高度近视白内障植入非球面与球面IOL视觉质量观察

目的：观察高度近视合并白内障植入非球面与球面人工晶状体术后视觉质量。

方法：回顾性分析高度近视合并白内障患者42眼,其中植入非球面IOL(Alcon SN60WF)22眼,植入球面IOL(Alcon SN60AT)20眼,所有病例术后裸眼视力均>0.2,术后6mo对视力、表观调节力、对比敏感度等视功能检查。

结果：术后6mo非球面IOL和球面IOL两组的矫正远视力、矫正远视力后的近视力、表观调节力比较差异均无统计学意义(P>0.05),在暗视及暗视眩光状态下,低、中空间频率非球面IOL组CS和GCS优于球面IOL组,差异有统计学意义(P<0.05),在高频区、明视及明视眩光状态下两组间CS和GCS差异无统计学意义(P>0.05)。

结论：高度近视合并白内障患者非球面IOL植入术后CS和GCS优于球面IOL植入术后,可以改善视觉质量。     

非球面人工晶状体植入术后对比敏感度观察

目的:评价白内障超声乳化吸除联合非球面人工晶状体(intraocularlens,IOL)植入术后对比敏感度(contrast sensitivity,CS)的变化。方法:对45例(48眼)老年性白内障患者实施超声乳化吸除联合IOL植入术,24例(25眼)植入Z9001非球面IOL(AIOL);21例(23眼)植入AR40e单焦球面IOL(SI-OL)。术后3mo应用美国Stereo Optical公司产的OPTEC 6500P视功能测试系统的对比敏感度测试包分别在空间频率为1.5,3,6,12,18cpd的昼及夜照明条件下对手术眼进行有眩光和无眩光的对比敏感度检查。所得数据进行t检验。结果:术后3mo,AIOL组在大部分空间频率下CS普遍优于SIOL组,差异有统计学意义(P<0.05),在1.5cpd有眩光昼及夜照明条件,AIOL组的CS与SIOL组无统计学差异。结论:植入Z9001非球面IOL后,提高了患者的对比敏感度,明显改善患者的视觉质量.     

改良ABC设计的非球面IOL植入对白内障患者术后视觉质量的影响

目的:评估改良非球面平衡曲线(ABC)设计的非球面人工晶状体(IOL)植入术后的视觉质量,同时进行临床IOL选择的影响因素分析,指导患者的IOL选择方案。方法:前瞻性病例对照研究。选取拟行白内障超声乳化联合折叠式IOL植入术的单纯性白内障患者67例74眼,其中观察组植入改良设计IOL 23眼(HOYA Vivinex XY1组),对照组植入传统设计IOL 51眼(Tecnis ZCB00组27眼,IQ SN60WF组24眼),术后1wk, 1mo测量裸眼视力及最佳矫正视力、不同瞳孔直径下(3、4、5、6mm)全眼球差及彗差、不同瞳孔直径(3、4、5mm)下的调制传递函数(MTF)曲线、客观散射指数(OSI)、眼内散射光值Log(s)及对比敏感度。对所得的数据进行统计学分析。结果:三组术后1wk, 1mo裸眼视力及最佳矫正视力均较术前显著提高,组间均无差异(P>0.05)。术后全眼球差值比较,术后1wk, 5、6mm瞳孔直径下三组存在差异(P=0.045、0.037),术后1mo 6mm瞳孔直径下三组存在差异(P=0.042)。全眼彗差值比较,术后1wk, 1mo 5、6mm瞳孔直...     

