Short-term outcome of Boston Type 1 keratoprosthesis for bilateral limbal stem cell deficiency

This study reports the short-term functional and anatomical outcome of Boston Type 1 keratoprosthesis (Boston Kpro) implantation for bilateral limbal stem cell deficiency (LCSD). Retrospective analysis was done on eight eyes of eight patients who underwent Boston Kpro implantation between July 2009 and October 2009. The best corrected visual acuity (BCVA) and slit-lamp biomicroscopy findings were assessed at 1, 3 and 6 months postoperatively. All eight eyes retained the prosthesis. BCVA of 20/40 or better was achieved in 8, 6, and 5 eyes at 1, 3, and 6 months, respectively, postoperatively. One patient each developed epithelial defect, sterile stromal melt and fungal keratitis in the late postoperative period associated with antecedent loss of the soft contact lens from the eye. Boston Kpro has good short-term visual and anatomical outcome in patients with bilateral LSCD, provided compliance with postoperative care can be ensured.     

Boston type 1 keratoprosthesis outcomes in ocular burns

Purpose: To report the outcomes of Boston type I keratoprosthesis (BKPro) in the management of ocular burn injuries. Methods: This was a prospective study including all cases of BKPro implantation for ocular burns at the External Diseases and Cornea Service of the Federal University of São Paulo, between February 2008 and February 2010. Ten patients (10 eyes) were enrolled. Procedures performed to manage ocular injury were identified, and data were collected regarding patients’ ocular history, surgical procedure(s) performed, and postoperative outcomes, including visual acuity, retention, complications and required surgical procedures. Results: A total of 11 Type 1 BKPro were implanted in 10 eyes of 10 patients. The mean follow‐up period was 25.7 ± 10.8 months. Preoperative best‐corrected visual acuity (BCVA) ranged from count fingers to light perception. Postoperative BCVA was better than 20/200 in 90% of the patients and better than 20/60 in 60% of the patients. The overall BKPro retention rate was 90%. The most common complications were retroprosthetic membrane formation (50%) and persistent corneal epithelial defect evolving to corneal melting (40%). Patients who underwent ocular surface procedures such as limbal transplantation prior to BKPRo implantation had a lower incidence of corneal melting/thinning (p = 0.07), although this was not statistically significant. Conclusion: The anatomical and functional results identified in this study support the use of BKPro in managing bilateral limbal stem cell deficiency secondary to ocular burns.     

人工角膜在治疗严重化学烧伤眼中的研究

目的探讨严重化学烧伤性角膜混浊患者行人工角膜植入术的临床效果和并发症等。方法选择2000年10月至2006年3月于解放军总医院眼科就治的28例因严重化学烧伤导致双眼盲目患者的单侧眼,术前视力14只眼为手动,14只眼为光感,并且角膜混浊病变无法采用常规角膜移植手术达到复明目的。其中严重碱烧伤20只眼,严重酸烧伤8只眼。人工角膜植入术分两期：Ⅰ期手术将人工角膜支架植入角膜层间,所选患眼行角膜表面或层间加固性手术。3个月后行Ⅱ期手术,植入带螺纹的人工角膜光学部。常规行晶状体、部分虹膜及前部玻璃体切除术,将外1／3上、下睑缘做永久性缝合。对完全睑球粘连者,用上、下睑皮肤覆盖角膜表面,仅暴露人工角膜光学部。结果Ⅱ期术后观察3—65个月,平均22．6个月,28只眼中有21只眼裸眼视力≥0．05（75％）,其中2只眼裸眼视力≥1．0。经镜片矫正后,11只眼（39％）视力为0．6—1．2;1只眼（4％）0．3～0．5;5只眼（18％）0．05—0．25;3只眼（11％）手动;3只眼（11％）光感;1只眼（4％）无光感。手术并发症包括分离角膜板层时穿人前房,晶状体皮质残留,继发性青光眼,镜柱前表面组织或上皮增生遮盖,镜柱后壁沉着物,角膜溶解,眼内炎,视网膜脱离。结论人工角膜是目前对严重角膜瘢痕、血管化的双眼化学烧伤患者有效的复明手段。该术式结合自体结膜遮盖、自体骨膜移植加固及睑裂部分缝合等,有利于人工角膜的长期存留。术后定期复查、积极预防并发症是保持视力的有效手段。     

