Anterior chamber and sutured posterior chamber intraocular lenses in eyes with poor capsular support

PURPOSE: To compare the clinical outcomes and complications of patients who had surgical placement of anterior chamber (AC IOLs) and sutured posterior chamber intraocular lenses (PC IOLs) after cataract surgery resulting in poor capsular support. SETTING: Department of Ophthalmology, Bascom Palmer Eye Institute, Miami, Florida. METHODS: A retrospective interventional comparative case series of 181 eyes of 181 patients that had implantation of an intraocular lens with inadequate capsular support was conducted. A chart review of all patients that had implantation of AC IOLs or sutured PC IOLs at a tertiary care eye hospital between 1995 and 2001 was conducted. RESULTS: Outcome measures included final best-corrected visual acuity, spherical equivalent, and postoperative complications (pseudophakic bullous keratopathy, elevated intraocular pressure [IOP] inflammation, retinal detachment, suture erosion, cystoid macular edema). Of 702 charts reviewed, 181 were found to fit inclusion and exclusion criteria. The postoperative complication risk ratio was 0.80 (95% confidence interval [CI]: 0.52-1.23) for AC IOLs compared with PC IOLs. The most common complication experienced by patients having implantation of either lens type was elevated IOP (AC IOL: 38%; PC IOL: 42%). The incidence of other complications was similar between the groups. Best-corrected visual acuity was similar; however, final spherical equivalent trended toward more myopic values in the PC IOL group (-0.82 +/- 1.67 for AC IOL versus -1.32 +/- 2.12 for PC IOL). CONCLUSIONS: The findings suggest that no significant differences in outcome exist when comparing AC IOLs to sutured PC IOLs in complicated cataract extraction with poor capsular support. Recent advances in AC IOL design have yielded lenses that provide a safe, effective alternative to sutured PC IOLs.     

Iris fixation of posterior chamber intraocular lenses

PURPOSE: To describe a technique for suture fixation of silicone intraocular lenses (IOLs) to the iris and compare the outcomes to those in published data. SETTING: Subspecialty cornea/anterior segment private practice, Indianapolis, Indiana, USA. METHODS: This retrospective review comprised 121 consecutive cases of secondary IOL implantation or IOL exchange between 1993 and 1998. All cases had concurrent anterior or posterior vitrectomy. Intraocular lens exchange was performed in 96 eyes, secondary IOL implantation in 20 eyes, and primary IOL implantation in 5 eyes. Penetrating keratoplasty (PKP) was performed concurrently in 93 eyes, extracapsular cataract extraction in 1 eye, intracapsular cataract extraction in 2 eyes, pars plana lensectomy in 2 eyes, and Molteno tube shunt placement for uncontrolled glaucoma in 1 eye. Outcomes measured were graft survival, visual acuity, new onset or worsening of glaucoma, and complications related to surgery. RESULTS: Graft survival at last follow-up was 89.2% in patients having PKP. Visual acuity was 20/80 or better in 58.3% and 20/40 or better in 30.5% of eyes with transplants. Without transplants, visual acuity was 20/80 or better in 82.0% and 20/40 or better in 57.1%. Glaucoma developed or worsened in 24.7% and improved in 16.1% with transplants; it developed or worsened in 7.0% and improved in 17.8% without transplants. Retinal detachment occurred in 1 eye with a transplant. In the nontransplant group, major complications were bullous keratopathy (n = 2) and tilted IOL (n = 1). CONCLUSIONS: Iris fixation of posterior chamber silicone IOLs may decrease the possibility of late suture breakage and dislocation of the IOL, as well as the risk of endophthalmitis. Graft survival, visual acuity, glaucoma, and complications are similar to those of other methods of IOL fixation reported in the literature.     

Implantation of posterior chamber intraocular lenses by suture fixation without capsular and zonular support

We implanted sulcus-fixated posterior chamber intraocular lenses (PCL) in three cataractous, six aphakic, and four eyes during penetrating keratoplasty due to corneal opacity in the absence of capsular and zonular support. This technique has been successfully performed in all cases and produced good visual outcome in 12 eyes (93%). In four eyes which had penetrating keratoplasty and the fixation of PCL, one developed vitreous hemorrhage and one developed corneal graft rejection.     

前囊膜夹持人工晶状体植入术疗效观察

目的 提供一种后囊膜无功能性支撑作用时后房型人工晶状体睫状沟植入技术的改进方法。方法行角膜缘透明切口白内障超声乳化人工晶状体植入术29例(29眼)，术中采用连续环形撕囊，所有病例术中均发生非计划内后囊膜破裂，后房型人工晶状体改行睫状沟植入，光学部置于环形前囊膜下。术后随访时间3～21个月。结果全部病例术后最佳矫正视力均好于或等于0．3，术中并发症主要为后囊膜破裂(29眼)，8眼行前部玻璃体切割术，无一眼虹膜损伤。术后11眼出现一过性角膜水肿。结论对后囊膜无功能性支撑作用的病例，后房型人工晶状体借助具有连续环形开口的前囊膜夹持固定，可获得良好的视力及相对较低的并发症发生率。     

无晶体后囊后房型人工晶体固定术

报告无晶体后囊后房型人工晶体巩膜～睫状沟缝线固定术,经31例手术,认为我们的方法简便、易行、安全可靠,经1年半至3年9个月的随访观察,31例的结果均同术后的结果.     

后房型人工晶体巩膜缝线固定术

报告一种后房型人工晶体（ＰＣＩＯＬｓ）睫状沟植入技术。７０眼（７０例）行穿透巩膜的ＰＣＩＯＬｓ缝线固定术,术后随访６￣３６个月（平均１８个月）。术前视力ＣＦ￣０．１。术后４３眼（６１．５％）视力增进至０．４￣０．６,７眼（１０％）至０．７￣１．０,很少有并发症发生。介绍了手术方法及术中注意事项,该手术的开展使ＰＣＩＯＬｓ。植入几可以应用于所有白内障摘除术眼。     

Suture fixation technique for posterior chamber intraocular lenses

We describe a modified method for scleral fixation of posterior chamber intraocular lenses (IOLs). A double-armed, 10-0 polypropylene (Prolene) suture on a curved long needle is passed through a groove in the sclera and retrieved within the barrel of a bent 25-gauge needle through the opposite groove. Double transscleral passages enable 4-point fixation and provide better stability and centration. Knots are buried completely in the scleral groove. In a series of 10 cases, the IOLs were well centered, no sutures protruded from the scleral groove, and the vision in all eyes improved. In 1 case, a ciliary hemorrhage occurred during insertion of the 25-gauge needle, but the bleeding stopped after ocular pressure reform. This technique is easy to perform, improves centration and stability of the IOL, and avoids suture exposure.