非球面人工晶状体植入术后视功能的临床研究

目的:评价Canon Staar KS—3Ai非球面人工晶状体(IOL)对提高年龄相关性白内障患者术后视功能的作用。方法:年龄相关性白内障患者98例(126眼)随机分成两组。在白内障超声乳化吸除术后,观察组52例(65眼)植入非球面IOL(Canon Staar KS—3Ai),对照组46例(61眼)植入球面IOL(Allergan Sensor AR40e)。观察患者术后的裸眼视力(uncorrected visual activity,UCVA)、最佳矫正视力(best corrected visual activity,BCVA)、屈光状态、对比敏感度(contrast sensitivity,CS)、波前像差的均方根(root mean square,RMS)值。随访时间为术后6mo。结果:术后6mo两组UCVA、BCVA、屈光状态差异无统计学意义。无眩光环境下12,18c/d空间频率和眩光环境下6,12,18c/d空间频率上观察组CS明显优于对照组。在瞳孔直径6mm时,观察组4阶像差、4阶球差、总高阶像差RMS值低于对照组。在瞳孔直径6mm时3阶像差、5阶像差RMS值及瞳孔直径3mm时两组高阶像差RMS值差异无统计学意义。结论:非球面IOL眼视觉质量明显优于球面IOL眼。     

A1-UV型非球面人工晶状体植入眼的主客观视觉质量评价

目的 从主观和客观上评价国产A1-UV型非球面IOL植入眼的视觉质量。方法 收集行超声乳化白内障吸除联合IOL植入术的年龄相关性白内障患者共73例(124只眼)分三组,A组23例(41只眼)植入A1-UV型非球面IOL;B组30例(50只眼)植入Tecnis ZCB00型非球面IOL;C组20例(33只眼)植入Sensar AR40e型球面IOL。术后3个月进行最佳矫正视力、对比敏感度和视觉质量检查。结果 术后3个月,三组最佳矫正视力分别为0.066±0.048、0.058±0.050、0.070±0.047,三组间比较差异无统计学意义(P>0.05)。三组患者在明视状态1.5c/d、3c/d、6c/d、12c/d空间频率下的对比敏感度差异无统计学意义(P>0.05),但在明视状态18c/d空间频率下和暗视状态各空间频率下的对比敏感度比较:A组和B组差异无统计学意义(P>0.05);A组和B组均显著高于C组,差异均有统计学意义(P<0.05)。三组的斯特列尔比和全眼球差分别为:0.211±0.069、0.229±0.065、0.156±0.053和0.062±0...     

光变色IOL、蓝光滤过IOL和普通IOL植入术后对比敏感度、眩光对比敏感度对比分析

目的观察光变色人工晶状体(intraocular lens,IOL)、蓝光滤过IOL和普通非蓝光滤过IOL植入术后的对比敏感度(contrast sensitivity,CS)和眩光CS的差异。方法 60例老年性白内障随机分为3组,均行白内障超声乳化吸出联合IOL植入术,分别植入光变色MATRIXTM400型IOL(A组)、Acrysof Nutural SN60AT蓝光滤过IOL(B组)、不具有光线滤过功能的LEN-STEC SofTec I普通折叠IOL(C组),术后3个月对3组患者进行最佳矫正视力、CS和眩光CS检查。结果术前A组最佳矫正视力为0.27±0.10,B组为0.27±0.09,C组为0.27±0.09,术后分别为0.75±0.08、0.70±0.09、0.70±0.09,术前、术后组间差异均无统计学意义(均为P>0.05),组内术前、术后差异均有统计学意义(均为P<0.05)。在3c.d-1、6c.d-1、12c.d-1空间频率上A组CS均高于B组和C组,差异均有统计学意义(均为P<0.05);在18c.d-1空间频率上A组与B组、C组的差异无统计学意义(均为P>0.05)。A组的眩光CS较CS有所提高,在各空间频率上差异均有统计学意义(均为P<0.05);B组和C组的眩光CS和CS比较,在各空间频率上差异均无统计学意义(均为P>0.05)。A组的CS函数曲线在正常人群范围之内,B组和C组的CS函数曲线低于正常人群。结论光变色MATRIXTM400型IOL比蓝光滤过Acrysof SN60AT IOL和不具有光线滤过功能的LENSTECS of TecI普通IOL有更好的CS和眩光CS,可以显著改善视觉质量。     

