减少Nd:YAG激光后囊膜切开术人工晶状体损伤的探讨

目的　探讨减少或避免 Nd:YAG激光后囊膜切开术人工晶状体 (IOL )损伤的方法。方法　对 2 5 2例(2 6 1只眼 ) IOL眼晶状体后囊膜混浊 (posterior capsule opacity,PCO)患者行 Nd:YAG激光后囊膜切开术。采用环行切开后推膜瓣法或十字形切开法。平均单脉冲能量 (2 .35± 0 .38) m J,平均脉冲次数 (2 9± 10 .2 1)次 ,平均总能量(6 8.15± 11.0 2 ) m J。平均随访 (13± 5 )个月。结果　截囊成功率 10 0 %。发生 IOL损伤 12只眼 (4 .6 % ) ,均为轻度损伤。 1、2级 PCO和较薄的 PCO未发生 IOL损伤。结论　掌握激光手术时机及操作技巧是减少或避免 Nd:YAG激光后囊膜切开术 IOL损伤的关键     

后发性白内障治疗前后对1CU可调节人工晶状体移动度的影响

背景 后发性白内障的发生使1CU可调节人工晶状体(1CU AIOL)的拟调节力及远近视功能明显下降,影响其远期临床效果.目前国内外关于后发性白内障对IOL眼内移动度的影响及Nd∶YAG激光后囊膜切开术后是否可恢复IOL眼内移动度的研究报道较少. 目的 探讨后发性白内障及Nd∶YAG激光后囊膜切开术对1CU AIOL眼内移动度的影响.方法 采用系列病例观察试验设计.收集因单纯性白内障行白内障超声乳化摘出术联合1CU AIOL植入术后发生后发性白内障者20例24眼,分别于IOL植入术后3个月、Nd:YAG激光后囊膜切开术前1d、Nd∶YAG激光后囊膜切开术后3个月进行随访观察,检测术眼最佳矫正远视力下的近视力(DCNVA),并用IOL Master检测10 g/L匹罗卡品滴眼液点眼前及点眼后的前房深度,计算其差值作为IOL的眼内移动度.比较上述3个时间点IOL的眼内移动度变化,评价后发性白内障及激光治疗对1CU AIOL眼内移动的影响. 结果 1CU AIOL植入术后3个月IOL的眼内移动度为(0.44±0.21)mm,发生后发性白内障后,术眼行Nd:YAG激光后囊膜切开术前1 d IOL的眼内移动度为(0.27±0.11)mm,Nd:YAG激光后囊膜切开术后3个月IOL的眼内移动度为(0.34±0.10)mm,3个时间点间IOL的眼内移动度差异有统计学意义(F=7.180,P=0.001),与IOL植入术后3个月比较,Nd∶YAG激光后囊膜切开术前1d IOL的眼内移动度明显下降,差异有统计学意义(P=0.006);与后囊膜切开术前1d相比,Nd∶YAG激光后囊膜切开术后3个月IOL的眼内移动度略有增加,但差异无统计学意义(P=0.059).1CU AIOL植入术后3个月术眼DCNVA为(3.1±0.9)J,Nd∶YAG激光后囊膜切开术前1d为(6.2±0.8)J,Nd∶YAG激光后囊膜切开术后3个月为(3.4±0.7)J,3个时间点间的差异有统计学意义(F=110.270,P=0.000),其中Nd∶YAG激光后囊膜切开术前1d术眼DCNVA明显低于IOL植入术后3个月,差异有统计学意义(P＜0.05),与后囊膜切开术前1d相比,Nd∶YAG激光后囊膜切开术后3个月术眼DCNVA明显增加,差异有统计学意义(P＜0.05).IOL植入术后3个月、Nd∶YAG激光后囊膜切开术前1d、Nd∶YAG激光后囊膜切开术后3个月DCNVA与1CU AIOL的眼内移动度均无显著的相关性(r1=-0.150,P1=0.486;r2 =-0.320,P2=0.122:r3=-0.100,P3=0.633). 结论 后发性白内障使1CU AIOL的眼内移动度明显下降,Nd∶YAG激光后囊膜切开术对IOL的移动度并无明显影响,但术后术眼仍可恢复较好的视近功能,可能与多种因素产生的拟调节有关.     