Long-term outcomes of the MICOF keratoprosthesis surgery

PurposeTo evaluate long-term anatomical and functional outcomes of the MICOF keratoprosthesis to treat end-stage corneal blindness.DesignRetrospective review of consecutive clinical case series.ParticipantsBetween October 2000 and October 2015, at the Department of Ophthalmology of Chinese PLA General Hospital (PLAGH), a total of 132 eyes of 131 patients had undergone a MICOF keratoprosthesis implantation. Of those, 91 eyes of 90 patients were included in this study.MethodsPreoperative information, surgical procedures, and postoperative data were collected for each included eye.Main outcome measuresBest-corrected visual acuity (BCVA), keratoprosthesis retention, and significant postoperative complications were reported.ResultsThe most common indications for surgery were chemical or thermal burns (68.1%, 62 of 91 eyes) and explosive injury (12.1%, 11 of 91 eyes), followed by Stevens-Johnson Syndrome (10.0%, 9 of 91 eyes), Sjögren's syndrome (4.4%, 4 of 91 eyes), mucous membrane pemphigoid (3.3%, 3 of 91 eyes) and multi-penetrating keratoplasty failure (2.2%, 2 of 91 eyes). The mean follow-up duration was 8.38 ± 3.22 years (range: 5–17.25 years, median: 7.67 years).All patbients had a preoperative visual acuity of hand motions or worse. A MICOF keratoprosthesis significantly improved patients' visual function with bilateral end-stage corneal blindness. Postoperative visual acuity improved to 20/200 or better in 41 eyes (45.1%, of 91 eyes) and to 20/100 or better in 32 eyes (35.2% of 91 eyes) at the last follow-up visit. Preexisting glaucoma was present in 17 (18.7% of 91 eyes). The most common postoperative complications were overgrowth of the surface mucosa (31.9%, 29 of 91 eyes), glaucoma (25.3%, 23 of 91 eyes), retro-prosthetic membrane (15.4%, 14 of 91 eyes), keratoprosthesis device extrusion (15.4%, 14 of 91 eyes), superficial tissue thinning (14.3%, 13 of 91 eyes), endophthalmitis (13.2%, 12 of 91 eyes), titanium frame exposure (13.2%, 12 of 91 eyes), optical cylinder ante-displacement (13.2%, 12 of 91 eyes), cornea melting (7.7%, 7 of 91 eyes), retinal detachment (6.6%, 6 of 91 eyes) and aqueous humour leakage (2.2%, 2 of 91 eyes). 84.6% (77 of 91 eyes) of the eyes retained their initial keratoprosthesis at the latest follow-up.ConclusionsA MICOF keratoprosthesis is a reliable approach to rescue vision in end-stage corneal blinded patients and has better retention than a Boston Kpro TypeⅡ.     

人工角膜植入术的临床研究

评价复杂性角膜混浊患者行人工角膜植入术的临床效果和并发症等。方法选择15例双眼盲目患者的单侧眼15只,术前视力均为光感,角膜混浊病变无法用常规角膜移植手术达到复明目的。其中严重碱烧伤6只眼,严重酸烧伤3只眼,铝水烧伤2只眼,爆炸伤1只眼,严重实质性眼干燥症1只眼,多次穿透性角膜移植失败角膜严重血管化2只眼。人工角膜(MICOF)由俄罗斯费德洛夫眼外科中心制造。手术分两期：一期手术将人工角膜支架植入角膜层问,选择病例行角膜表面或层问加固性手术。约3个月后行二期手术,植入带螺纹的人工角膜光学部。常规行晶状体、部分虹膜及前部玻璃体切除术,将外1／3上、下睑缘做永久性缝合。对完全睑球粘连者,用上、下睑皮肤覆盖角膜表面,仅暴露人工角膜光学部。结果二期术后观察4～26个月,平均9．5个月,除1只眼视力光感外,其余眼裸眼视力0．12～1．0。手术并发症包括分离角膜板层时穿入前房,晶状体皮质残留,柱镜前表面结膜上皮遮盖,柱镜前表面纤维增生组织遮盖,柱镜后壁沉着物,角膜溶解。结论人工角膜特别适合于穿透性角膜移植难于成功的双眼盲目者,而且是对目前严重角膜瘢痕血管化、严重眼睑或泪液功能不良患者有效的复明手段。该术式结合自体结膜遮盖、骨膜层问移植及睑裂部分缝合等,有利于人工角膜的长期存留。     

