidemiology and Informatics, University of Mainz, Mainz, Germany. METHODS: In 92 eyes of 92 patients, a capsular measuring ring (CMR) was implanted after phacoemulsification to measure capsular bag size in vivo. Patients were randomized into 3 groups: The first received a CMR and CBR, the second received a CMR and CTR, and the third received a CMR alone. Measurements were performed preoperatively, intraoperatively, during the first 3 postoperative days, and after 1 and 3 months. Preoperative biometric characteristics such as axial length (AL) and anterior chamber depth were determined. Primary clinical end points were capsular bag size and capsulorhexis diameter measured intraoperatively and by means of slitlamp biomicroscopy and retroillumination photography postoperatively. RESULTS: There were no clinically relevant group differences in AL, anterior chamber depth, or capsulorhexis diameter. Eyes implanted with the CBR showed shrinkage of the capsular bag from 10.6 to 10.4 mm after a median of 3 months (sign test; P = .023); eyes with a CTR showed comparable median capsular bag shrinkage from 10.5 to 10.2 mm (P<.001), whereas eyes without a CTR showed a median shrinkage from 10.5 to 10.0 mm (P<.001). Intraindividual shrinkage was of a similar, although significantly different, order among these groups (median shrinkage 0.15 versus 0.23 and 0.38 mm, respectively; all pairwise Wilcoxon test; P = .050, P = .020, P<.001, respectively). CONCLUSIONS: Capsular shrinkage can be inhibited by a CBR and, to lesser extent, a CTR; the gain in shrinkage prevention is limited when compared with a CMR, however. This conclusion can be drawn only for the specific CBR or CTR and hydrophobic acrylic intraocular lens (IOL) used in this study. Reduction of capsular bag shrinkage after CTR implantation may reduce IOL dislocation and tilt and help to maintain postoperative visual acuity.     

Results of intraocular lens implantation with capsular tension ring in subluxated crystalline or cataractous lenses in children

Purpose:

To evaluate the outcome of intraocular lens (IOL) implantation using capsular tension ring (CTR) in subluxated crystalline or cataractous lenses in children.

Setting:

Tertiary care setting

Materials and Methods:

We prospectively studied 18 eyes of 15 children with subluxation of crystalline or cataractous lenses between 90° up to 210° after phacoemulsification, CTR and IOL implantation. Each child was examined for IOL centration, zonular dehiscence and posterior capsular opacification (PCO).

Results:

Age of the patient ranged between five to 15 years. Out of 18 eyes, seven had traumatic and 11 had spontaneous subluxation of crystalline or cataractous lens. Phacoemulsification was successfully performed with CTR implantation in the capsular bag. Intraoperative zonular dialysis occurred in two eyes. Anterior vitrectomy was performed in six eyes to manage vitreous prolapse. IOL implanted was polymethyl methacrylate (PMMA) in eight eyes, hydrophobic acrylic in seven and hydrophilic acrylic in three. Follow-up ranged from 24 months to 72 months. Sixteen eyes had a best corrected visual acuity of 20/40 or better. Nine eyes developed significant PCO and were managed with Neodymium Yttrium Aluminum Garnet (Nd:YAG) laser posterior capsulotomy. One eye with acrylic IOL in the capsular bag had IOL dislocation after two years which was managed with vitrectomy and secondary trans-scleral fixation of IOL.

Conclusions:

Phacoaspiration with CTR implantation makes capsular bag IOL fixation possible in most of the eyes with subluxated crystalline or cataractous lenses. PCO still remains a challenge in children with successful phacoaspiration with CTR implantation     

Capsule measuring ring to predict capsular bag diameter and follow its course after foldable intraocular lens implantation

