STRATUS型与2000型相干光断层扫描仪测量视网膜神经纤维层厚度的比较

目的 比较Stratus型与2000型相干光断层扫描(OCT)仪测量视网膜神经纤维层(RNFL)厚度的可靠性.设计 前瞻性横断面研究.研究对象 正常人43眼,可疑原发性开角型青光眼(POAG)43眼,POAG 21眼.方法 分别用Stratus型与2000型OCT仪检测每例受试者一眼,对两代仪器测量的视网膜四个象限RNFL厚度及其全周平均值进行比较并进行线性回归分析.主要指标 RFLL厚度.结果 两代仪器测量正常人、可疑POAG和POAG的RNFL厚度,在大部分象限和全周平均RNFL厚度值均无显著差异(P＞0.05);正常人的鼻侧象限、可疑POAG的鼻侧象限和全周平均RNFL厚度值Stratus型比2000型显著较厚.两代仪器测量的各象限和平均RNFL厚度值均呈直线相关,其中平均RNFL厚度值相关性最好(r=0.905).结论 Stratus型与2000型OCT仪测量的RNFL厚度值直线相关性好,两者可通过直线回归方程互相预测.(眼科,2008,17:29-32)     

光学相干断层扫描仪不同扫描程序测量视网膜神经纤维层厚度的比较

目的 探讨光学相干断层扫描仪(STRATUS OCT,OCT3)不同扫描程序对视网膜神经纤维层(RNFL)厚度测量 的影响。设计 前瞻性、病例对照研究。 研究对象 正常人38例72眼,原发性开角型青光眼(POAG)患者19例34眼。方法 所有被检查者分别用OCT3常规扫描程序(RNFL Thickness 3_4)和个性化扫描程序(RNFL Thickness 2．27×disc)进行检 查,比较两种程序测量RNFL厚度的结果。对两种扫描方式各象限RNFL厚度及其全周平均值进行对比;分别计算两种扫描程 序测量RNFL厚度值的ROC曲线下面积,以了解其诊断青光眼的准确性;并分别对两种扫描程序测量RNFL厚度值与 Humphery视野的平均偏差(MD)进行线性回归分析。主要指标 视网膜各象限及全周平均RNFL厚度;Humphery视野平均偏 差。 结果 正常人常规扫描的颞侧、上方、鼻侧、下方、平均的RNFL厚度分别为(75．36±13．22)μm、(122．11±16．78)μm、 (70．76±13．25)μm、(125．06±14．43)μm、(98．40±9．62)μm,而个性化扫描相应的RNFL厚度分别是(77．04±12．44)μm、 (121．99±13．86)μm、(70．76±13．50)μm、(124．26±16．05)μm、(99．42±9．08)μm,两种方式进行比较,差异无显著性(P值为 O．053-1．000)。POAG患者常规扫描的颞侧、上方、鼻侧、下方、平均的RNFL厚度分别为(65．12±13．10)μm、(92．59±21．93)μm、 (59．97±12．36)μm、(73．59±22．48)μm、(72．79±9．51)μm,而个性化扫描相应的RNFL厚度分别是(63．64±13．16)μm、 (90．52±19．44)μm、(59．91±13．52)μm、(73．86±23．34)μm、(73．32±9．54)μm,两种扫描程序比较,除颞侧有显著性差异(P= O．031)外,其余各方位及全周平均值差异无显著性(P值为0．107-0．954)。两种扫描程序测量RNFL厚度的ROC曲线下面积在 全周平均及下方最大,为0．959-0．973。颞侧、上方、下方及全周平均RNFL厚度与视野MD显著相关(P<0．05)。 结论 应用 OCT3测量RNFL厚度,常规扫描和个性化扫描均可准确地测量RNFL厚度,对青光眼有较高的诊断价值。     

