Different techniques of extracapsular cataract extraction: bacterial contamination during surgery

This study was performed to investigate the correlation between the contamination of the anterior chamber and the technique of extracapsular cataract extraction (ECCE). Three different methods were used: uncomplicated planned ECCE, phacoemulsification involving suturing method, and sutureless technique. All patients had posterior chamber intraocular lenses implanted. Two hundred and thirty consecutive patients were included in this prospective study, and preoperative smears of the conjunctiva and intraoperative aspirates of the anterior chamber were investigated. Samples of the aqueous humor were taken at the beginning and at the end of the operation. Cultures were incubated and held for 14 days. More than 71% of the preoperative smears were contaminated by coagulase-negative staphylococci, the most commonly isolated bacteria. However, 27% of the patients had culture-positive anterior chamber aspirates intraoperatively, also with coagulase-negative staphylococci as the most frequent organisms. In no case did postoperative endophthalmitis develop. Preliminary results in a small population show that the contamination of the aqueous humor is statistically significantly less frequent if the cataract extraction is performed by phacoemulsification than if it is done without phacoemulsification. Another interesting finding is that anterior chamber contamination is not significantly more frequent, if a sutureless technique is used for cataract surgery.     

Prospective evaluation of external ocularmicrobial growth and aqueous humor contamination during cataract surgery

Purpose:To analyze the route of aqueous humor contamination leading to thedevelopment of postoperative endophthalmitis.Setting:Department of Ophthalmology, University of Helsinki, Finland.Methods:Forty-nine eyes of 49 patients (31 having phacoemulsification and 18 extracapsularcataract extraction [ECCE]) participated in the study. Four bacterial cultures were taken: preoperative conjunctival swab, lid margin culture, intraoperative lacrimal lake sample, and immediate postoperative anterior chamber fluid sample.Results:Preoperative lid margin cultures were positive in 59.2% of eyes, conjunctival cultures in 69.4%, and lacrimal lake cultures in 24.9%. Four aqueous humor samples (8.2%) showed bacterial growth in the anterior chamber aspirate: 3 in the phacoemulsification and 1 in the ECCE group. The bacteria isolated in this study, Staphylococcus epidermidis and Propionibacterium acnes (2 positive isolates each) were sensitive to the preoperative topical antibiotics used. No aqueous humor sample or any from other locations showed gram-negative microbe growth. The most frequently recovered microbes in all samples collected from the 3 other sources were S epidermidis and other coagulase-negative staphylococcus species, followed by P acnes and other propionibacterium species, Staphylococcus aureus, and diptheroids.Conclusion:The ocular surface significantly contributed fo the transmission ofmicrobes into the eye during cataract surgery. These microbes could not be eradicated by topical preoperative antibiotics. However, no patient developed postoperative endophthalmitis. Natural defense mechanisms appear to fend off a minor inoculum with these microbes of relatively low pathogenicity.     

Bacterial contamination of anterior chamber during IOL surgery

PURPOSE: To study the nature and frequency of bacterial contamination during cataract surgery. METHODS: The preoperative smears from the conjunctiva and anterior chamber (AC) fluid aspirates during extra-capsular cataract surgery (ECCE) with posterior chamber intraocular lens (PCIOL) implantation in 40 eyes were analysed for aerobic and anaerobic bacteria. Any change in the bacterial strains isolated before and after cataract surgery was also studied. RESULTS: AC fluid aspirates were positive for bacteria in 15 eyes (37.5%). Coagulase-negative Staphylococcus was the most common aerobe (39.4%) and Propionibacterium acnes the most common anaerobe. Of the 15 cases with positive AC fluid cultures, 6 showed an organism in the AC aspirate different from the conjunctival smear. CONCLUSION: Clinically there was no endophthalmitis in any of the eyes. Factors such as preoperative antibiotic use, the antibacterial properties of aqueous, or low inoculum size could explain this. The preoperative conjunctival smear may not be useful in predicting the AC fluid contamination or outcome of cataract surgery.     