两种Nd:YAG激光后囊切开方式对不同材料人工晶状体损伤的观察

目的观察Nd:YAG激光后囊膜切开方式对不同材料的人工晶体(IOL)损伤的情况。方法对86例(124只眼)IOL眼晶状体后囊膜混浊(posterior capsule opacity,PCO)患者随机分为两组行Nd:YAG激光后囊膜切开术。A组64眼采用环行切开后推膜瓣法,人工晶体包括:PMMA23眼、疏水性丙烯酸26眼、硅凝胶15眼。B组60眼行十字形切开法,人工晶体包括:PMMA21眼、疏水性丙烯酸25眼、硅凝胶14眼。术前术后常规眼前段检查、测视力、眼压。结果截囊成功率100%。发生IOL损伤16眼,其中A组6眼(9.38%),B组10眼(16.67%),两种方式对相同材料的人工晶体损伤的机率相似(均p>0.05),不同材料的耐受强弱依次为PMMA、疏水性丙烯酸、硅凝胶,均为轻度损伤。结论两种方式对不同材料损伤的机率依次为硅凝胶、疏水性丙烯酸、PMMA,但环行切开后推膜瓣法可以减少Nd:YAG激光后囊膜切开术IOL损伤机率。     

掺钕钇铝石榴石激光后囊膜混浊切开对人工晶状体眼波前像差的影响

目的研究掺钕钇铝石榴石(Nd:YAG)激光后囊膜混浊切开对人工晶状体(IOL)眼波前像差的影响。方法对57例(68眼)白内障超声乳化吸除加IOL植入术后后囊膜混浊(PCO)患者行Nd:YAG激光后囊膜切开,激光前后应用NidekOPDScanⅠ角膜地形图/波前像差仪测量瞳孔直径为5.0mm时IOL眼的总像差、总高阶像差、球差、彗差和三叶草像差的均方根值(RMS),比较Nd:YAG激光前后波前像差的变化。Nd:YAG激光后囊膜切开采用环形切开向后翻转法,切开后囊膜瓣直径为5.0mm。结果激光术后最佳矫正视力较术前提高,差异有统计学意义(P<0.05)。激光术后总像差、总高阶像差、球差、彗差和三叶草像差的RMS分别为1.849±0.763、0.605±0.247、0.238±0.146、0.166±0.112及0.322±0.132,均较术前下降,差异有统计学意义(P<0.05)。结论 Nd:YAG激光后囊膜混浊切开直径5.0mm可以明显降低IOL眼的波前像差,改善视觉质量。     

后发性白内障及Nd∶YAG激光后囊膜切开对1CU可调节人工晶状体调节功能的影响

目的探讨后发性白内障及Nd∶YAG激光后囊膜切开术对1CU可调节人工晶状体调节功能的影响。方法回顾性病例研究。收集20例（24眼）白内障超声乳化联合1CU可调节人工晶状体植入术后发生后发性白内障的患者,分别于人工晶状体植入术后3个月、Nd∶YAG激光后囊膜切开术前1 d、Nd∶YAG激光后囊膜切开术后3个月随访,检测裸眼远视力、最佳矫正远视力（5 m）,以及远视力矫正下的中（50 cm）、近距离视力（33 cm）,并分别用主觉近点法、离焦法检测术眼调节幅度。各时期的检测数据用重复测量资料的方差分析进行检验。结果1CU可调节人工晶状体植入术后3个月、行Nd∶YAG激光后囊膜切开术前1 d、切开术后3个月,术眼裸眼远视力（F=108.87,P＜0.01）、最佳矫正远视力（F=116.97,P＜0.01）、远视力矫正下的中距离视力（F=79.89,P＜0.01）、远视力矫正下的近视力（F=118.84,P＜0.01）,以及近点法和离焦法检测的调节幅度（F=81.78,P＜0.01）差异均有统计学意义。行Nd∶YAG激光后囊膜切开术前1 d均较植入术后3个月时降低,Nd∶YAG激光后囊膜切开术后3个月,远、中、近距离视力及调节幅度明显改善,其差异均有统计学意义。2种调节幅度检查方法测量值之间的差异无统计学意义（F=0.272,P＞0.05）。结论后发性白内障的发生使1CU可调节人工晶状体植入术后术眼调节功能明显下降,Nd∶YAG激光后囊膜切开术后术眼调节功能恢复。     

后囊膜混浊的Nd:YAG激光治疗

目的：探讨Nd:YAG激光后囊膜切开的方法，疗效及并发症。方法：回顾性分析了108例112只眼用Nd:YAG激光切开混浊后囊膜的病例，并记录了视力，眼压的变化和并发症的发生情况，结果；所有病例都成功切开后囊膜，视力提高，裸眼平均视力由术前0.2增加到术后0.5，平均矫正视力达到0.7,30.3%的眼内人工晶状体出现激光损伤斑，无人工晶状体移位；眼压出现一过性升高；随访中发现2例视网膜脱离，结论：Nd:YAG激光后囊膜切开操作容易，安全，疗效好，并发症少。     