AlphaCor™ keratoprosthesis: postoperative development of six patients

Purpose  AlphaCor™ (Argus Biomedical Pty. Ltd., Perth, Australia) is an artificial, soft, one-piece keratoprosthesis (KPro) indicated for severe corneal conditions not treatable by a donor graft. To evaluate the efficacy and visual restoring of six patients with complete corneal opacification and deep neovascularizations treated with AlphaCor™. Methods  A retrospective review of six patients with a history of corneal opacification treated with keratoprosthesis surgery. AlphaCor™ synthetic cornea was implanted into the corneal stroma. During the follow-up time, slit-lamp and ultrasound examinations, best corrected visual acuity (BCVA), and intraocular pressure measurements were performed. Results  Six eyes with corneal scarring and vascularizations in three to four quadrants of six patients to years of age underwent a keratoprosthesis procedure. The follow-up time was 13–36 months; mean 23 months. The operation procedure was not limited by severe complications. The preoperative BCVA was hand movement to light perception. The postoperative BCVA ranged between 20/200 and 80/100. Intraocular pressure was controlled in all cases. Three patients developed a melting of the anterior corneal lamella. The keratoprosthesis had to be explanted (15–34 months after implantation) and was replaced by a donor cornea. Conclusions  Further evaluation is needed to evaluate the role of AlphaCor™ as a keratoprosthesis.     

Boston keratoprosthesis type 1 for limbal stem cell deficiency after severe chemical corneal injury: A systematic review

Purpose

To systematically review the published literature on outcomes of Boston keratoprosthesis type 1 for the treatment of limbal stem cell deficiency secondary to severe chemical corneal injury.

国产化人工角膜植入兔眼的稳定性评估

目的 评价国产化人工角膜在兔眼角膜中的中长期稳定性.方法 实验研究.采用长耳大白兔10只,均选右眼作为国产化Moroz改良型永久性人工角膜植入眼,左眼为对照眼.手术分两期完成,一期手术用第三眼睑(软骨组织与人耳软骨有类似效果)加固角膜前层,联合自体结膜遮盖植入人工角膜支架;3个月后进行二期手术,植人人工角膜镜柱.全部手术完成后观察6个月以上.术后抗生素滴眼预防感染,定期观察,照相记录.最终行眼组织病理学检查.并与左眼进行对照.结果 除1只兔在二期术中因麻醉意外死亡外,9只兔均顺利完成手术和术后观察,术后各观察时间点人工角膜均在位,眼表血管化良好,未发生角膜组织融解、房水渗漏、高眼压、感染等严重并发症.组织病理学检查显示:加固的软骨组织均在位,人工角膜支架与周围组织紧密结合,有较活跃的纤维组织增生包绕,角膜炎症反应很轻.对侧眼无异常.结论 国产化人工角膜具有良好的生物相容性和中长期在位稳定性,用耳软骨加固和自体结膜遮盖有助于提高人工角膜稳定性.     