Evaluation of bacterial contamination rate of the anterior chamber during phacoemulsification surgery using an automated microbial detection system

AIM:To assess the incidence of anterior chamber bacterial contamination during phacoemulsification surgery using an automated microbial detection system (BacT/Alert).METHODS:Sixty-nine eyes of 60 patients who had uneventful phacoemulsification surgery, enrolled in this prospective study. No prophylactic topical or systemic antibiotics were used before surgery. After antisepsis with povidone-iodine, two intraoperative anterior chamber aqueous samples were obtained, the first whilst entering anterior chamber, and the second at the end of surgery. BacT/Alert culture system was used to detect bacterial contamination in the aqueous samples.RESULTS: Neither aqueous samples obtained at the beginning nor conclusion of the surgery was positive for microorganisms on BacT/Alert culture system. The rate of bacterial contamination during surgery was 0%. None of the eyes developed acute-onset endophthalmitis after surgery.CONCLUSION:In this study, no bacterial contamination of anterior chamber was observed during cataract surgery. This result shows that meticulous surgical preparation and technique can prevent anterior chamber contamination during phacoemulsification cataract surgery.     

The effect of intraoperative antibiotics in irrigating solutions on aqueous humor contamination and endophthalmitis after phacoemulsification surgery

PURPOSE: To determine the efficacy of intraoperative antibiotic use in irrigating solutions on aqueous humor contamination during phacoemulsification surgery and to evaluate the corresponding risk of postoperative endophthalmitis. METHODS: 644 eyes of 640 patients who underwent phacoemulsification surgery with foldable intraocular lens (IOL) implantation were included in this study. Preoperative conjunctival smears were taken and eyes were allocated to receive irrigating infusion fluid containing either balanced salt solution (BSS)-only (group 1; 322 eyes) or BSS with antibiotics (vancomycin and gentamycin) during surgery (group 2; 322 eyes). Bacterial contamination rates of aqueous humor samples taken in the beginning and at the end of operation were compared. Predictive factors for the development of postoperative endophthalmitis were determined by clinical and microbiologic analyses. RESULTS: The rates of culture-positivity were similar between group 1 and group 2 for both preoperative conjunctival smears and aqueous samples (p > 0.05). Aqueous samples taken at the end of operation were found to be contaminated in 68 (21.1%) eyes in group 1 and 22 (6.8%) eyes in group 2, and the difference was significant (p = 0.0001; OR = 3.65 (2.1-6.0)). Capsular rupture was associated with higher rate of contamination in both groups (p = 0.0001; OR = 7.7 and p = 0.0001; OR = 8.1). Two eyes in the BSS-only group developed postoperative endophthalmitis and these cases had posterior capsular rupture during the surgery and culture-positivity for staphylococcus epidermidis throughout the study. CONCLUSIONS: Intraoperative antibiotic irrigation decreases aqueous humor contamination during phacoemulsification. Further studies are warranted to determine the interrelationship between aqueous humor contamination and endophthalmitis in eyes with posterior capsular rupture.     

Microbiologic analysis of aqueous humor in phacoemulsification.

PURPOSE: This study was designed as a microbiologic survey of the fluids aspirated from the anterior chamber at the end of cataract extraction performed by phacoemulsification, and to correlate the contamination rate of the anterior chamber to the surgical technique used. METHODS: One hundred and one consecutive patients (126 eyes) who underwent cataract extraction by phacoemulsification and posterior chamber intraocular lens implantation were included in the study. Microscopical examination, culture, and determination of the number of colonies were carried out on the bacteria and fungi in the anterior chamber fluids aspirated at the end of surgery, before final suture placement. RESULTS: Anterior chamber fluids yielded positive cultures in nine specimens (8.14%), six of which were identified as coagulase-negative staphylococci. Quantification disclosed colony counts ranging between 2-10 and 10-40 per mL. CONCLUSIONS: Preliminary results in a small population show that the contamination of the aqueous humor is significantly less frequent if the cataract extraction is performed by phacoemulsification.     

Bacterial contamination in the anterior chamber after povidone-iodine application and the effect of the lens implantation device