Nd:YAG激光后囊膜切开术对人工晶状体位置的影响:基于CASIA2的研究

目的　使用新型眼前节OCT CASIA2评估Nd:YAG 激光后囊膜切开术治疗后囊膜混浊（PCO）对人工晶状体（IOL）稳定性的影响。方法　前瞻性自身对照研究。纳入于川北医学院附属医院眼科诊断为PCO拟行Nd:YAG激光后囊膜切开术的患者，分别于激光前、激光后1 h、激光后1个月进行视力、眼压、眼前节和眼底检查，并使用CASIA2测量IOL倾斜和偏心的大小、方向，以及前房深度（ACD）。结果　本研究共纳入33例33眼患者，裸眼视力和最佳矫正视力分别从激光前的（0.771±0.375）logMAR和（0.608±0.369）logMAR提高到激光后1个月的（0.347±0.271）logMAR和（0.094±0.095）logMAR（均为P<0.001）。散瞳状态下，激光前、激光后1 h、激光后1个月IOL的倾斜度分别为（4.482±1.408）°、（4.541±1.343）°、（4.458±1.399）°,IOL的偏心量分别为（0.176±0.107）mm、（0.193±0.117）mm、（0.180±0.114）mm。激光前与激光后相比，IOL倾斜度和偏心量的差异均无统计学意义（均为P>0.05）。散瞳与非散瞳状态比较，IOL倾斜度和偏心量的差异均无统计学意义（均为P>0.05）。散瞳状态下ACD激光前为（3.842±0.278）mm，激光后1 h增加了0.019 mm，激光后1个月增加了0.012 mm，激光前后ACD相比,差异均有统计学意义（均为P<0.05）。结论　Nd:YAG激光后囊膜切开术是治疗PCO安全有效的方法，术后患眼视力显著提高，手术对IOL倾斜和偏心无明显影响，但可能造成IOL一定程度的轴向移位。     

Nd:YAG激光松解切开术治疗晶状体后囊膜皱褶

目的:探讨Nd:YAG激光松解切开术治疗晶状体后囊膜皱褶的效果。方法:术前爱尔卡因表面麻醉下置CGP角膜接触镜,借助瞄准光,准确聚焦于皱褶上,发射Nd:YAG激光,单脉冲松解皱褶能量为0.4～1.0mJ,每次治疗总量为20～30(平均24.00±0.0625)mJ。结果:后囊膜皱褶激光松解切开术后矫正视力1.0者31眼(58%),0.6～0.8者17眼(32%),0.4～0.5者5眼(9%)。裂隙灯下观察未发生人工晶状体损伤,无玻璃体疝、黄斑囊样水肿或视网膜脱离等并发症。结论:用Nd:YAG激光松解切开术治疗晶状体后囊膜皱褶,可增进视力,疗效良好。     

白内障超声乳化术三种人工晶状体植入疗效分析

目的 观察PMMA晶状体及三片式、单片式Acrysof晶状体植入后视力恢复、散光度、角膜内皮细胞密度变化、术后后囊膜混浊发生率及Nd：YAG激光切开率。方法 对PMMA晶状体组55只眼、三片式、单片式Acrysof晶状体各52只眼进行回顾性研究，将术后各期视力、散光度、角膜内皮细胞密度变化和后囊膜混浊发生率及激光切开率进行对比研究。结果 折叠式人工晶状体组比PMMA晶状体组视力恢复快。1月后三者间没有差异。角膜散光PMMA晶状体组6个月与术前无差异，折叠式人工晶状体组1个月与术前比较即无差异。术后角膜内皮细胞密度三组之间无差异。术后6月后囊膜混浊发生率及Nd：YAG激光后囊膜切开率，折叠式人工晶状体组与PMMA晶状体差异有显著意义。结论 三种不同人工晶状体植入后均可获得满意的效果，Acrysof晶状体术后后发障明显低于PMMA晶状体。     