原发性开角型青光眼与慢性原发性闭角型青光眼视网膜神经纤维层厚度与视野缺损的关系

目的 探讨原发性开角型青光眼(primary open-angle glaucoma,POAG)和慢性原发性闭角型青光眼(chronic primary angle-closure glaucoma,CPACG)患者频域光学相干断层扫描(optical coherence tomography,OCT)检测的视网膜神经纤维层(retinal nerve fiber layer,RNFL)厚度与视野平均缺损(mean defect,MD)的相关性.方法 采用RTVue100-2频域OCT和OCTO-PUS101视野计对POAG患者22例(22眼)及CPACG患者22例(22眼)进行检测,将两组患者RNFL厚度及视野MD值进行比较,应用Pearson积矩相关分析法确定RNFL厚度与视野MD值、上方和下方RNFL厚度与相对应半侧视野MD值的相关性.结果 POAG患者RNFL厚度、上方RNFL厚度及下方RNFL厚度分别为(91.19±15.85)μm、(94.93±18.76) μm、(87.82±15.65) μm,CPACG患者相应的RNFL厚度分别为(88.22±13.01) μm、(90.41±14.16)μm、(86.49±16.63) μm,两组患者各RNFL参数的比较差异均无统计学意义(均为P＞0.05).POAG组总MD值、上方半侧视野MD值、下方半侧视野MD值分别为(8.41±6.07)dB、(8.46±5.39)dB、(6.79±6.67) dB,CPACG组相应的MD值分别为(10.69±3.76) dB、(11.17±3.52) dB、(9.71±5.86)dB,两组患者各MD参数比较,差异均无统计学意义(均为P＞0.05).POAG组总RNFL厚度、上方RNFL厚度及下方RNFL厚度与视野相对应区域MD值呈中度负相关(r分别为:-0.574、-0.464、-0.600,均为P＜0.05),CPACG组总RNFL厚度、上方RNFL厚度及下方RNFL厚度与视野相应区域MD值呈高度负相关(r分别为-0.819、-0.884、-0.812,均为P =0.000);两组患者RNFL厚度与MD的相关系数和下方RNFL厚度与上方半侧视野MD的相关系数的差异均无统计学意义(P＞0.05),两组患者上方RNFL厚度与下方半侧视野MD的相关系数的差异有统计学意义(P＜0.05).结论 POAG患者RNFL厚度与视野MD呈中度负相关,CPACG患者RNFL厚度与视野MD呈高度负相关;相对于POAG患者,CPACG患者上方RNFL厚度与下方半侧视野MD具有更好的相关性.     

OCT检测原发性开角型青光眼视网膜神经纤维层厚度与视野平均缺损的相关性分析

目的探讨OCT检测原发性开角型青光眼(POAG)视网膜神经纤维层厚度(RNFL)与视野平均缺损(MD)的相关性。方法分别采用Ze iss-Humphrey,Stratus TM,Version3.0 OCT和OCTOPUS101全自动电脑视野分析仪对正常组25例(36只眼)和青光眼组52例(81只眼)进行检测,将各个青光眼组中心30°视野内全视网膜MD和OCT检测的RNFL厚度值进行比较,并做相关性分析。结果青光眼组MD均高于正常组(P<0.01),中期和晚期青光眼组RNFL值均低于正常组(P<0.05)。所有被检测者视野MD与RNFL厚度呈负的直线相关(相关系数为-0.626,P=0.000);青光眼组MD与RNFL厚度呈负的直线相关(相关系数为-0.615,P=0.000);正常组MD与RNFL厚度无直线相关性(相关系数为-0.022,P=0.910)。结论MD与RNFL厚度有很好的直线相关性,通过OCT对RNFL厚度的检测,有助于了解和监测POAG对RNFL的损伤,是一种很有价值和潜力的青光眼客观辅助诊断方法。     

应用SD-OCT纵向比较正常人群和青光眼进展及非进展人群的RNFL厚度

目的：应用频域光学相干断层扫描（ spectral－domain optical coherence tomography ,SD－OCT）纵向比较正常人群、青光眼进展及非进展人群的视网膜神经纤维层（ retinal nerve fiber layer ,RNFL）厚度。方法：应用SD－OCT对36例POAG患者和24例正常人监测RNFL厚度。受试者行视盘OCT、眼底照相及视野检查,每6mo一次,随访2a,至少有4次可信的OCT检查结果。根据视野及眼底照相结果将POAG患者划分为进展组和非进展组。分析各组RNFL厚度变化差异,同视野参数变化值做相关性分析。结果：平均随访2．1±0．3 a。17例被确定为POAG进展组。POAG进展组平均RNFL厚度损失速率明显高于POAG非进展组（2．46μm／a vs 1．21μm／a,P＜0．001）。下方RNFL厚度变化同视野平均偏差（ mean deviation ,MD）变化相关性最佳（r＝0．423,P＝0．03）。结论：应用SD－OCT纵向监测RNFL厚度, POAG进展者RNFL厚度丢失速率明显增高,下方RNFL厚度参数变化可能在监测中意义较大。     