Boston Type I Keratoprosthesis for Treatment of Gelatinous Drop-Like Corneal Dystrophy After Repeated Graft Failure

Abstract

Purpose: To describe the use of a Boston type I keratoprosthesis as a secondary penetrating procedure to treat gelatinous drop-like corneal dystrophy (GDLD), with presentation of pathologic findings, genetic analysis, and discussion of other surgical options. Methods: A 43-year-old woman with GDLD in both eyes, best corrected visual acuity (BCVA) of counting fingers in both eyes, and recurrent corneal opacification following two penetrating keratoplasties presented for visual rehabilitation. A Boston type I keratoprosthesis was implanted in her left eye after extracapsular clear lens extraction. Results: The surgery was uneventful and one month after surgery, best corrected vision improved to 20/30, which has been maintained for a period of more than nine months. At the 12-month visit, her vision was noted to be diminished to 20/200 due to a retroprosthetic membrane and improved to 20/25 two weeks after a Yag capsulotomy. Histopathologic examination of the corneal specimen disclosed predominantly subepithelial amyloid deposition. Genetic analysis is presented. Conclusions: GDLD is a rare disorder of primary corneal amyloidosis. Recurrence of this condition following surgery is very common. Boston type I keratoprosthesis as a secondary procedure can be successful in restoring vision in affected patients.     

Implantation of Iakymenko keratoprosthesis in patients with severe ocular injury

AIM: To present the results of implantation of Iakymenko keratoprosthesis in five patients with vascularized corneal leukoma caused by severe ocular injury. METHODS: Iakymenko keratoprosthesis was implanted into 5 eyes of 5 patients: 4 patients were suffered from chemical burns and 1 patient from explosive injury. The preoperative visual acuity ranged from light perception to hand motion. The implantation surgery was composed of two-stage procedures. The follow-up period was from 9 months to 11 years. The outcome measures were visual acuity, retention, and complications of the keratoprosthesis. RESULTS: Vision improvements were achieved in most patients. All keratoprosthesis were retained within the follow-up period. Corneal melting occurred in one patient and fibrous closure in another patient, both of which were successfully treated. Retinal detachment occurred in one patient after surgery. CONCLUSION: Iakymenko keratoprosthesis seems to be a promising alternative for the patients with severe corneal injury, but further investigation is needed to evaluate the role of Iakymenko keratoprosthesis.     

Outcomes of Boston keratoprosthesis type 1 reimplantation: multicentre study results

Objective

To investigate the visual and anatomical outcomes of Boston keratoprosthesis (Kpro) type 1 reimplantation.

Long‐term visual prognosis of corneal and ocular surface surgery in patients with congenital aniridia

Purpose: To evaluate the long‐term visual prognosis of corneal and ocular surface surgery in patients with congenital aniridia. Methods: Retrospective comparative interventional case series on 88 eyes of 45 patients with congenital aniridia treated and/or operated on from 1956 to present. Corneal and ocular surface findings were identified and patients were classified into operated (group I) or not operated (group II). Long‐term best‐ever best‐corrected visual acuity (BCVA), final BCVA and long‐term delta BCVA (long‐term best‐ever BCVA – final BCVA) were recorded and compared between the two groups, and between the limbal transplant (LT) (group I‐A) and the penetrating keratoplasty (PK) (group I‐B) patients. Postoperative results were also compared. Results: Limbal insufficiency was present in 58% of eyes and dense central corneal opacities were present in 27% of eyes. As a primary surgery, limbal allograft was performed in 10 eyes and PK in 13 eyes. The mean long‐term follow‐up times were 23 years in group I and 16 years in group II. The mean long‐term delta BCVA was 0.032 in group I and 0.028 in group II. Comparisons of the VA means were insignificant (long‐term best‐ever, final BCVA and long‐term delta BCVA). When comparing the LT and PK groups, mean long‐term delta BCVA was 0.0328 in group I‐A and 0.0382 in group I‐B. Mean postoperative delta BCVA was 0.028 in group I‐A and 0.048 in group I‐B. We found no statistical significance between the LT and the PK groups as regards long‐term postoperative BCVA results. Conclusion: Long‐term visual prognosis does not differ whether or not the patient undergoes surgery for aniridic keratopathy. LT and PK have comparable results over 5 years of follow‐up because of the eventual failure of transplanted allografts.     