PURPOSE: To assess the incidence of anterior chamber bacterial contamination during cataract surgery, and compare results of injector implantation and forceps implantation of foldable intraocular lenses (IOLs). SETTING: Department of Ophthalmology and Institute of Medical Microbiology, Semmelweis University, Budapest, Hungary. METHODS: This prospective randomized controlled clinical study comprised 97 eyes of 96 patients. Antibiotic eyedrops were not used; however, povidone-iodine 10% solution was used to prepare the eyebrow and eyelids and povidone-iodine 5% to disinfect the ocular surface. A Steri-Drape (3M) was used to surround the eye. Aqueous fluid samples were aspirated from the anterior chamber at the beginning and the end of surgery. The samples were cultured for 14 days under aerobic and anaerobic conditions simultaneously. Cataract surgery was performed using a sutureless, superotemporal, clear corneal phacoemulsification technique. The IOL was implanted with an injector (n = 47) or a forceps (n = 50), with the instrument randomly selected. The frequency of positive bacterial cultures with each implantation method was compared using the Fisher exact test. RESULTS: Bacteria were found in the conjunctival samples in 21 eyes (21.65%) before povidone-iodine application and in 4 eyes (4.12%) after disinfection. The anterior chamber sample before surgery was culture positive for Staphylococcus epidermidis in 2 eyes and for Micrococcus luteus in 1 eye. After surgery, the culture was positive for S epidermidis in 1 eye (2.15%) in the injector group and 1 eye (2.00%) in the forceps group (P = .74). Neither sample came from an eye that had a positive culture preoperatively. There were no intraoperative complications. CONCLUSIONS: In uneventful clear corneal phacoemulsification, meticulous technique can prevent antibiotic use during surgery. No difference in anterior chamber bacterial contamination was found between IOL implantation using an injector or a forceps.     

全景超声活体显微镜对超声乳化白内障吸除术后前房结构改变的临床观察

目的 利用全景超声活体显微镜观察超声乳化白内障吸除术后前房结构的改变.方法 对年龄相关性白内障患者行超声乳化白内障吸除术前后的前房结构进行活体测量.81例(102只眼)年龄相关性白内障患者行超声乳化白内障吸除联合折叠型人工晶状体植入术,分别于术前、术后2个月利用全景超声活体显微镜测量前房水平、垂直直径及前房深度;并对其中32例患者(36只眼)测量颞侧前房角宽度.采用配对t检验及两个独立样本的t检验对相应数据进行统计学分析.结果 大部分患者术前术后前房垂直直径大于水平直径;全部患者术后2个月水平前房直径与术前相比明显增大(t=7.10,P<0.01),并与术前呈显著正相关(r=0.801,P<0.01).前房深度与术前相比明显加深(t=39.97,P<0.01),术后2个月前房深度与术前的比值与术前深度呈显著负相关(r=-0.864,P<0.01).32例患者(36只眼)术后2个月颞侧房角500μm处前房角开放距离(AOD500)和小梁虹膜夹角(TIA 500)较术前均显著增大,且比值(术后AOD 500/术前AOD500、术后TIA500/术前TIA 500)均分别与术前旱显著负相关(r=-0.763,-0.791;P<0.01).结论 大部分患者前房垂直直径大于水平直径;年龄相关性白内障患者行超声乳化白内障吸除联合人工晶状体植入术后前房直径增加,虹膜膈后移,前房深度、房角宽度增加.     

白内障超声乳化联合房角分离术治疗闭角型青光眼

目的：分析白内障超声乳化吸出+人工晶状体植入联合房角分离术治疗闭角型青光眼的临床效果。

方法：回顾性分析合并有白内障的闭角型青光眼患者,且房角关闭粘连范围≤180°的患者46例56眼,行白内障超声乳化吸出+人工晶状体植入联合房角分离手术,观察分析术前和术后眼压、视力、前房深度、前房角的变化。

结果：术后眼压全部控制在21mmHg(1mmHg=0.133kPa)以下,最佳矫正视力均有不同程度的提高,前房深度明显增加,房角均有不同程度开放。术中、术后无严重手术并发症。术前和术后眼压、前房深度、最佳矫正视力差异有统计学意义(P<0.05)。

结论：选择对合适的闭角型青光眼合并白内障的患者施行白内障超声乳化联合房角分离手术能够获得满意的临床效果。     

Intraocular contamination during extracapsular cataract extraction with intraocular lens implantation

Ocular bacterial contamination has been studied in 45 eyes that underwent cataract surgery. The following samples were taken: (1) eyelid margin swab; (2) conjunctival swab; (3) aqueous humor after initial anterior chamber penetration; (4) anterior capsule fragment after capsulorrhexis or capsulotomy; (5) cortical lens material; (6) anterior chamber fluid after lens implantation. The percentages of contaminated samples were 15.5, 13.3, 0.0, 11.1, 13.3 and 6.6, respectively. There was a significant difference between the incidence of positive cultures in the aqueous humor at the time of incision and in subsequent intraocular samples. Positive cultures were found in 13 out of 45 eyes, only gram-positive organisms were recovered and coagulase-negative staphylococci were the most common (78.5% of the isolates). These results confirm previous reports on intraocular contamination during cataract surgery.     