Q开关Nd:YAG激光治疗后囊膜混浊

目的:探讨Q开关Nd:YAG激光后囊膜切开术治疗后囊膜混浊的疗效及安全性。方法:回顾性分析行Q开关Nd:YAG激光后囊膜切开术后囊膜混浊患者165例(193眼),记录手术前后视力、眼压及并发症,并进行统计学分析。结果:①后囊膜一次性切开成功率为100%,所用激光脉冲数平均24±21.7次,激光总能量4~451mJ;②91.2%(176眼)视力较术前提高;③59.6%(115眼)出现一过性眼压升高;手术前后眼压变化与是否植入人工晶状体、所用激光脉冲数以及白内障手术与后囊膜切开术间隔时间有关;④19.3%(32眼)出现人工晶状体损伤。结论:Q开关Nd:YAG激光后囊膜切开术治疗后囊膜混浊安全、有效,但应严格掌握适应证,并合理选择激光参数。     

两种Nd:YAG激光后囊膜切开方式治疗后囊膜混浊的Meta分析

目的：系统评价两种Nd：YAG激光后囊膜切开方式治疗白内障术后后囊膜混浊的效果与安全性,为临床实践中后囊膜切开方式的选择提供可靠依据。

方法：计算机检索中文全文期刊数据库(CNKI)、万方数据库、维普数据库、PubMed、Medline、Cochrane Library搜集不同Nd：YAG激光后囊膜切开方式治疗后囊膜混浊的相关文章,检索时限定义为2000-01-01/2019-12-31,2位评价者独立进行文献检索、筛选、质量评价及数据提取,采用RevMan5.3软件进行Meta分析。以均值差(MD)与95%置信区间(CI)衡量计量资料的效应量,对术后最佳矫正视力(BCVA)、术后眼压、激光使用能量进行合并分析。以比值比(OR)衡量计数资料的效应量,对出现人工晶状体受损以及眼前黑影飘动的比例进行合并分析。

结果：共纳入7篇研究,包括行Nd：YAG激光圆形后囊膜切开和十字形后囊膜切开共计432眼。Meta分析结果显示：圆形后囊膜切开组和十字形后囊膜切开组患者术后BCVA无差异(MD=-0.01,95%CI：-0.03～0.01,P=0.32); 术后眼压无差异(MD=-0.60,95%CI：-1.31～0.11,P=0.10); 使用激光能量无差异(MD=18.82,95%CI：-11.88～49.51,P=0.23); 晶状体受损率无差异(OR=0.97,95%CI：0.50～1.87,P=0.93); 眼前黑影飘动发生率无差异(OR=2.88,95%CI：0.28～29.26, P=0.37)。

结论：在白内障术后发生后囊膜混浊的患者行Nd：YAG激光后囊膜切开治疗中,圆形后囊膜切开与十字形后囊膜切开在治疗效果与安全性方面均无明显差异。     

【In Press】 Comparison of two Nd:YAG laser posterior capsulotomy: cruciate pattern vs circular pattern with vitreous strand cutting

AIM: To investigate the effects and safety of neodymium:yttrium-aluminium-garnet (Nd:YAG) laser posterior capsulotomy with vitreous strand cutting METHODS: A total of 40 eyes of 37 patients with symptomatic posterior capsular opacity (PCO) were included in this prospective randomized study and were randomly subjected to either cruciate pattern or round pattern Nd:YAG posterior capsulotomy with vitreous strand cutting (modified round pattern). The best corrected visual acuity (BCVA), intraocular pressure (IOP), refractive error, endothelial cell count (ECC), anterior segment parameters, including anterior chamber depth (ACD) and anterior chamber angle (ACA) were measured before and 1mo after the laser posterior capsulotomy. RESULTS: In both groups, the BCVA improved significantly (P<0.001 for the modified round pattern group, P=0.001 for the cruciate pattern group); the IOP and ECC did not significantly change. The ACD significantly decreased (P<0.001 for both) and the ACA significantly increased (P=0.001 for the modified round pattern group and P=0.034 for the cruciate group). The extent of changes in these parameters was not significantly different between the groups. CONCLUSION: Modified round pattern Nd:YAG laser posterior capsulotomy is an effective and safe method for the treatment of PCO. This method significantly changes the ACD and ACA, but the change in refraction is not significant. Modified round pattern Nd:YAG laser posterior capsulotomy can be considered a good alternative procedure in patients with symptomatic PCO.     

