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双语推荐：角膜缘白到白距离

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目的比较两种眼前段检查仪 Pentacam 和 Orbscan I 测量前房深度(ACD)、角膜缘白到白距离(WTW)的差异,分析二者的一致性,为临床应用提供依据.方法前瞻性临床研究.近视患者72例(144眼),分别使用 Pentacam 和 Orbscan I 测量.两种仪器检测数据差异采用配对 t 检验,数据的相关性采用 Pearson 相关分析.结果72例等效球镜为-2.0~-14.0 D,平均-6.40±2.38D,Pentacam 和 Orbscan I 测量 ACD 的平均值分别为3.22±0.255mm 和3.13±0.253mm,差异具有统计学意义(t=19.172,p=0.000);测量 WTW 的平均值分别为11.66±0.340mm 和11.46±0.306mm,差异具有统计学意义(t=20.570,p=0.000).两种仪器测量的前房深度和角膜缘白到白距离均具有相关性(r=0.975,p=0.000;r=0.941,p=0.000)结论 Pentacam 和 Orbscan I 测量眼部无器质性疾病人群的前房深度和角膜缘白到白距离具有较好的相关性,Pentacam 的测量结果略大于 Orbscan I.
Objective To compare the results of anterior chamber depth and cornea diameter measured by Pentacam and Orbscan I. Methods A clinical prospective studies, the anterior chamber depth and cornea diameter of 72 myopia patients(144 eyes) were measured by Pentacam and Orbscan I respectively. The difference of data measured by two instruments was analyzed by paried t- test, and the relative was analyzed by Pearson correlation analysis.Results The equivalent power of 144 eyes was -2.0 ~ -14.0D, the average was-6.40 ± 2.38D(mean ± SD). The value of anterior chamber depth measured by Pentacam was 3.22 ± 0.255mm, measured by Orbscan I was 3.13 ± 0.253mm, there was significant difference between them (t=19.172,p=0.000) and significant correlation between them (r=0.975,p=0.000). The value of cornea diameter measured by Pentacam was 11.66 ± 0.340mm, measured by Orbscan I was 11.46 ± 0.306mm, there was significant difference between them (t=20.570,p=0.000) and significant correlation

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比较Lenstar 900与A型超声和角膜曲率计在白内障患者眼生物学测量中测量眼轴长度(AL)、前房深度(ACD)及角膜曲率(K1,K2,Km)上的差异,并分析其一致性,为Lenstar 900临床应用提供参考。方法:选取接受白内障手术的患者36例50眼,晶状体核均在Ⅳ级以下,术前分别采用Lenstar 900、A超和角膜曲率计完成AL,ACD和K1,K2,Km的测量,比较测量结果的差异采用配对t检验,测量结果的相关性采用Pearson相关分析,测量结果的一致性采用Bland—Ahamn统计分析。结果:Lenstar 900与A型超声测量AL和ACD值之间的差异无统计学意义(P0.05)。Lenstar 900与角膜曲率计测量Kl,K2和Km值的差异均无统计学意义(P0.05)。Lenstar 900与A型超声和角膜曲率计测量的所有参数均具有密切的线性相关(r0.9,P0.05),Bland—Ahamn统计分析一致性良好。结论:Lenstar 900与A型超声和角膜曲率计对白内障患者术前生物学测量结果准备可靠,可以相互替代,但是Lenstar 900不仅可以一次完成对AL、ACD和角膜曲率的测量,而且同时可以获得角膜厚度、晶状体厚度、角膜缘白到白距离、瞳孔大小、光轴的偏心率及视网膜厚度等参数,具有测量过程非接触、方便快捷、节约时间等优点,具有广泛的应用前景。
AIM:To investigate the differences among Lenstar 900, A-scan ultrasound and keratometer in measurement of axial length ( AL ) , anterior chamber depth ( ACD ) and corneal curvature ( K1 , K2 , Km ) , and evaluate the consistency of the instruments, with the purpose providing references for the clinical application of Lenstar 900. METHODS: In this study we picked up 36 patients ( 50 eyes ) underwent cataract surgery, and lens nucleus hardness were under level IV. Before the operation, AL, ACD and K1 , K2 , Km were measured by Lenstar 900, A-scan ultrasound and keratometer respectively. The differences between the results were compared by the paired t-test. The correlation of the results was analyzed by Pearson correlation analysis, and the consistency was measured by Bland-Ahamn method. RESULTS: The mean AL and ACD values measured by Lenstar 900 and A-scan ultrasound had no significantly statistic differences (P>0. 05). The K1, K2, Km measured by Lenstar 900 and keratometer were not sig