非球面与球面人工晶状体植入术后对比敏感度的比较

目的观察非球面人工晶状体（IOL）和球面IOL植入术后在视力相同的情况下其对比敏感度的差异。方法收集行超声乳化联合IOL植入术的年龄相关性白内障患者49例（60眼）,其中植入非球面IOL Tecnis ZA9003者24例30眼,植入球面IOL Sensar AR40e者25例30眼,所有病例术后裸眼LogMAR视力均〉0．1。术后3个月时采用CSV-1000对比敏感度测试仪分别测量明视、暗视和眩光状态下的对比敏感度,用F．A．C．T对比敏感度表测量近距离对比敏感度。结果在明视和暗视状态下的对比敏感度,非球面IOL组均高于球面IOL组,两组在空间频率6、12、18周／度时的差异均有统计学意义（P〈0．05）;暗视眩光状态下的对比敏感度,非球面IOL组高于球面10L组,两组在各空间频率的差异均有统计学意义（P〈0．05）。F．A．C．T对比敏感度测试卡测得的对比敏感度,非球面IOL组高于球面IOL组,两组在各空间频率的差异均有统计学意义（P〈0．05）。结论在传统的视力表检查视力正常和相同的情况下,非球面IOL植入术后较球面IOL植入术后患眼具有较好的对比敏感度,提示非球面IOL可以提高功能视力。     

高度近视合并白内障超声乳化术植入三种不同人工晶状体的临床分析

目的:比较高度近视合并白内障超声乳化吸除分别植入3种不同人工晶状体(intraocular lens,IOL)的临床效果。方法:回顾性系列病例研究。回顾性分析高度近视合并白内障患者68眼行超声乳化白内障吸除联合IOL植入术后3mo的随访资料。患者分别植入一体三襻式亲水性丙烯酸酯IOL(Bigbag,Zeiss)、一体C形襻亲水性丙烯酸酯IOL(620H,Rayner)、一体C形襻亲水性丙烯酸酯IOL(HQ201-hep)。使用Pentacam三维眼前节测量系统采集各眼Scheimpflug图像,测量散瞳后前房深度,使用Image-pro plus6.0图像分析得出IOL的倾斜度和偏心值。检测术后IOL眼实际屈光度与靶屈光度差异。满足正态分布和方差齐性的行单因素方差分析,采用SNK-q检验进行组间两两比较。结果:三组间前房深度比较有统计学意义(F=50.74,P<0.05)。实际屈光度与靶屈光度的误差,3组比较无统计学意义(F=1.391,P>0.05)。IOL偏位值与倾斜度在水平和垂直方向上的数值差异均无统计学意义(P>0.05)。未见后囊膜混浊、黄斑水肿、视网膜脱离发生。结论:三种不同IOL均可用于高度近视合并白内障患者,但各有其优越性和局限性。     

两种非球面衍射多焦点人工晶状体植入术后视觉质量评价

目的:综合评价非球面AcrySof ReSTOR+4D和非球面AcrySof ReSTOR+3D两种多焦点IOL植入术后患者的视觉质量,并探讨其相关影响因素。方法:白内障患者40例80眼,随机分为两组。A组:非球面AcrySof ReSTOR+3D(SN6AD1)IOL植入组;B组:非球面AcrySof ReSTOR+4D(SN6AD3)IOL植入组,其中A组为实验组,B组为对照组。术后1d;1wk;1,3mo行常规检查,并检查术眼裸眼远(UCDVA)、中(UCIVA)、近视力(UCNVA)。术后3mo检查最佳矫正远(BCDVA)、近视力(BCNVA),以及最佳矫正远视力下的近(DCNVA)、中视力(DCIVA);检查对比敏感度及波前像差;绘制离焦曲线,并进行主观问卷调查评分。结果:术后1d;1wk;1,3mo,两组的UCDVA差异均无统计学意义(P>0.05),UCIVA的差异均有统计学意义(P<0.05)。UCNVA在术后第1d,两组间的差异有统计学意义(P<0.05),而在其余时间段,两组间差异无统计学意义(P>0.05)。术后3mo时,两组的BCDVA,BCNVA,DCNVA,DCIVA差异均无统计学意义(P>0.05);两组间总像差、高阶像差、球差间,差异无统计学意义(P>0.05);在各个视角水平有/无眩光下,对比敏感度差异无统计学意义(P>0.05)。离焦曲线显示:B组在+0.0D和-3.0D处形成两个焦点,而A组不仅在+0.0D和-2.5D处形成两个焦点,而且在-2.0～-2.5D之间可形成一个平台期。问卷调查显示:两组患者视远、视近的满意度较高;而视中距离时,A组患者满意度明显高于B组。两组患者术后视觉不良症状发生率,差异无统计学意义(t=-0.87,P>0.05)。结论:非球面AcrySof ReSTOR+3D IOL植入术后,为患者提供了良好的远、中、近全程视力,尤其是中距离视力较非球面AcrySof ReSTOR+4D IOL有了显著的改善,且没有明显的视觉干扰,提高了患者的视觉和生活质量。     