Comparison of two Nd:YAG laser posterior capsulotomy: cruciate pattern vs circular pattern with vitreous strand cutting

AIM: To investigate the effects and safety of neodymium: yttrium-aluminium-garnet (Nd:YAG) laser posterior capsulotomy with vitreous strand cutting METHODS: A total of 40 eyes of 37 patients with symptomatic posterior capsular opacity (PCO) were included in this prospective randomized study and were randomly subjected to either cruciate pattern or round pattern Nd:YAG posterior capsulotomy with vitreous strand cutting (modified round pattern). The best corrected visual acuity (BCVA), intraocular pressure (IOP), refractive error, endothelial cell count (ECC), anterior segment parameters, including anterior chamber depth (ACD) and anterior chamber angle (ACA) were measured before and 1mo after the laser posterior capsulotomy. RESULTS: In both groups, the BCVA improved significantly (P<0.001 for the modified round pattern group, P=0.001 for the cruciate pattern group); the IOP and ECC did not significantly change. The ACD significantly decreased (P<0.001 for both) and the ACA significantly increased (P=0.001 for the modified round pattern group and P=0.034 for the cruciate group). The extent of changes in these parameters was not significantly different between the groups. CONCLUSION: Modified round pattern Nd:YAG laser posterior capsulotomy is an effective and safe method for the treatment of PCO. This method significantly changes the ACD and ACA, but the change in refraction is not significant. Modified round pattern Nd:YAG laser posterior capsulotomy can be considered a good alternative procedure in patients with symptomatic PCO.     

Posterior vitreous detachment after neodymium:YAG laser posterior capsulotomy

PURPOSE: To determine whether retinal detachment (RD) after neodymium:YAG (Nd:YAG) laser posterior capsulotomy is due to a greater incidence of posterior vitreous detachment (PVD) than in controls and whether vitreous status at the time of capsulotomy is useful in predicting the risk for RD. SETTING: Teaching hospital ophthalmology service. METHODS: Patients having Nd:YAG laser posterior capsulotomy after uneventful cataract surgery (treatment group) were prospectively studied. Fellow eyes that had extracapsular cataract extraction (ECCE) with intraocular lens (IOL) implantation but no Nd:YAG capsulotomy (no-laser group) formed 1 control group, and eyes that had no cataract surgery (phakic group) formed a second control group. The treatment group comprised 322 eyes; the no-laser group, 97; and the phakic group, 142. Dilated fundus and vitreous examinations were performed at baseline (before Nd:YAG capsulotomy) and 12 months postoperatively. RESULTS: At baseline, the prevalence of PVD was similar in the treatment and no-laser groups (61.8% and 63.9%, respectively; P=.2014) but was significantly lower in the phakic group (50.7%; P=.0151). There was no significant difference among the groups in the development of PVD in eyes with attached vitreous at baseline (17.9%, treatment group; 11.4%, no-laser group; 17.1%, phakic group) (P=.6588). CONCLUSIONS: The prevalence of PVD was significantly higher in eyes after ECCE and IOL implantation than in phakic eyes independent of Nd:YAG laser posterior capsulotomy. Capsulotomy was not associated with a significantly higher incidence of new PVD; therefore, the presence or absence of PVD at the time of capsulotomy is not helpful in assessing the risk for RD in the first year after laser treatment.     

后发性白内障Nd:YAG激光后囊切开尺寸对眼部生物学参数及屈光状态的影响

目的：评估不同切口尺寸的Nd：YAG激光后囊切开术对后发性白内障(posterior capsule opacification,PCO)患者最佳矫正视力(BCVA)、眼压(IOP)等眼部生物学参数及屈光状态的影响。

方法：选取2017-06/2017-12于上海市东方医院眼科行Nd：YAG激光后囊切开术治疗的PCO患者41例41眼的临床资料进行回顾性分析,根据后囊切开尺寸将患者分成2组,囊膜切口≤3.5mm为组1(20例20眼),囊膜切口>3.5mm为组2(21例21眼)。分别于术前,术后1wk,1、3mo行BCVA、屈光度、IOP、ACD、黄斑厚度(MT)等检查。

结果：术后1wk,1、3mo,两组患者BCVA均较术前显著改善,差异均有统计学意义(P<0.001),但两组之间差异均无统计学意义(P>0.05)。手术前后,两组患者屈光度(SE)比较,差异无统计学意义(P>0.05)。术后1wk,组2患者IOP高于组1,差异有统计学意义(t=-2.609,P=0.013)。术后1wk,两组患者ACD均较术前明显变浅,差异均有统计学意义(P<0.01),但术后1、3mo两组患者ACD差异均无统计学意义(P>0.05)。术后1wk,两组患者MT均较术前轻度增加,但差异无统计学意义(P>0.05),且术后1wk,1、3mo两组患者MT差异均无统计学意义(P>0.05)。

