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1.
目的比较光学低相干反射仪LENSTAR和光学相干生物测量仪IOLMaster测算人工晶状体(IOL)度数的差异,分析两者的精确性和一致性。方法 72例(122眼)白内障患者术前分别用LENSTAR和IOLMaster两种光学生物测量仪测量眼轴长度(AL)、角膜屈光度(K1和K2)和前房深度(ACD),并分别应用SRKⅡ、SRK/T、HofferQ、Holladay和Haigis公式计算拟植入AcrySofSA60ATIOL的度数,术后目标屈光度为正视。结果两种测量仪所得参数:AL差异为(0.02±0.10)mm,ACD差异为(-0.02±0.17)mm,差异均无统计学意义(P>0.05);K1、K2和(K1+K2)/2差异分别为(-0.05±0.21)D、(-0.12±0.20)D和(-0.08±0.14)D,差异有统计学意义(P<0.05)。两种测量仪测量的参数AL、K1、K2和ACD的Pearsonr值分别是0.999、0.991、0.992和0.927,具有良好的相关性。应用5种IOL度数计算公式得出的IOL度数在两种测量仪之间,差异无统计学意义,有良好的一致性。结论 LENSTAR和IOLMaster测量仪在测量结果和计算IOL度数方面有良好的相关性和一致性,均可用于白内障手术前精确的IOL度数测算。  相似文献   

2.
目的 探讨一种最新的光学低相干反射测量仪LenstarLS900对于眼球生物测量的准确性,将其测量值与光学相干生物测量仪IOLMaster的测量结果进行比较。方法 对照观察分别由LenstarLS900和IOLMaster测量的正常人群眼球的眼轴长度(axiallength,AL)、前房深度(anteriorchamberdepth,ACD)、角膜子午线上下的曲率半径(CR1、CR2)和白对白角膜直径(whitetowhitedistance,WTW)等眼球生物学参数。结果 本研究纳入了206个健康的成年个体(206眼),年龄(26.9±15.6)岁。两种测量仪对于AL、ACD、CR1、CR2和WTW等测量值的相关程度很高。LenstarLS900与IOLMaster的测量结果比较,AL差值(0.014±0.090)mm(P=0.025),CR1差值(0.006±0.030)mm(P=0.005),CR2差值(0.020±0.040)mm(P<0.001),均略长;WTW较短差值(-0.110±0.400)mm(P<0.001),ACD的差异无统计学意义(P=0.554)。除WTW一致性界限为-0.89~0.67mm外,两种测量仪的测量数据具有良好的一致性。结论 与IOLMaster相比较,LenstarLS900可提供同样准确、可靠的眼球生物测量数据(除WTW外),并且可提供中央角膜厚度和晶状体厚度数据,因此LenstarLS900在屈光手术和白内障手术领域有很好的应用前景,能满足未来高质量白内障手术的要求。  相似文献   

3.
目的:通过比较新型扫频测量仪(OA-2000)与光学相干生物测量仪(IOLMaster 500)在白内障患者眼轴测量的检出率和一致性,评价新型扫频测量仪在白内障的临床应用价值。方法:选取2018年3至8月广州爱尔眼科医院确诊为白内障的患者共561例(944眼),术前分别用OA-2000及IOLMaster500两部生物测量仪进行眼轴测量。检出率用卡方检验,相关性采用Pearson相关分析,一致性采用组内相关系数(interclass correlation coefficient,ICC)分析以及Bland-Altman分析。结果:OA-2000检出率为95.4%,IOLMaster 500检出率为64.7%,两组检出率差异有统计学意义(P<0.05)。Pearson相关分析结果示:OA-2000和IOLMaster 500眼轴测量值的散点图呈一条直线,存在线性关系,有极高的相关性(r=1,P<0.05);Bland-Altman分析结果显示:两设备测量的眼轴数据一致性良好。结论:OA-2000与IOLMaster 500在眼轴测量的一致性和相关性高。在白内障患者的眼轴测量,OA-2000比IOLMaster 500检出率更高,有更好的临床应用价值。  相似文献   