使用全景超声生物显微镜观察年龄相关性白内障超声乳化手术后前房直径的改变

目的探讨使用全景超声生物显微镜（ultrasound biomicroscopy,UBM）观察白内障患者手术前后前房直径的改变。方法对109例（128眼）年龄相关性白内障患者行超声乳化白内障吸除联合折叠型人工晶状体植入术,分别于术前、术后第2个月利用全景UBM测量水平前房直径和垂直前房直径,观察其变化情况。结果年龄相关性白内障患者术前水平前房直径为（11.58±0.43）mm,术后为（11.82±0.35）mm;术前垂直前房直径为（11.59±0.44）mm,术后为（11.87±0.33）mm。术前垂直前房直径与水平前房直径相差（0.01±0.23）mm,术后相差（0.06±0.25）mm。术后水平、垂直前房直径均较术前增加,差异有统计学意义（P〈0.01）。术前与术后水平前房直径存在正相关（r=0.68,P〈0.01）,回归方程为Y=5.3945＋0.55438x。结论白内障患者垂直前房直径略大于水平前房直径;年龄相关性白内障超声乳化吸除人工晶状体植入术后水平前房直径及垂直前房直径均增加。可以用术前的前房直径预测出术后前房直径,为选择适合大小的前房型人工晶状体提供参考。     

白内障人工晶状体植入术前后角膜厚度和前房深度及前房角的改变

目的:探讨超声乳化白内障吸除折叠式人工晶状体植入术前后,术眼前房深度和角膜厚度及前房角结构的改变。方法:对20例20眼老年性白内障患者行超声乳化白内障吸除折叠式人工晶状体植入术,分别于术前和术后1wk使用超声生物显微镜量化测量前房深度、角膜厚度和前房角宽度。结果:全部患者术后1wk角膜厚度明显增加,前房深度明显增大;500μm处前房角开放距离(AOD500)及ACA角度均与术前值比较明显增加,且均P<0.01。结论:超声乳化白内障吸除折叠式人工晶状体植入术可以使角膜厚度显著增加;可显著增加老年性白内障患者的前房深度及房角宽度。     

Endophthalmitis after phakic intraocular lens implantation to correct high myopia.

A 36-year-old woman had uneventful implantation of an angle-supported anterior chamber phakic intraocular lens (IOL) to correct high myopia. On the first postoperative day, she developed infectious endophthalmitis likely associated with intraoperative contamination. Group B beta-hemolytic Streptococcus endophthalmitis was confirmed by microbiologic studies. To our knowledge, this is the first documented case of infectious endophthalmitis after anterior chamber phakic IOL implantation to correct high myopia.     

Clinical Analysis of Cataract Surgery Complicated by Endophthalmitis

Purpose:.To assess the efficacy of vitrectomy combined with intravitreal injection in the treatment of endophthalmitis after phacoemulsification and IOL implantation. Methods:.Five patients.(5 eyes),.who had undergone conventional phacoemulsification combined with IOL implantation at another treatment facility,.presented with endophthalmitis. The subjects ranged in age from 41 to 79 years (65.8±0.5 years on average),.and three were male..All five cases received bacterial culture susceptibility testing..On the basis of the treatment of primary disease, 3 cases had anterior chamber irrigation,.and posterior vitrectomy followed by intravitreal injection of 1 mg vancomycin plus 2.25 mg ceftazidime. Results:.Four out of the five cases of endophthalmitis had a positive bacterial culture testing results.(two cases of staphylococcus epidermidis,.one case of enterococcus faecalis and one case of head-like staphylococcus),.and the remaining case had no bacterial growth..Four cases showed restored visual acuity,.clear vitreous cavity,.and no retinal detachment or other complications. Conclusion: Management of patients presenting with endophthalmitis subsequent to cataract surgery should include: prompt bacterial culture and drug sensitivity tests, and where appropriate, vitrectomy combined with intravitreal injection of vancomycin.     