结论：后囊切开尺寸对Nd：YAG激光后囊切开术后IOP影响显著,对BCVA、ACD、SE、MT无明显影响。     

早期Nd:YAG激光后囊切开预防青壮年白内障术后后囊混浊

目的：寻找预防青壮年白内障术后后囊混浊的简单方法。

方法：在行白内障超声乳化吸出联合人工晶状体植入后1mo行Nd：YAG激光后囊切开。

结果：观察组21眼经3a随访,3眼出现后囊混浊。对照组20眼,3a时12眼发生后囊混浊,与观察组比较,Z=-3.04,P=0.002,两组差异有统计学意义。

结论：Nd：YAG激光预防性后囊切开,可有效地防止青壮年白内障术后后囊混浊的发生。     

Refraction,intraocular pressure and anterior chamber depth changes after Nd:YAG laser treatment for posterior capsular opacification in pseudophakic eyes

Purpose: The aim was to investigate the effect of Nd:YAG capsulotomy on refraction, intraocular pressure and anterior chamber depth changes and complications of Nd:YAG laser treatment for posterior capsular opacification in pseudophakic eyes. Methods: Our study includes 26 eyes (23 patients) with posterior capsular opacification after uncomplicated phacoemulsification surgery and intraocular lens implantation. Complete ocular examinations were performed for all patients. The visual acuity, intraocular pressure and anterior chamber depth measurements were obtained in all examinations. Nd:YAG capsulotomy was measured in all patients. Eyes received one drop of aproclonidine 0.5 % before and immediately after YAG laser capsulotomy. Data were analysed statistically. Results: Mean patient age was 53.73 ± 13.53 years. Before Nd:YAG capsulotomy mean anterior chamber depth was 4.03 ± 0.58 mm and in the first day after capsulotomy the mean value was 4.02 ± 0.46 mm. Mean spherical equivalent refraction before laser treatment was ‐0.52 D and on the first day after laser treatment was ‐0.49 D. An improvement in visual acuity was achieved in all cases. Before Nd:YAG capsulotomy mean visual acuity was 0.38 ± 0.13 and on the first day after capsulotomy, the mean value was 0.93 ± 0.11, the difference of which was statistically significant. There were no statistically significant differences between the anterior chamber depth and intraocular pressure measurements before laser capsulotomy and on the first day, first month and third month after laser. Conclusion: Nd:YAG laser capsulotomy is an effective and safe method of treatment of posterior capsular opacification.     

Posterior capsule opacificationin eyes with a silicone or poly(methyl methacrylate) intraocular lens

Purpose:To evaluate the effect of poly(methyl methacrylate) (PMMA) and silicone intraocular lenses (IOLs) on posterior capsule opacification (PCO) after cataract surgery.Setting:Kangnam St. Mary's Hospital, Seoul, Korea.Methods:This retrospective study comprised 48 patients (54 eyes) who hadneodymium:YAG (Nd:YAG) laser posterior capsulotomy from March 1995 to December 1997. All operations were performed by 1 surgeon using the same technique except for incision method.Results:Mean interval from cataract surgery to Nd:YAG capsulotomy was 31 months in the PMMA group and 15 months in the silicone group. The difference between groups was statistically significant (P = .0002). The ratio of Elschnig pearl to fibrosis type PCO was 16:6 in the PMMA group and 14:18 in the silicone group Mean total Nd:YAG laser energy used was 256 mJ in the PMMA group and 309 mJ in silicone group. However, the damage caused by the laser was more severe and more common in the silicone group.Conclusion:Silicone IOLs induced PCO faster than PMMA IOLs, with fibrosis the most common type in the silicone group. Precautions should betaken to prevent damage during Nd:YAG laser capsulotomy in eyes with a silicone IOL.     

后囊浑浊激光治疗术后角膜内皮细胞的观察

目的 观察Ｎｄ：ＹＡＧ激光后囊切开术对角膜内皮细胞的影响。方法 对５２眼后囊浑浊行Ｎｄ：ＹＡＧ激光后囊切开术。术前、术后１周,１月及３月检查角膜内皮细胞密度。结果 术后１周、１月、３月角膜内皮细胞密度均较术前下降,内皮细胞丢失率依次为２．６８％、５．６５％和６．２８％。有统计学差异（ｔ值分别为２．２４７,３．５４１和２．４４９,Ｐ〈０．０５）。内皮细胞丢失与每次能量有显著相关性（ｒ＝０．４１９,Ｐ