4.
光学相干生物测量仪测量人工晶状体度数精确性的评价   总被引:3,自引:0,他引:3  
目的 :通过对光学相干生物测量仪 (IOL Master)测量眼轴长度与传统接触式A超测量眼轴长度的比较 ,评价两种方法测量人工晶状体度数 (IOL)的精确性及特点。方法 :分析 2 0 0 3年 1月至 2 0 0 4年 4月间在我院行白内障超声乳化摘除及人工晶状体植入术的 1 51人 ( 2 55眼 ) ,其中IOL Master测量眼轴长度 1 31眼 ,接触式A超测量眼轴 1 2 4眼 ,使用IOL Master内SRK/T公式计算IOL度数 ,术后 1个月检查患者屈光状态。结果 :IOL Master组和A超组术后 1个月平均绝对屈光误差≤± 0 .50D者分别为 4 1 .98%和 2 8.2 3% ,χ2检验差异有显著性 ( χ2 =5.2 80 5,P <0 .0 5) ,≤± 1 .0 0D者分别为 70 .2 3%和 58.87% ,χ2 检验差异无显著性 ( χ2 =3.5984 ,P >0 .0 5) ;高度近视患者平均绝对屈光误差≤± 0 .50D者分别为 4 0 .74 %和 2 3.6 8% ,χ2 检验差异无显著性 ( χ2 =2 .90 4 4,P >0 .0 5) ,≤± 1 .0 0D者分别为 6 2 .96 %和 4 2 .1 1 % ,χ2检验差异有显著性 ( χ =3.91 0 9,P <0 .0 5) ;非高度近视患者平均绝对屈光误差≤± 0 .50D者分别为 4 2 .86 %和 30 .2 3% ,χ2 检验差异无显著性 ( χ2 =2 .80 37,P >0 .0 5) ,≤± 1 .0 0D者分别为 75.32 %和 6 6 .2 8% ,χ2 检验差异无显著性 ( χ2 =1 .6 0 0 ,P >0  相似文献   

5.
目的对白内障合并浅前房者,采用光学相干生物测量仪(IOLmaster)联合晶状体浑浊测量仪(OLM)检查,观察其对手术适应症及时机的预测准确性。方法随机收集白内障合并浅前房106例(128眼)。根据前房深浅分为轻度浅前房和高危浅前房。依据晶状体浑浊程度分为轻、中、重度浑浊。部分患者接受了超声乳化人工晶状体植人手术,或激光周边虹膜成形术。随访2年观察眼部情况、视力、眼压等。结果未手术组:轻度浅前房和高危浅前房者随访2a内的前房深度进行性变浅,眼压进行性升高(P〈0.05);随访2年内,随着晶状体浑浊程度进行性加重,晶状体重度浑浊者的中央前房深度浅于晶状体轻、中度浑浊者(P〈0.05),同时,眼压高于晶状体轻、中度浑浊者(P〈0.05)。白内障手术组:随访2年高眼压发生率(4.88%)低于未接受手术治疗者(41.30%)(P〈0.05);术后的中央前房深度深于术前(P〈0.05),也深于未接受手术者(P〈0.05);术后的眼压低于术前(P〈0.05),也低于未接受手术者(P〈0.05);不同程度浅前房者的视力都明显高于术前(P〈0.05),但术后高危浅前房组的视力低于轻度浅前房组(P〈0.05)。激光治疗组:轻度浅前房者,1年的眼压与术前相比差异无统计学意义(P〉0.05);高危浅前房者,1年的眼压高于术前(P〈0.05)。结论IOLmaster联合OLM检查能够客观评估白内障合并浅前房者的病情变化,确定手术时机。及早进行白内障手术是治疗此类患眼的关键所在,激光治疗远期疗效不确切。  相似文献   