微切口超声乳化加非球面人工晶状体植入治疗白内障的临床评价

目的:探讨超声乳化联合非球面人工晶状体植入对白内障患者术后视觉质量的影响.方法:年龄相关性白内障患者(50例63眼)随机分为试验组25例33眼和对照组25例30眼,两组患者手术方法相同,试验组植入非球面人工晶状体,对照组植入球面人工晶状体;比较术后裸眼视力、最佳矫正视力,并检查两组患者对比敏感度和像差.结果:术后1wk;1,3mo两组患者裸眼视力相比差异无统计学意义(P＞0.05),术后3mo两组最佳矫正视力相比差异亦无统计学意义(P＞0.05).在非眩光和眩光条件下,两组患者在3.0,6.0,12.0,18.Ocd频段下对比敏感度比较差异无统计学意义(P＞0.05);在1.5cd频段下,试验组对比敏感度值显著高于对照组,组间比较差异具有统计学意义(P＜0.05);术后3 mo试验组球差、彗差均显著低于对照组,两组间比较差异具有统计学意义(P＜0.05).结论:非球面人工晶状体在低频段对比敏感度显著优于球面人工晶状体,并能够降低白内障患者术后的总像差,从而提高白内障患者术后的视觉功能.     

蓝光滤过型非球面人工晶状体植入术后视觉质量的临床研究

目的观察行超声乳化白内障吸除联合植入蓝光滤过型非球面人工晶状体（HOYA PY-60AD）眼的术后视觉质量。设计前瞻性临床研究。研究对象57例（57眼）年龄相关性白内障患者。方法接受超声乳化白内障吸除术的年龄相关性白内障患者57例（57眼）按就诊顺序登记及随机表法将患者分为2组,术中分别植入非球面人工晶状体HOYAPY-60AD（29眼）和球面人工晶状体HOYA AF-1（UY）（28眼）。术后随访3个月。随访时进行一般眼科检查,包括视力、眼压、眼前节及眼底,并记录术后3个月时的裸眼视力（UCVA）、最佳矫正视力（BCVA）、低对比度视力（ETDRS低对比度视力表）、对比敏感度（OPTEC6500,明视、明视眩光、间视和间视眩光）并填写调查问卷（Catquest-9SF）。主要指标UCVA,BCVA,低对比度视力,对比敏感度和调查问卷分值。结果术后3个月,非球面组患者明视（400Lux）条件下5％对比度视力（0．35±0．13）及间视（30Lux）条件下5％（0．49±0．13）和25％（0．25±0．12）对比度视力均好于球面组,分别为（0．43±0．15）、（0．61±0．12）、（0．32±0．14）,差异有统计学意义（P均≤0．05）,间视及间视＋眩光条件下低中频（1．5c／d、3c/d、6c／d、12c/d）的对比敏感度非球面组均好于球面组,差异有统计学意义（P均40．05）。两组患者UCVA、BCVA及调查问卷分值均无统计学差异（P均≥0．05）。结论非球面人工晶状体能够提供较好的低对比度视力和暗环境下的对比敏感度,提示非球面人工晶状体能够提供较好的视觉质量。（眼科,2010,19：89-92）     

Contrast sensitivity and color perception with orange and yellow intraocular lenses