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背景 近视屈光手术的开展需要我们对患者眼前节的数据进行精确测量和评估.目前临床上有多种仪器和方法可以对患者的眼前节进行生物学测量,但是哪种方法更为精确和方便,仍需进一步探讨.目的 比较眼前节光学相干断层扫描(AS-OCT)、OrbscanⅡ、超声生物测厚仪对近视患者眼前节参数的测量结果.方法 回顾性分析2011年11月至2012年5月于浙江大学医学院附属第二医院眼科中心就诊的拟行角膜屈光手术的近视患者70例140眼,受检者等效球镜度为-0.75 ～-10.25 D.分别用AS-OCT、OrbscanⅡ和超声角膜测厚仪测量角膜中央厚度(CCT),用AS-OCT测量前房深度(ACD)和前房角间距(ATA),用OrbscanⅡ测量ACD和角膜白到白距离(WTW),对3种测量仪器的测量结果进行比较. 结果 AS-OCT、超声角膜测厚仪和OrbscanⅡ测量的平均CCT值分别为(516.57±30.25)、(523.68±31.87)和(514.69±38.40) μm,3种测量仪器间测量结果的总体比较差异无统计学意义(F=2.775,P=0.063).根据超声角膜测厚仪所测的CCT结果将受检者分为＜500μm组、500 ～ 569 μm组和≥570 μm组,＜500 μm组受检者以超声角膜测厚仪测量的CCT值最高,OrbscanⅡ测量值最低,用3种方法测量的CCT值差异有统计学意义(F=22.236,P=0.000);AS-OCT和超
Background It is essential to measure and assess the parameters of ocular anterior segment for refractive surgery in myopic eyes.Some different imaging devices can be used for biometric measurement of ocular anterior segment,but which is more accurate and convenient is still under investigation.Objective This study was to compare the anterior segment parameters in myopic eyes measured by anterior segment optical coherence tomography (AS-OCT),Orbscan topography and ultrasonic pachymetry (US).Methods One hundred and forty eyes of 70 myopic subjects with the diopter of-0.75 to-10.25 D,who intended to receive corneal refractive surgery in the Second Affiliated Hospital of Zhejiang University School of Medicine from November 2011 to May 2012,were retrospectively analyzed.Central corneal thickness (CCT) was measured using AS-OCT,Orbscan Ⅱ and US,respectively,and anterior chamber depth (ACD) was measured by AS-OCT and Orbscan Ⅱ,and the angle to angle (ATA) distance and corneal whi

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目的 研究高度近视眼植入有晶状体眼后房型人工晶状体(PPC-ICL)后前房角(ACA)的变化及其相关因素.方法 前瞻性研究.收集2013年3月至2014年4月在上海交通大学医学院附属第九人民医院行PPC-ICL植入手术的中高度近视患者26例(45眼).术后平均随访(4.3±3.2)个月.Pentacam测量术前及术后ACA、前房深度、角膜曲率、PPC-ICL拱高(vault).IOLMaster测量白到白距离和眼轴长度.同时记录术前及术后UCVA、等效球镜度及IOP.采用配对t检验、Wilcoxon符号秩和检验、Pearson相关、Spearman秩相关、多元回归分析进行数据分析.结果 3点方位术后ACA宽度为27.44°-±5.24°,与术前43.23°±5.72°比较,差异有统计学意义(Z=-5.841,P＜0.01).3点方位ACA宽度的变化量与PPC-ICL拱高、同方位术前ACA宽度呈正相关(r=0.556、0.530,P＜0.01),术后ACA宽度与拱高、术前ACA宽度回归方程为ACA术后=4.860-0.009 vault±0.621 ACA术前(F=20.032,P＜0.01).9点方位ACA宽度术后为26.82°±4.73°,与术前42.40°±5.81°比较,差异有统计学意义(t=20.890,P＜0.01);9点方位ACA宽度的变化量与PPC-ICL拱高、同方位术前ACA宽度呈正相关(r=0.581、0.626,P＜0.01),术后ACA宽度和拱高、术前ACA宽度回归方程为ACA术后=5
Objective To investigate the change in the anterior chamber angle and to analyze its related factors of phakic posterior chamber implantable collamer lens (PPC-ICL) implantation.Methods Twenty-six moderate and high myopic patients (45 eyes) who received PPC-ICL implants from March 2013 to April 2014 were included in this prospective study.The mean follow-up time was 4.3±3.2 months.Anterior chamber angle (ACA),anterior chamber depth (ACD),corneal curvature,and vault were measured with a Pentacam preoperatively and postoperatively.Corneal horizontal diameter and axial length (AL) were measured with IOLMaster.Visual acuity (VA),spherical equivalent (SE) and intraocular pressure were recorded preoperatively and postoperatively.The data were analyzed with a matching t test,Wilcoxon signed rank test,Pearson correlation analysis,Spearman rank correlation and multiple regression analysis.Results The ACAs at 3:00 preoperatively and postoperatively were 43.23°±5.72° and 27.44°±5.