6.
目的比较白内障患者散瞳前后使用光学生物测量仪(IOL Master)测量眼轴长度(AL)、平均角膜曲率(Km)及前房深度(ACD)的差异,探讨散瞳对人工晶状体(IOL)屈光度计算结果的影响。方法随机选择门诊预行白内障手术患者44例(85只眼),用IOL Master测量患者散瞳前后AL、Km及ACD数值,并计算IOL屈光度,比较散瞳前后SRKⅡ、SRK/T、Hoffer Q、Holladay四种公式计算结果的变化。结果散瞳前后AL值分别为:(23.840±1.739)mm、(23.849±1.737)mm,有显著性差异(P=0.001);Km值分别为:(44.849±1.647)D、(44.842±1.671)D,无显著性差异(P=0.797);ACD值分别为:(3.128±0.366)mm、(3.224±0.369)mm,有显著性差异(P=0.000)。设定目标屈光度为0 D,散瞳前后SRKⅡ公式计算结果分别为:(18.061±4.286)D、(18.043±4.225)D,无显著性差异(P=0.406);SRK/T公式计算结果分别为:(17.895±4.941)D、(17.885±4.821)D,无显著性差异(P=0.735);Hoffer Q公式计算结果分别为:(17.607±5.164)D、(17.588±5.054)D,无显著性差异(P=0.575);Holladay公式计算结果分别为:(17.779±5.062)D、(17.761±4.954)D,无显著性差异(P=0.581)。四种公式计算结果散瞳前后均无显著性差异,但是16只眼(18.82%)存在IOL屈光度变化大于0.28 D的现象。结论散瞳前后四种公式计算IOL屈光度均无显著性差异,但是仍然推荐在正常瞳孔下进行IOL Master测量,有利于提高IOL屈光度计算的准确性。  相似文献   

7.
超声生物显微镜在晶体病和人工晶体植入术的应用   总被引:1,自引:0,他引:1  
超声生物显微镜是 1 990年由 Palvin等〔1、2〕首先研制成功并应用于临床的一种新的超声诊断技术 ,第一次成功的获得眼前段任何子午切面的高分辨率、高清晰度的图象。它以其独特的功能结合人工晶体材料的高放射性对晶体前半部分、前房型及后房型人工晶体光学面及其襻的位置进行成像和定位 ,并确定它和周围结构的关系 ,而不受角膜混浊、瞳孔大小的影响 ,为晶体病的诊断和人工晶体植入术后人工晶体及其襻的位置、某些并发症的原因及转归 (如前房出血等 )、眼前段改变等研究提供客观依据。一、超声生物显微镜 (UBM)的历史超声诊断是雷达技术…  相似文献   

8.
目的对比Sirius光线追踪法和IOLMaster法测量准分子激光原位角膜磨镶术(LASIK)后人工晶状体(IOL)度数的一致性。方法前瞻性临床研究。收集近视和近视散光患者89例(89眼),根据术前等效球镜度(SE)分为轻中度近视组(≤-6.0 D,59眼)和高度近视组(>-6.0 D,30眼),对LASIK术前和术后1个月患者分别行Sirius角膜地形图和IOLMaster检查。术前使用IOLMaster自带的Haigis公式,术后使用Haigis和Haigis-L公式计算IOL度数,分别与Sirius光线追踪法计算所得IOL度数进行比较(IOL型号分别为Alcon SN60WF和AMO Tecnis ZA9003)。采用Bland-Altman对测量结果进行一致性分析。结果Bland-Altman分析显示术前Sirius光线追踪法与Haigis公式测量IOL度数在轻中度近视组2种型号IOL 95%一致性界限(LoA)分别为(-0.78~+0.84)D、(-0.57~+1.21)D,均有3%的点在各自的95%LoA外,组内相关系数(ICC)分别为0.976、0.945;高度近视组95%LoA分别为(-0.83~+0.69)D、(-0.57~+0.93)D,均有3%的点在各自的95%LoA外,ICC分别为0.981、0.979。术后Sirius法与Haigis公式对比:轻中度近视组95%LoA分别为(-0.27~+2.59)D、(-0.50~+3.30)D,均有5%的点在各自的95%LoA外,ICC分别为0.641、0.584;高度近视组95%LoA分别为(-0.48~+2.78)D、(-0.17~+3.17)D,分别有10%、7%的点在各自的95%LoA外,ICC分别为0.622、0.651。术后Sirius光线追踪法与Haigis-L公式对比:轻中度近视组95%LoA分别为(-1.02~+0.58)D、(-1.10~+0.77)D,分别有0、2%的点在各自的95%LoA外,ICC分别为0.986、0.955;高度近视组95%LoA分别为(-2.36~+0.80)D、(-1.98~+1.22)D,分别有7%、10%的点在各自的95%LoA外,ICC分别为0.667、0.638。结论Sirius光线追踪法与Haigis公式计算未手术眼IOL度数有较好的一致性,与Haigis-L公式计算轻中度近视LASIK术后IOL度数有较好的一致性,与Haigis-L公式计算高度近视LASIK术后IOL度数的一致性较差。  相似文献   