Purpose. To evaluate contrast sensitivity function (CSF) and color vision after implantation of either orange or yellow-tinted intraocular lenses (IOLs). Methods. Fifty-six eyes of 28 cataract patients who had bilateral implantation of orange-tinted (PC440Y Orange, Ophtec), yellow-tinted (AcrySof Natural SN60AT, Alcon), or clear (AcrySof SA60AT, Alcon) IOLs were examined. Six months postoperatively, monocular CSF under photopic and mesopic (with and without glare) conditions were measured using the Functional Visual Analyzer. Color discrimination was determined with the Farnsworth-Munsell 100-Hue test. Results. Patients implanted with orange-tinted, yellow-tinted, or clear IOLs displayed similar CSF values, with no statistically significant differences at any spatial frequency (p>0.05). There were no statistically significant differences in chromatic discrimination among the 3 groups of patients (p>0.05). Conclusions. Orange or yellow blue-filtering IOL implantation is comparable to a clear IOL in terms of photopic and mesopic contrast sensitivity or color discrimination.     

Effect of blue staining of expandable hydrophilic intraocular lenses on contrast sensitivity and glare vision

PURPOSE: To evaluate the effect of trypan blue staining of expandable hydrophilic acrylic intraocular lenses (IOLs) on contrast sensitivity and glare. SETTING: Department of Ophthalmology, Federal University, and Oculistas Associados, Rio de Janeiro, Brazil. METHODS: Phacoemulsification with expandable hydrophilic IOL implantation was performed in 19 eyes. Group 1 (stained group) consisted of 12 eyes with the IOL unintentionally stained by trypan blue 0.1% solution during surgery; Group 2 (unstained group) consisted of 7 eyes with IOLs that were not stained because trypan blue was not used during surgery. The eyes were examined postoperatively for Snellen best corrected visual acuity (BCVA), contrast sensitivity BCVA, and glare vision. The examiners were masked to whether the IOL was stained by trypan blue. Inclusion criteria included a BCVA of 20/30 or better 1 month postoperatively. Patients who had other ocular pathology or previous ocular surgery were excluded from the study. RESULTS: The mean postoperative BCVA was 20/24 in the stained group and 20/23 in the unstained group (P =.73). The mean contrast sensitivity visual acuity was 20/31 in the stained group and 20/26 in unstained group (P =.10). The mean glare visual acuity was 20/75 and 20/33, respectively (P =.03). CONCLUSIONS: Patients with expandable hydrophilic acrylic IOLs stained with trypan blue performed significantly worse on a glare vision test than patients whose IOLs were not stained. Cataract surgeons should avoid using trypan blue with this IOL type.     

Tecnis Z9000人工晶状体植入术后的视功能改变

目的:评价非球面人工晶状体(intraocular lens,IOL)TecnisZ9000对提高年龄相关性白内障患者术后视功能的作用。方法:选取年龄相关性白内障患者34例36眼,其中18眼为Tecnis Z9000组,18眼为传统球面人工晶状体组。检查术后3mo最佳矫正远视力,不同亮度环境及有、无散瞳条件下的对比敏感度(contrast sensitivity,CS)。结果:手术后3mo最佳矫正远视力Tecnis Z9000组为0.89±0.17,球面人工晶状体组为0.76±0.16,两组差异有显著性(P<0.05)。正常瞳孔下,两组晶状体在不同空间频率(1.5,3,6,12,18c/d)、不同照明条件下CS无显著差别。散瞳后Tecnis组亮环境(亮度为85cd/m2)下的12,18c/dCS及暗环境(亮度为3cd/m2)下1.5,3c/dCS均分别与同条件下的球面人工晶状体组比较差异有显著性。结论:白内障术后早期,Tecnis Z9000可提高最佳矫正远视力和对比敏感度,改善术眼视功能。     