PURPOSE: To evaluate the extent of capsular bag shrinkage after cataract surgery with intraocular lens (IOL) implantation and develop a regression formula to predict postoperative capsular bag size. SETTING: Eye Hospital, Johannes Gutenberg-University, Mainz, Germany. METHODS: The axial length (AL), anterior chamber depth, and corneal radius in 58 eyes were measured preoperatively. Cataract surgery was by phacoemulsification followed by implantation of a 3-piece, acrylic, posterior chamber IOL. The capsular bag diameter and anterior capsulorhexis were measured intraoperatively and 1 day and 1, 3, and 6 months postoperatively using a Koch capsule measuring ring (HumanOptics). RESULTS: The mean capsular bag size was 10.53 mm intraoperatively, 10.31 mm at 1 day, 9.62 mm at 1 month, 9.07 mm at 3 months, and 9.01 mm at 6 months. The mean capsular bag shrinkage over the entire postoperative period was 14.8% (P<.001). Of the parameters studied, only AL had a positive correlation with capsule shrinkage. The correlation was moderate but statistically significant (P =.001). CONCLUSIONS: A correlation was found between capsular bag shrinkage and AL. Using preoperative biometric data, a regression formula of moderate validity was determined to predict capsular bag shrinkage.     

晶状体囊袋张力环在半脱位晶状体术中的应用

目的探讨张力环在晶状体半脱位术中应用的安全性和效果。方法回顾性分析晶状体半脱位患者24例(30只眼)的手术效果,植入张力环组12例(18只眼),未植入张力环组12例(12只眼)。结果(1)术中悬韧带断离范围扩大:张力环组5眼(27.78%),未植入张力环组12(100%),两组之间的差异有统计学意义(P<0.05)。(2)玻璃体脱出:张力环组6眼(33.33%),未植入张力环组7眼(58.33%),两组之间的差异有统计学意义(P<0.05)。(3)人工晶状体植入囊袋:张力环组15眼(83.33%),未植入张力环组3眼(25.00%),两组之间的差异有统计学意义(P<0.05)。(4)术后视力≥0.5:张力环组12眼(66.67%),未植入张力环组3眼(25.00%),两组之间的差异有统计学意义(P<0.05)。结论对于晶状体半脱位的患者,晶状体囊袋张力环植入手术的安全性和效果优于未植入张力环手术。     

Analysis of capsular bag defects and intraocular lens positions for consistent centration

Radial anterior capsular tears frequently occur in posterior-chamber iris-plane phacoemulsification cases. These tears extend to the capsular bag equator and can allow the knee of an in-the-bag posterior chamber intraocular lens (IOL) to unfold a smaller anterior capsular remnant. This unfolding can allow the knee of the IOL loop to extend beyond the capsular equator, leading to IOL decentration. Typical anterior capsular radial tear configurations along with guidelines for IOL design selection and orientation after recognition of these tears are presented. Proper IOL centration was achieved in 255 of 262 patients (97%) in a study observing these guidelines.     

Minimal lift-multiple rotation technique for capsular bag phacoemulsification and intraocular lens fixation

A method of capsular bag phacoemulsification is outlined step-by-step. The surgical technique has proven safe and efficient and preserves the architecture of the capsular bag for hard or soft intraocular lens implantation. It represents a practical, modern method for cataract extraction and intraocular lens implantation.     

晶状体半脱位白内障超声乳化术中植入囊袋张力环的临床观察

目的：探讨晶状体半脱位白内障超声乳化术中植入囊袋张力环的疗效.方法：对15例（15眼）晶状体半脱位白内障患者行超声乳化吸出术＋囊袋张力环＋后房型人工晶状体植入术.结果：15例（15眼）晶状体半脱位白内障患者,均顺利植入了囊袋张力环及后房型人工晶状体.术后患者视力均得以提高,人工晶状体位正,后囊膜平整,无皱缩,混浊,无明显手术并发症.结论：在晶状体半脱位白内障患者中植入囊袋张力环可提高手术的安全性,防止术后人工晶状体偏位,降低了后发性白内障的发生率.     

晶状体半脱位手术中囊袋张力环的应用

目的:评价晶状体囊袋张力环(capsulartensionring,CTR)在晶状体半脱位手术中的应用价值。方法:对8例(10眼)晶状体半脱位患者行白内障手术,术中连续环形撕囊后植入CTR,超声乳化术摘除白内障,囊袋内植入后房型人工晶状体。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2眼,0.5～0.8者4眼,0.4者2眼,0.1者2眼。无CTR引起的其他并发症。结论:晶状体囊袋张力环在手术治疗晶状体半脱位的白内障病例中,可有效地防止晶状体悬韧带断离范围扩大、确保术中人工晶状体囊袋内植入及防止术后人工晶状体移位。