9.
目的:比较超乳手术时应用新型光学生物测量仪和标准超声波测量仪计算人工晶状体的屈光度及屈光结果。
  方法:前瞻性研究。研究包含37例37眼白内障患者接受白内障超声乳化联合人工晶状体植入术。同一测量人员分别使用新型光学生物测量仪( Aladdin)与标准超声波测量仪( Sonoled AB 5500)对白内障患者进行检测。通过这两种设备记录生物测定参数,包括眼轴长度、角膜曲率、前房深度及人工晶状体屈光度数。分析术后实际屈光不正与两台设备根据SRK/T公式计算的误差,比较两台设备检查结果的平均估计误差( EE )、平均绝对估计误差( AEE)及生物测定参数。
  结果:Aladdin测量仪(23.45±0.73 ll )较超声波测量仪(23.2±0.75 ll)检测出的眼轴显著较长(P=0.01)。Aladdin测量仪的EE与AEE均明显小于超声波测量仪( P=0.0006与0.03)。应用Aladdin测量的大多数眼与目标屈光度相差在±0.5(67%)及±1.00(97%)以内。
  结论:Aladdin光学生物测量仪较超声波测量仪更精确,屈光结果更准确。  相似文献   

10.
人工晶体植入术的经验和手术并发症告诫我们,理想的人工晶体应具备以下条件:通过微小的切口即可完成操作;人工晶体可自动调节远近视力和散光;不接触和蘑擦损伤晶体周围的眼内组织,不引起眼内有病理意义的改变;类似人眼晶体的透明性、屈光力和调节力,注入式人工晶体的研究正是向这个目标而努力。注入式人工晶体是在晶体核和皮质去除干净后,将凝胶或液状硅胶注入囊袋内,然后按囊袋的形状固化成晶体的形状。晶体囊膜仍被睫状小带支持,当凝胶固化时,囊膜仍然具有能弯曲性,由睫状肌收缩引起的晶体囊膜形状的改变可影响凝胶的形态,进而起到调节作用,使患者恢复近距离视力而无需戴阅读  相似文献   

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Aims:

To compare the consistency and accuracy in ocular biometric measurements and intraocular lens (IOL) power calculations using the new optical low-coherence reflectometry and partial coherence interferometry.

Subjects and Methods:

The clinical data of 122 eyes of 72 cataract patients were analyzed retrospectively. All patients were measured with a new optical low-coherence reflectometry system, using the LENSTAR LS 900 (Haag Streit AG)/ALLEGRO BioGraph biometer (Wavelight., AG), and partial coherence interferometry (IOLMaster V.5.4 [Carl Zeiss., Meditec, AG]) before phacoemulsification and IOL implantation. Repeated measurements, as recommended by the manufacturers, were performed by the same examiner with both devices. Using the parameters of axial length (AL), corneal refractive power (K1 and K2), and anterior chamber depth (ACD), power calculations for AcrySof SA60AT IOL were compared between the two devices using five formulas. The target was emmetropia. Statistical analysis was performed using Statistical Package for the Social Sciences software (SPSS 13.0) with t-test as well as linear regression. A P value < 0.05 was considered to be statistically significant.

Results:

The mean age of 72 cataract patients was 64.6 years ± 13.4 [standard deviation]. Of the biometry parameters, K1, K2 and [K1 + K2]/2 values were significantly different between the two devices (mean difference, K1: −0.05 ± 0.21 D; K2: −0.12 ± 0.20 D; [K1 + K2]/2: −0.08 ± 0.14 D. P <0.05). There was no statistically significant difference in AL and ACD between the two devices. The correlations of AL, K1, K2, and ACD between the two devices were high. The mean differences in IOL power calculations using the five formulas were not statistically significant between the two devices.