非球面人工晶状体植入术后视觉质量对比分析

目的:评价3种非球面人工晶状体(AcrySof SN60WF、TecnisZ9001和KS-3Ai)植入术后的视觉质量。方法:采用前瞻性随机对照研究方法,收集我院老年性白内障手术患者88例126眼,平均年龄67.3±8.7岁,将入选患者按植入不同的人工晶状体(Intraocular lens,IOL)随机分为4组:AcrySofSN60WF(IQ)组(23例33眼)、TecnisZ9001组(23例33眼)、KS-3Ai组(20例29眼),SN60AT球面人工晶状体组为对照组(22例31眼)。术后随访3mo,观察指标:裸眼视力(uncorrected visual acuity,UCVA)及最佳矫正视力(best corrected visual acuity,BCVA),眼压,等效球镜度数,角膜Q值,瞳孔直径,6mm全眼球总高阶像差及四阶球差均方根值(root mean square,RMS),夜光、昼光及夜眩光3种视觉条件下的对比敏感度(contrast sensitivity,CS)。结果:术后各组的UCVA、BCVA、等效球镜度数和瞳孔直径均无统计学差异。总高阶像差和四阶球差RMS:非球面组低于球面组,差异具有统计学意义(P<0.05);非球面组间比较无统计学差异。术后角膜Q值与球差成正相关(r=0.183,P<0.05)。术后对比敏感度:与球面IOL相比,IQ,Tecnis可提高术后3种视觉条件下的CS,KS-3Ai可提高术后夜光、夜眩光两种视觉条件下的CS;非球面IOL组间比较,IQ组在昼光、夜眩光视觉条件下的CS好于Tecnis组和KS-3Ai组,TECNIS组和KS-3Ai组之间在3种视觉条件下均无统计学差异。结论:3种非球面IOL均可有效地减少术眼的总高阶像差和四阶球差。3种非球面IOL均可以提高术眼术后的CS,IQ组在昼光、夜眩光视觉条件下的CS与Tecnis组和KS-3Ai组相比较差异具有统计学意义,Tecnis组和KS-3Ai组之间在3种视觉条件下的CS均无统计学差异。     

Visual function in patients with yellow tinted intraocular lenses compared with vision in patients with non-tinted intraocular lenses

AIM: To compare the visual function in patients with short wavelength blue light blocking yellow tinted intraocular lenses (IOLs) with that in patients with non-tinted IOLs. METHODS: 74 patients scheduled for bilateral cataract surgery underwent implantation of either yellow IOLs (HOYA YA60BB) or non-tinted IOLs (VA60BB) in both eyes. Contrast visual acuity with and without a glare source was measured under photopic (100 cd/m2) and mesopic (slightly higher luminance than typically used-5 cd/m2) conditions at 2 weeks and 3 months after surgery using the contrast sensitivity accurate tester. Visual acuity and the incidence of patients who noted cyanopsia were also examined. RESULTS: No significant differences between the yellow tinted and non-tinted IOL groups were observed in mean visual acuity or in photopic or higher luminance mesopic contrast visual acuity with and without glare source at either 2 weeks or 3 months after surgery. Furthermore, there was no significant difference in contrast visual acuity loss as a result of glare. The incidence of patients who noticed cyanopsia was significantly less in the yellow tinted IOL group than in the non-tinted IOL group at 2 weeks after surgery (p = 0.0234), but no patients reported cyanopsia at 3 months. CONCLUSION: Visual function in patients with yellow tinted IOLs is virtually the same as that in patients with non-tinted IOLs.     

白内障手术植入球面和非球面人工晶状体后视觉质量的比较

目的 评估白内障手术植入负球差设计的非球面折叠式人工晶状体(Intraocularlen,IOL)后的视觉质量.方法 取112例(152只眼)白内障超声乳化手术患者按数字表法被分为三组,第一组植入TecnisZ9003IOL(美国 AMO 公司),第二组植入AcrysofIQIOL(美国Alcon公司),第三组植入HQIOL(法国Hexavision公司).于术后一周、一月、三月分别检测裸眼视力、最佳矫正视力,无眩光及有眩光环境下的白天夜晚对比敏感度,同时检测全眼的球差、第三、第四、第五阶像差均方根(root mean square,RMS)、总高阶像差(higher-order aberration,HOA)RMS以及总像差(total ocular aberration,TOA)RMS.结果 术后三次随访三组患者的裸眼视力和最佳矫正视力差异均没有统计学意义.术后一周、一月时三组白天对比敏感度未见显著差异,术后一月、三月时TecnisZ9003组和AcrysofIQ组的夜间对比敏感度在中、低空间频率上明显好于HQ组,同时术后三月时该两组的白天对比敏感度亦好于HQ组,差异均具有统计学意义(P＜0.05).另外,术后三次随访TecnisZ9003组和AcrysofIQ组全眼的球差、RMS4均低于HQ组,在术后一月、三月时HOA较HQ组低,同时术后三次随访在瞳孔直径6mm大小时TOA亦较低,差异均有统计学意义(P＜0.05).结论 植入负球差设计的非球面人工晶状体可提高白内障患者术后对比敏感度,降低球差和高阶像差,获得更好的视觉质量.     