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目的 评估新型光学生物测量仪Lenstar测量白内障患者眼球生物结构参数和IOL度数计算的准确性,并研究散瞳对其测量结果的影响.方法 前瞻性临床研究.应用Lenstar和IOLMaster分别对76例（76眼）年龄相关性白内障患者散瞳前后的眼轴长度（AL）、角膜曲率（K1和K2）、前房深度（ACD）及白到白距离（WTW）进行测量,并利用SRK-T、Hollday 1、Hoffer Q和Haigis 4种公式计算IOL度数.同一医生完成所有的测量,2个仪器测量顺序随机.散瞳前2个仪器的测量结果的差异性和一致性及散瞳后2个仪器的测量结果的差异性和一致性分别做配对t检验和Bland-Altman分析;对散瞳前后2个仪器测量结果及IOL度数的比较采用Pearson相关分析和配对t检验.结果 Lenstar 和IOLMaster散瞳前后测量的AL、K1、K2均高度相关（r均＞0.90）.2种仪器散瞳后测量的ACD和WTW值[Lenstar：（3.13±0.34）mm和（11.76±0.51）mm; IOLMaster：（3.15 ±0.34）mm和（12.15±0.47）mm]均大于散瞳前[Lenstar：（3.05 ±0.35） mm和（11.56±0.55）mm;IOLMaster：（3.03±0.34）mm和（11.85±0.44）mm],且差异具有统计学意义（t=-3.98、-5.09、-9.00、-6.52,P＜0.01）.2种方法测量的WTW的95％LoA散瞳前为-1.20～0.61 mm,散瞳后为-1.09～0.33 mm,一致性较差,其余参数一致性较好.散瞳后Haigis公式依据IOLMaster测量结果计算的IOL度数比散瞳前大（0.08±0.29）D,差异有统计学意义（t=-2.31,P＜0.05）.结论 Lenstar是一种精确性高的眼球生物参数测量和IOL度数计算工具,可替代IOLMaster行白内障术前检查.散瞳影响ACD和WTW的测量,但对IOL度数的计算影响很小.
Objective To evaluate ocular biometry measurements and intraocular lens (IOL) power calculation with the new optical biometry Lenstar,and to review the effect of cycloplegia on biometric parameters and IOL power calculation on patients with cataracts.Methods In this prospective,comparative,observational study of ocular measurements on 76 cataracts,measurements of axial length (AL),corneal curvature (K1,K2),anterior chamber depth (ACD) and white to white (WTW) were performed by a single operator using the Lenstar and the IOLMaster before and after pupil dilation.The sequence of the measurements pre-and post-cycloplegia between the two devices was randomized.Pre-and post-cycloplegic IOL power were performed with 4 formulas (Sanders-Retzlaff-Kraff/Thoretical,Holloday 1,Hoffer Q and Haigis) using an A constant of 118.0.The refractive target was post-operative emmetropia.Bland-Altman plots were applied to evaluate the agreement and differences between the two devices.The differences between

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