Conclusions:

New optical low-coherence reflectometry provides measurements that correlate well to those of partial coherence interferometry, thus it is a precise device that can be used for the pre-operative examination of cataract patients.  相似文献   

14.
儿童白内障手术人工晶状体度数计算准确性分析   总被引:1,自引:0,他引:1  
目的 分析儿童眼人工晶状体度数计算的准确性.方法 回顾性研究37例(62只眼)行先天性白内障摘除加人工晶状体(IOL,intraocular lens)植入术患儿生物测量及屈光状态数据,应用SRKⅡ计算IOL度数.术后2个月行视网膜检影验光检测屈光状态.分析手术年龄,眼轴长度,IOL植入时机与IOL度数计算准确性关系.结果 全部平均绝对预测误差为(1.56±1.43)D.绝对预测误差低于1.0 D共32只眼,占总眼数52%.眼轴≤20 mm组绝对预测误差为(2.75±1.66)D,>20 mm组为(1.06±0.93)D,2组间差异具有统计学意义(P<0.01).年龄≤2岁组绝对预测误差为(2.38±1.65)D,>2岁为(1.04±0.99)D,2组间差别具有统计学意义(P<0.01).Ⅰ期IOL植入组绝对预测误差为(1.37±1.35)D,Ⅱ期IOL植入为(2.03±1.56)D,2组间差异无统计学意义(P=0.22).结论 全组植入的IOL度数安全有效.眼轴≤20 mm及年龄≤2岁患儿绝对预测误差明显增加.该研究证明,专门为儿童眼设计IOL计算公式是有必要的.
Abstract:
Objective To determine the accuracy of intraocular lens (IOL) power calculation in a group of pseudophakic children. Methods A relrospective analysis of biometric and refractive data was performed on 62 eyes of 37 infants and children, who successfully underwent cataract extraction and IOL implantation. SRKII were used to calculate the IOL power. The postoperative refractive outcome was taken as the spherical equivalent of the refraction at 2 months afier surgery by retinoscopy. The data were analyzed to assess the effects of age at the time of surgery, axial length, and primary or secondary intraocular lens implantation on the accuracy of calculation of IOL power. Results For the overall group the mean and median prediction errors were 1.56D (SD 1.43). There were 32 eyes'absolute predictions errors lower than 1D (52%). The mean absolute prediction errors in eyes with axial lengths≤20 mm were 2.75 D (SD 1.66), and in eyes >20 mm were 1.06 D (SD 0.93). The mean absolute prediction errors in eyes in children aged≤2 years were 2.38 D (SD 1.65), and in children aged >2 years were 1.04D (SD 0.99). The differences between the absolute prediction errors for both axial length and age were statistically significant (P <0.01). The mean-absolute prediction errors in eyes with primary IOL implantation were 1.37D (SD 1.35), and secondary intraocular lens implantation were 2.03D (SD 1.56). The differences between the absolute prediction errors primary or secondary intraocular lens implantation, were not statistically significant (P =.22). Conclusions For the overall group IOL power calculation is generally acceptable. In eyes with axial lengths less than 20 mm and in children younger than 2 years of age larger errors can arise, and the variations increase. This study demonstrates the need for an IOL formula specifically designed for pediatric use.  相似文献   

15.
目的 应用裂隙灯显微镜眼前节相干光断层扫描(OCT)观察超声乳化白内障吸除联合人工晶状体(IOL)植入术后眼前节组织的变化情况,探讨手术对眼前节结构的影响.方法 前瞻性系列病例研究.使用海德堡公司裂隙灯显微镜眼前节OCT观察40例(44只眼)行超声乳化白内障吸除联合IOL植入术患者术前和术后1 d、1周、2周及1个月的眼前节组织变化情况.对所测量的数据进行重复测量设计资料的方差分析,用LSD法进行两两比较.结果 中央及切口处角膜在术后第1天全部患者均明显增厚(与术前相比增厚分别为99.59μm,234.57μm;P=0.490),中央角膜厚度至术后1个月可恢复术前水平,而切口处角膜厚度还较术前厚约19.25μm(P=0.001);前房深度(ACD)和各项反映前房角宽度的指标(AOD500、AOD750、TISA500、TISA750)在术后各观察时间点,均较术前明显加深和加宽(均P<0.05);ACD虽在术后2周以内的变化不大(均P<0.05),但在术后1个月时还尚不能保持稳定;而前房角宽度的变化在术后早期就可基本保持稳定(均P>0.05).结论 裂隙灯显微镜眼前节OCT可客观、定量评价白内障手术对眼前节形态特征的影响.  相似文献   