Longterm results after phacovitrectomy and foldable intraocular lens implantation

Purpose: This study aimed to evaluate the longterm results of phacovitrectomy and foldable intraocular lens (IOL) implantation in eyes with significant cataract and co‐existing vitreoretinal diseases. Methods: We carried out a retrospective study of 186 eyes of 149 patients with various vitreoretinal abnormalities and visually significant cataracts. Vitreoretinal surgery was combined with phacoemulsification and foldable IOL implantation. Main outcome measures were visual acuity (VA), preoperative data, and intraoperative and postoperative complications. Results: The most common indications for surgery were non‐diabetic vitreous haemorrhage and proliferative diabetic retinopathy. Preoperative vision ranged from 0.6 to light perception; postoperative vision ranged from 1.2 to no light perception. Postoperatively, in 162 eyes (87.1%) VA improved by ≥ 3 lines on the decimal chart. In 14 eyes (7.5%), vision remained within 3 lines of preoperative levels and in 10 eyes (5.3%), vision had decreased by the last follow‐up. Postoperative complications included elevated intraocular pressure and posterior capsule opacification, corneal edema, macular edema, fibrinous reaction, vitreous hemorrhage, corneal epithelial defects, anterior chamber hyphema, choroidal detachment, persistent macular hole, posterior synechiae, recurrent retinal detachment, rubeosis iridis, neovascular glaucoma. Conclusions: Combined vitreoretinal surgery and phacoemulsification with foldable IOL implantation is safe and effective in treating vitreoretinal abnormalities co‐existing with cataract. Based on extensive experience with the combined procedure, we suggest that combined surgery is recommended in selected patients with simultaneous vitreoretinal pathological changes and cataract.     

Intraocular bacterial contamination during sutureless, small incision, single-port phacoemulsification

PURPOSE: To evaluate the incidence of anterior chamber bacterial contamination during no-stitch, 1-handed, small incision phacoemulsification. SETTING: Little Company of Mary Hospital, Evergreen Park, Illinois, USA. METHODS: This study comprised 53 eyes of 46 patients. Topical gentamicin sulfate was administered 1 hour preoperatively. After povidone-iodine cleansing solution and povidone-iodine paint (5% and 10%) were applied, the eyes were draped in a sterile manner. Aqueous fluid was aspirated upon entering the anterior chamber and at the end of surgery; the specimens were cultured for up to 14 days. All eyes had no-stitch, 1-handed, small incision phacoemulsification with implantation of a foldable acrylic posterior chamber intraocular lens through a 3.5 mm scleral tunnel incision. RESULTS: Three specimens (5.7%) aspirated on entry into the anterior chamber were positive for microorganisms. Of the cultures obtained at the end of surgery, 4 (7.5%) were positive for microorganisms. All posterior lens capsules were intact. The following organisms were cultured at the end of phacoemulsification: alpha-streptococci, micrococci, saprophytic mold, alpha-viridans streptococci, coagulase-negative Staphylococcus species, and anaerobic positive cocci. No eye developed endophthalmitis. CONCLUSIONS: The incidence of anterior chamber bacterial contamination was low. Bacterial contamination of the anterior chamber occurred at the beginning and toward the end of phacoemulsification. Staphylococcus species was the most common organism in the beginning, while Streptococcus species was the most common at the end. Saprophytic mold was present only at the end. No eye developed endophthalmitis.     

Cataract surgery in highly myopic eyes corrected by phakic anterior chamber angle-supported lenses(1)

PURPOSE: To assess the incidence of cataract, potential causes of its development, and the outcome of cataract surgery after previous implantation of phakic angle-supported anterior chamber intraocular lenses (AC IOLs) in highly myopic patients. SETTING: Instituto Oftalmológico de Alicante, Department of Refractive Surgery, Spain. METHODS: Two hundred sixty-three highly myopic phakic eyes of 160 patients had implantation of a phakic AC IOL. Follow-up was up to 8 years (range 38.4 to 103.2 months). Eyes that subsequently developed cataract had cataract extraction and were studied during follow-up for clinical association to other preoperative or postoperative data. Cataract surgery was performed after phakic IOL explantation by phacoemulsification and posterior chamber IOL (PC IOL) implantation (Domilens-Chiron AL3). RESULTS: Nuclear cataract developed in 9 cases (3.42%) a mean of 42.91 months +/- 17.7 (SD) after phakic AC IOL implantation. Final best spectacle-corrected visual acuity (BSCVA) was not significantly different from that after phakic AC IOL implantation (P =.25, paired Student t test). Mean endothelial cell loss after cataract surgery was 6.87% +/- 0.42% cells/mm(2). Age at implantation of older than 40 years and axial length greater than 30. 0 mm were the 2 factors significantly related to nuclear cataract development (r = 1.69 and 1.98, respectively; P <.05). CONCLUSIONS: There is a potential risk of nuclear cataract development after phakic AC IOL implantation to correct high myopia in patients older than 40 years and with very high (greater than 30.0 mm) axial myopia. Phakic IOL explantation, phacoemulsification, and PC IOL implantation successfully resolved this complication. The benefits in terms of BSCVA and spherical equivalent obtained after phakic AC IOL implantation were preserved after cataract surgery.     