Penetrating keratoplasty combined with vitreoretinal surgery for severe ocular injury with blood-stained cornea and no light perception

OBJECTIVE: To evaluate the effects of treatment of severe ocular injury with blood-stained cornea and no light perception by combined penetrating keratoplasty and vitreoretinal surgery, and to analyze the relevant factors. METHODS: Records of 7 severely injured eyes of 7 patients with blood-stained cornea and no light perception who underwent penetrating keratoplasty combined with vitrectomy using a temporary keratoprosthesis were evaluated retrospectively. The preoperative visual acuity was no light perception in all injured eyes with a mean intraocular pressure of 3 mm Hg and a range from 2 to 5 mm Hg. The average interval from emergency wound closure to vitrectomy was 18 days with a range from 12 to 21 days. The mean follow-up was 28 months with a range from 26 to 30 months. RESULTS: The postoperative visual acuity was better than light perception in 5 eyes with the best corrected visual acuity from light perception to 0.06. The retina was attached in 5 eyes. The postoperative intraocular pressure ranged from 5 to 15 mm Hg with a mean of 12 mm Hg; it was significantly higher than the preoperative one (p < 0.05). The postoperative complications mainly included temporary intraocular elevation (1 eye), corneal neovascularization (4 eyes), corneal rejection (4 eyes), retinal detachment (2 eyes) and ocular atrophy (2 eyes). CONCLUSION: Penetrating keratoplasty combined with vitrectomy using a temporary keratoprosthesis is a safe and effective method in treating severe ocular injury with blood-stained cornea and no light perception.     

Automated superficial lamellar keratectomy augmented by excimer laser masked PTK in the management of severe superficial corneal opacities

AIM: To assess superficial lamellar keratectomy augmented by excimer laser smoothening with sodium hyaluronate 0.25%, for the management of superficial corneal opacities. METHODS: Consecutive procedure performed in 14 eyes (13 patients) with an automated microkeratome and excimer laser phototherapeutic keratectomy (PTK) smoothening using sodium hyaluronate 0.25%. MAIN OUTCOME MEASURES: UCVA, BCVA, pachymetry, degree of haze, ray tracing analysis, and complications. Mean follow up was 12 (SD 1.6) months. RESULTS: Mean preoperative haze from previous corneal refractive surgeries was 3.5 (SD 0.5) (11/14 cases). In one case, opacity was caused by ocular trauma and in two by infectious keratitis. The mean preoperative UCVA was 0.7 logMAR (0.2 (SD 0.13) decimal value). BCVA was 0.4 logMAR (0.4 (SD 0.17) decimal value). Mean preoperative corneal pachymetry was 508 (SD 62.5) micro m and mean opacity depth measured by corneal confocal microscopy was 115.2 (SD 49.4) micro m. At 6 months, 71.4% of the eyes with previous corneal refractive surgery showed grade I haze or less. Mean postoperative corneal pachymetry at 6 months was 352.36 (SD 49.05) micro m. CONCLUSIONS: Automated superficial lamellar keratectomy combined with excimer laser PTK smoothening assisted by sodium hyaluronate 0.25% induces a significant improvement of corneal transparency and visual acuity in cases of corneal opacity caused by previous refractive surgery, ocular trauma, and keratitis.     

Boston type 1 keratoprosthesis for failed keratoplasty

The purpose of this study was to evaluate the outcomes of the Boston type 1 keratoprosthesis (Kpro-1) in eyes with failed keratoplasty. A retrospective review was performed of every patient treated with a Kpro-1 at a tertiary eye care center between January 1, 2008 and July 1, 2013. Eyes with a failed keratoplasty originally performed for corneal edema, trauma, or keratoconus were included in the statistical analysis. The main outcome measures were visual outcome, prosthesis retention, and postoperative complications. Twenty-four eyes met the inclusion criteria, including 13 eyes with corneal edema, 8 eyes with trauma, and 3 eyes with keratoconus. After a mean follow-up period of 28.9 months (range 7–63 months), the median best corrected visual acuity (BCVA) was 20/125. The BCVA was ≥20/40 in 4 (16.7 %) eyes, ≥20/70 in 9 (37.5 %) eyes, and ≥20/200 in 14 (58.3 %) eyes. Overall, the postoperative BCVA improved in 17 (70.9 %) eyes, was unchanged in 3 (12.5 %) eyes, and was worse in 4 (16.7 %) eyes. The initial Kpro-1 was retained in 22 (91.7 %) eyes, and was successfully repeated in the other 2 eyes. One or more serious prosthesis- or sight-threatening complications occurred in 8 (33.3 %) eyes. These included 1 case of wound dehiscence leading to prosthesis extrusion, 1 case of fungal keratitis leading to prosthesis extrusion, 4 cases of endophthalmitis, and 5 retinal detachments. The Boston Kpro-1 is associated with an excellent prognosis for prosthesis retention and satisfactory visual improvement in eyes with previous failed keratoplasty.     