白内障手术植入球面和非球面人工晶状体后视觉质量的比较

目的 评估白内障手术植入负球差设计的非球面折叠式人工晶状体(Intraocularlen,IOL)后的视觉质量.方法 取112例(152只眼)白内障超声乳化手术患者按数字表法被分为三组,第一组植入TecnisZ9003IOL(美国 AMO 公司),第二组植入AcrysofIQIOL(美国Alcon公司),第三组植入HQIOL(法国Hexavision公司).于术后一周、一月、三月分别检测裸眼视力、最佳矫正视力,无眩光及有眩光环境下的白天夜晚对比敏感度,同时检测全眼的球差、第三、第四、第五阶像差均方根(root mean square,RMS)、总高阶像差(higher-order aberration,HOA)RMS以及总像差(total ocular aberration,TOA)RMS.结果 术后三次随访三组患者的裸眼视力和最佳矫正视力差异均没有统计学意义.术后一周、一月时三组白天对比敏感度未见显著差异,术后一月、三月时TecnisZ9003组和AcrysofIQ组的夜间对比敏感度在中、低空间频率上明显好于HQ组,同时术后三月时该两组的白天对比敏感度亦好于HQ组,差异均具有统计学意义(P＜0.05).另外,术后三次随访TecnisZ9003组和AcrysofIQ组全眼的球差、RMS4均低于HQ组,在术后一月、三月时HOA较HQ组低,同时术后三次随访在瞳孔直径6mm大小时TOA亦较低,差异均有统计学意义(P＜0.05).结论 植入负球差设计的非球面人工晶状体可提高白内障患者术后对比敏感度,降低球差和高阶像差,获得更好的视觉质量.     

Retinal image contrast and functional visual performance with aspheric, silicone, and acrylic intraocular lenses. Prospective evaluation

PURPOSE: To compare the effects of an aspheric intraocular lens (IOL) (Tecnis Z-9000, Pharmacia Corp.) with those of conventional silicone (AA4207VF, Staar Surgical) and acrylic (AcrySof SA60AT, Alcon Surgical) lenses on retinal imaging and functional visual performance. SETTING: Eye Laser Center, Tucson, Arizona, USA. METHODS: In this prospective study, 221 eyes of 156 patients were randomly assigned to receive 1 of 3 IOLs. Visual acuity was measured preoperatively and 1 day, 1 and 3 weeks, and 1, 3, and 6 months postoperatively. Fundus photography and photopic and mesopic functional acuity contrast testing were performed preoperatively and 3 months postoperatively. RESULTS: The differences in the preoperative and postoperative spherical and astigmatic refractive errors and best corrected visual acuity among groups were not statistically significant. The postoperative uncorrected visual acuity was best in the aspheric group in the first month. Functional acuity contrast testing showed the aspheric IOL group had a 38% to 47% increase in photopic vision, 38% in photopic with glare, 43% to 100% in mesopic, and 9% to 100% in mesopic with glare. There was no increase in photopic vision in the acrylic group but increases of 38% in photopic with glare, 25% to 50% in mesopic, and 36% to 50% in mesopic with glare. The spherical silicone IOL group had no increase in contrast testing from preoperatively. Digital analysis of retinal imaging showed increased threshold luminance levels in the aspheric group (range 116 to 208 cd/m2) and a 4-fold increase in image contrast. CONCLUSIONS: All 3 IOLs led to improved visual acuity after cataract surgery. The aspheric IOL provided a significant improvement in retinal image contrast and visual performance measured by visual acuity and functional acuity contrast testing. This improvement was greatest in night vision and night vision with glare compared to the performance of conventional spherical silicone and acrylic IOLs.