原发性闭角型青光眼行超声乳化联合房角分离术后房角改变

目的:观察白内障超声乳化吸除并人工晶状体植入联合房角分离术治疗合并有白内障的原发性闭角型青光眼术前术后房角的改变。方法:回顾性分析合并有白内障的闭角型青光眼患者35例(37眼),其中前房角关闭范围≤180°者16眼,>180°者21眼,均在表面麻醉下行角巩膜隧道切口行白内障超声乳化吸除折叠式人工晶状体植入联合房角分离术,对其手术前后的房角状态,眼压,中央前房深度,视力进行对照观察。结果:随访3～24mo术后房角状态与术前比有3眼大部分开放,余房角均开放,随访期内未见房角关闭及粘连范围扩大,末次随访平均眼压(14.3±4.1)mmHg,较术前用药后平均眼压(26.4±3.2)mmHg明显降低,差异具有统计学意义(t=5.86,P<0.01),中央前房深度由术前的(2.0±0.3)mm,增加到术后的(3.2±0.4)mm,视力除2眼有视神经萎缩外,余均有不同程度提高。结论:对于合并有白内障的闭角型青光眼的治疗,行白内障超声乳化吸除折叠式人工晶状体植入联合房角分离术治疗能有效地降低眼压,开放房角,加深前房,提高视力,与滤过性手术相比,手术并发症少,是有效且安全的手术方法。     

Bacterial contamination: epidemiology in cataract surgery

PURPOSE: To evaluate anterior chamber (AC) bacterial contamination at the end of cataract surgery in a large series of patients, to determine the influence of operative technique on ocular contamination. METHODS: Retrospective study of 2,624 patients undergoing cataract extraction, 354 extracapsular cataract extraction (ECCE) and 2,270 phacoemulsification. Anterior chamber aspirates were performed on completion of surgery for microbiological studies. RESULTS: One hundred and thirty two patients (5%) had culture-positive anterior chamber aspirates. Coagulase-negative Staphylococcus, Propionibacterium sp. and Corynebacterium sp. were the most commonly isolated organisms. The AC contamination rates during ECCE (5.6%) and phacoemulsification (4.7%) were not statistically different. There was a statistically significantly higher risk of AC contamination in eyes receiving an intraocular lens (IOL) with polypropylene haptics (9.9%) than in eyes receiving the same IOL with polymethylmethacrylate haptics (4.4%). CONCLUSION: Surgical technique had no statistically significant effect on ocular contamination. Polypropylene haptics IOLs were associated with a higher risk of bacterial contamination.     

超声生物显微镜量化观察超声乳化白内障吸除人工晶状体植入术后前房角的改变

目的　探讨超声乳化白内障吸除折叠式人工晶状体植入术后术眼前房角结构的改变。方法　对 4 6例 (5 0只眼 )老年性白内障患者行小切口超声乳化白内障吸除折叠式人工晶状体植入术 ,分别于术前和术后 1个月使用超声生物显微镜量化测量前房深度和前房角宽度。结果　全部患者术后 1个月前房深度明显增大 (P <0 0 1) ;5 0 0 μm处小梁虹膜夹角 (TIA5 0 0 )、2 5 0 μm和 5 0 0 μm处前房角开放距离 (AOD2 5 0、AOD5 0 0 )与术前比较均显著增大 (均P <0 0 1) ,TIA5 0 0平均比值 (术后TIA5 0 0 /术前TIA5 0 0 )为 1 6 5 (1 12～ 4 91) ,AOD2 5 0平均比值 (术后AOD2 5 0 /术前AOD2 5 0 )为1 81(1 0 6～ 2 6 7) ,AOD5 0 0平均比值 (术后AOD5 0 0 /术前AOD5 0 0 )为 1 6 5 (1 0 1～ 2 76 ) ,均与术前值呈显著负相关 (均P <0 0 1)。结论　超声乳化白内障吸除折叠式人工晶状体植入术可显著增大老年性白内障患者的前房角宽度 ;术前前房角越窄 ,术后前房角的变化程度越大。