Boston type 1 keratoprosthesis: the CHUM experience

Objective: To describe the characteristics, indications, complications, and outcomes of the patients who underwent Boston type 1 keratoprosthesis (KPro) surgery at the Université de Montreal affiliated Notre-Dame Hospital.Design: Retrospective case series.Participants: Forty-seven eyes of 43 patients who underwent KPro surgery.Methods: The charts of all patients who underwent KPro surgery at Notre-Dame Hospital between October 2008 and February 2010 were retrospectively reviewed. Preoperative, intraoperative, and postoperative parameters were collected and analyzed.Results: The indication for Boston type 1 KPro was corneal graft failure in 27 eyes; 20 eyes had KPro as a primary procedure. Preoperative diagnoses included aniridia (34%), mechanical trauma (11%), infections (9%), surgery-related bullous keratopathy (9%), chemical burns (9%), corneal dystrophies (9%), and Stevens-Johnson syndrome (2%). A known history of glaucoma was present in 36 eyes (77%). Median preoperative best-corrected visual acuity (BCVA) was hand motion (range, 20/100 to light perception). The assembly of the KPro and surgery were uneventful in all cases. Mean follow-up was 10 ± 5 months. Median BCVA at last follow-up was 20/150 (range, 20/30 to no light perception). The device retention rate was 100% at the end of the follow-up period. Postoperative complications included retroprosthetic membrane in 12 eyes (26%) and glaucoma progression in 11 eyes (23%).Conclusions: Our study demonstrates an excellent retention rate of the Boston type 1 KPro and an improvement of BCVA in the majority of patients. Many patients undergoing KPro surgery have ocular comorbidities that require ongoing care to prevent further vision loss following KPro surgery.     

应用临时人工角膜行前后节联合手术治疗严重眼外伤

目的 比较应用临时人工角膜行玻璃体切割联合穿透性角膜移植术治疗不同类型严重眼外伤的临床效果.方法 对伴有严重角膜混浊的眼外伤患者20例(21只眼),包括爆炸伤11例(12只眼)、眼球穿通伤9例(9只眼).术前视力为光感～眼前手动,采用临时人工角膜代替病变角膜完成闭合式玻璃体切割、白内障切除、球内异物取出、视网膜复位等眼内操作后,再用新鲜供体角膜置换人工角膜.术后随访3～36个月,平均17月,随访视力、眼压、眼球解剖完整性及并发症.结果 全部眼爆炸伤和78%的眼球穿通伤,共19只眼(90%)保存眼球解剖结构完整性.11只眼(52%)保持最佳矫正视力≥0.05,其中眼爆炸伤9只眼(9/12),穿通伤2只眼(2/9).严重影响预后的并发症有持续性低眼压、复发性视网膜脱离,均发生在眼穿通伤.结论 临时人工角膜下行前后节联合手术是治疗伴有严重角膜混浊的外伤眼的惟一有效的方法,眼爆炸伤预后好于眼球穿通伤.     