16.
AIM: To compare the Barrett True-K Formula with other formulas integrated in Lenstar 900 to predict intraocular lens (IOL) power after small-incision lenticule extraction (SMILE). METHODS: A theoretical prospective study was performed to predict the ratio of equivalent IOL power before and after SMILE using the SRK/T (Sanders, Retzlaff, Kraff/theoretical), Holladay 1, Haigis, and Barrett True-K formulas and compare the stability of their predictions. The study included 54 eyes (54 cases) with a manifest refraction spherical equivalent (MRSE) of –4.99±1.45 D. They were divided into two groups: 27 eyes with axial length of 24-26 mm in group A, and 27 eyes with axial length >26 mm in group B. All subjects enrolled in this study were examined with the Lenstar 900 before and 6mo after SMILE including measurements of axial length, corneal curvature, and anterior chamber depth (ACD). RESULTS: The prediction of equivalent IOL power of the two groups was more stable for the Barrett True-K formula, especially in long axial-length eyes (group B). The respective percentages for the SRK/T, Holladay 1, Haigis, and Barrett True-K formulas were 7.4%, 7.4%, 85.19%, and 88.89% for a margin of error within 0.5D; 25.92%, 51.84%, 100%, and 100% for a margin of error within 1.0D in group A; 33.33%, 40.74%, 44.44%, and 81.48% for a margin of error within 0.5D; and 44.44%, 59.26%, 66.66%, and 92.59% for a margin of error within 1.0D in group B. The respective percentages for Barrett True-K formulas were 100% for a margin of error within 2.0D in group B. CONCLUSION: Theoretically, the Barrett True-K formula provides more stable predictions than other formulas for cataract eyes after SMILE.  相似文献   

17.
随着白内障手术技术的提高和人工晶状体的不断改进,白内障术前的生物测量仪器也在不断发展.光学相干生物测量仪作为一种新的人工晶状体度数测算工具,与传统的超声生物测量仪器相比具有非接触、分辨率高、操作简便、安全、易被患者接受的特点,在临床上应用日益广泛.本文就光学相干生物测量仪-IOL Master的原理、临床应用、优越性、局限性等方面作一综述.  相似文献   

18.
刘馨  罗怡 《国际眼科纵览》2012,36(4):271-275
近年来,婴儿先天性白内障摘除后一期植人人工晶状体受到越来越多眼科医生的认可,并在临床实践中逐步开展。25G玻璃体切除系统在婴儿白内障手术中的应用,大大降低了术后并发症的发生;新型屈光度计算公式和近视漂移预测公式的发展,提高了人工晶状体屈光度选择的准确性;更适合婴幼儿的人工晶状体和弱视训练方法的发展,提升了术后视功能重建的效果。  相似文献   

19.
Objective To investigate quantitative changes of the anterior segment configuration after clear corneal incision phacoemulsification and foldable intraocular lens (IOL) implantation with slit-lamp-adapted optical coherence tomography (SL-OCT). Methods In prospective consecutive case series, clear corneal incision phacoemulsification and foldable intraocular lens implantation were performed in 44 eyes of 40 patients. The changes of the anterior segment configuration were performed by SL-OCT before and 1 day, 1 week, 2 weeks and 1 month after surgery. SPSS 16.0 software was used to analyze statistical difference. Results For all patients, the central corneal thickness (CCT) and the incisional corneal thickness (ICT) increased significantly 1 day after surgery ( CCT increased 99. 59 μm, ICT increased 234. 57 μm;P = O. 490). At 1 month, the CCT almost had returned to baseline, but the ICT had been ticker about 19. 25 μm than baseline (P=0. 001) . The measurements of ACD, AODS00, AOD750, TISAS00, TISA750 also increased significantly 1 day after surgery. Although the ACD had no changes within 2 weeks( all P <0.05), it had been not stable. The changes of the width of the anterior chamber had been stable in the early period after surgery ( all P>0. 05). Conclusion The SL-OCT could impersonality and quantificationally evaluate the anterior segment changes induced by cataract surgery.  相似文献   

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