严重眼球破裂伤无光感眼合并角膜血染的手术治疗

目的 探讨严重眼球破裂伤无光感眼合并角膜血染的手术治疗效果，并分析相关因素。 方法 7例患者7只眼因严重眼球破裂伤无光感合并角膜血染接受2期临时人工角膜下玻璃体切割联合角膜移植手术。2期手术前7只眼均角膜血染，前房及玻璃体积血，视网膜脉络膜脱离。1期与2期手术间隔时间平均18d(12～21d)。手术前视力均无光感，眼压平均3 mm Hg(1mm Hg=0.133 kPa)(2～5 mm Hg)。随访平均时间12个月(6～30个月)。 结果 5只眼恢复光感以上视力，矫正视力从光感至0.05。视网膜复位5只眼(5/7)。眼压平均12 mm Hg(5～15 mm Hg)，明显高于手术前眼压(P＜0.05)。并发症包括一过性高眼压(1 只眼)，角膜新生血管(4只眼)，角膜排斥反应(4只眼)，眼球萎缩(2只眼)。 结论 临时人工角膜下玻璃体切割联合角膜移植手术是挽球严重眼球破裂伤无光感眼合并角膜血染的安全有效的方法。（中华眼底病杂志，2004，20：212-214）     

小切口非超声乳化白内障术切口缝合与否的疗效比较

目的：探讨小切口非超声乳化白内障手术中巩膜切口缝合两针与不缝合的疗效差异。

方法：对420例477眼白内障患者行小切口非超声乳化联合后房型人工晶状体植入术,一字形巩膜隧道切口大小为6～7mm,植入直径5.5mm硬性人工晶状体,切口对称缝合两针者205例230眼(A组),不缝合者215例247眼(B组),术后2d; 3mo观察术眼视力和角膜散光。

结果：术后2d,A、B二组裸眼视力或球镜矫正视力≥0.5者分别为193眼(83.9%)和190眼(76.9%),术后3mo,A、B二组裸眼视力或球镜矫正视力≥0.5者分别为205眼(89.1%)和198眼(80.2%),两组病例不同时期视力差异均有统计学意义(P<0.05); 术后2d; 3mo,A组的平均角膜散光分别为1.53±0.59,1.05±0.43D,B组平均角膜散光分别为1.85±0.97,1.31±0.65D,两组病例术后不同时间平均角膜散光度差异均有统计学意义(P<0.01); A组病例术后无出现切口渗漏、浅前房、虹膜膨出的并发症,B组病例术后有3眼(1.21%)出现切口轻度渗漏、前房稍浅,4眼(1.62%)术后第1d出现上方虹膜膨出并嵌顿于巩膜切口。

结论：小切口非超声乳化白内障手术巩膜切口缝合两针者较不缝合者术后视力好,角膜散光小,手术更安全。     

Combined lens and vitreoretinal surgery in patients with traumatic cataract and intraocular foreign body

AIM: To analyze the postoperative anatomical and functional outcomes as well as complications after combined phacoemul- sification, pars plana vitrectomy (PPV), removal of the intraocular foreign body (IOFB) and intraocular lens (IOL) implantation in patients with traumatic cataract and intraocular foreign body. METHODS: Medical records of 13 patients(13 eyes) with traumatic cataract and IOFB who had undergone combined phacoemulsification, PPV, foreign body extraction and IOL implantation were retrospectively analyzed. The postoperative follow-up ranged from 2 to 12 months. The main measure- ments of outcomes were the extraction success of cataract and intraocular foreign body, intraoperative and postoperative complications and the final best corrected visual acuity (BCVA). ·RESULTS: The mean age of 13 patients(10 male, 3 female )was 36.8 years (range: 17-65 years). All eight IOFBs were removed. Four intraocular lenses were implanted after vitrectomy intraoperatively. In 5 cases, intraocular lenses were implanted during the second operation. Intraocular lenses were not implanted in 4 cases. BCVA at last ranged from 0.8 to hand movement. BCVA was 0.5 or better in four eyes, 0.1 to 0.4 in five eyes, less than 0.1 in four eyes. Intraoperative complications were encountered in 3 patients. They had vitreous hemorrhage. Postoperative complications were encounter- ed in 2 patients. They had retinal detachment. The reoperations of the two patients were successful. CONCLUSION: The combined phacoemulsification, PPV, removal of IOFB and IOL implantation is safe and effective for patients with traumatic cataract and intraocular foreign body. The visual outcome depended primarily on the corneal or scleral wound and underlying posterior segment pathology and sites.