RTVue OCT、GDx VCC和HRT-Ⅲ视网膜神经纤维层厚度参数在青光眼诊断中的作用

目的 探讨应用频域光学相干断层扫描(spectral-domain optical coherence tomography,SD-OCT)-RTVue OCT、偏振激光扫描(scanning laser polarimetry,SLP)-偏振光青光眼检测联合个性化角膜补偿系统(glaucoma detection with variable corneal compensation.GDx VCC)和海德堡视网膜断层扫描-Ⅲ(Heidelberg retina tomography-Ⅲ,HRT-Ⅲ)测量所得的视网膜神经纤维层(retinal nerve fiber layer,RNFL)厚度参数在青光眼诊断中的作用.方法 应用RTVue OCT、GDx VCC和HRT-Ⅲ分别测量62人正常个体和72例青光眼患者总的以及各区域的RNFL厚度,比较正常个体和青光眼患者RNFL厚度.用受试者工作特性曲线下面积(area under the receiver operating characteristic curve,AUC)来评价每一个参数区分正常眼与青光眼的能力大小.结果 正常个体和青光眼患者各参数测量值(总的及各区域RNFL厚度)之间比较,差异均有统计学意义(均为P<0.001).平均RNFL厚度RITue OCT正常个体为(109.758±9.095)μm,青光眼患者为(80.455±19.353)μm;GDx VCC正常个体为(57.013±5.132)μm,青光眼患者为(45.374±10.417)μm;HRT-Ⅲ正常个体为(295.833±69.485)μm,青光眼患者为(201.385±105.235)μm.各测量参数中,诊断效能最高的是RTvue OCT测得的平均RNFL厚度,其AUC值为0.914±0.026,最低的是颞侧TU和TL区域,其AUC分别为0.783±0.040和0.805±0.039.结论 RTVue OCT测得RNFL厚度参数具有很好的区别正常个体和青光眼患者的能力,在青光眼诊断方面是一个有用的工具.     

频域OCT检测RNFL厚度在原发性青光眼早期诊断中的意义

目的 应用频域光学相干断层成像技术(optical coherence tomography,OCT)检测CACG和POAG患者的视网膜神经纤维层(retinal nerve fiber layer,RNFL)厚度,探讨其与视野平均缺损(mean defect,MD)的相关性,并揭示早期原发性青光眼RNFL厚度的特征性改变,从而客观评价频域OCT在原发性青光眼早期诊断中的临床应用价值.方法 分别采用Zeiss Cirrus HD-OCT 4000型和Zeiss Humphrey 750型全自动视野计对正常组20例(40只眼)和分成早期、中期、晚期的原发性青光眼组30例(52只眼)进行检测,将各个青光眼组中心30°视野内的MD和OCT检测的RNFL厚度进行比较,并做相关性分析.结果 青光眼组RNFL厚度及视野MD程度与正常对照组差异均有统计学意义,其中正常人RNFL厚度为(112.91±9.36)μm,早期青光眼组为(94.43±7.67) μm,中期青光眼组为(80.82±10.36) μm,晚期青光眼组为(67.86±8.01)μm;正常人视野MD为(-0.88±1.53)dB,早期青光眼组为(-4.26±1.83)dB,中期青光眼组为(-7.43±2.64)dB,晚期青光眼组为(-17.06±5.85) dB.青光眼组RNFL与视野MD具有负相关,其中早期青光眼组相关系数为-0.537;中期青光眼组为-0.615;晚期青光眼组为-0.804.早期青光眼组各象限RNFL厚度为:上方(116.32±11.65) μm;下方(105.58±9.73)μm;鼻侧(75.40±10.91)μm;颞侧(70.28±13.08) μm.B组各象限RNFL厚度分别为:上方(140.15±8.79)μm;下方(137.29±10.07) μm;鼻侧(90.20±14.19) μm;颞侧(88.43±10.85)μm.经独立样本t检验A1组与B组上方及下方RNFL厚度差异有统计学意义(P＜0.05),而鼻侧及颞侧差异无统计学意义(P＞0.05).结论 (1)频域OCT检测各期原发性青光眼患者的RNFL平均厚度随病程进展逐渐变薄.(2).频域OCT检测原发性青光眼患者的RNFL平均厚度与视野MD具有负相关性,能够客观地反应出青光眼视神经损害程度.(3)早期原发性青光眼患者中上方、下方RNFL厚度均已明显变薄,通过频域OCT对上述两个RNFL厚度参数的检测,有助于更早地发现原发性青光眼的视神经损害,为青光眼的早期诊断带来一定的临床应用价值.     

高度近视RNFL厚度在诊断原发性开角型青光眼中的临床意义

目的 评估光学相干断层成像术(Optical Coherence Tomography,OCT)定量测量视网膜神经纤维层厚度(Retinal Nerve Fiber Layer,RNFL)在诊断高度近视合并原发性开角型青光眼(primary open-angleglaucoma,POAG)中的临床意义.方法 收集高度近视患者(屈光度≥-6.00D)共40例73只眼,分为单纯高度近视组(A组)及高度近视合并POAG组(B组),所有的患者均行眼压、前房角镜、全自动视野及OCT检查.结果 (1)A组患者平均眼压(16.57±2.43)mmHg,视野检查平均敏感度(MS)23.63±3.70;OCT检查RNFL平均厚度(单位μm)分别为上象限:117.64±15.78,下象限:126.05±22.55,鼻象限:95.69±34.99,颞象限:100.1±27.25;(2)B组患者平均眼压为(26.45±6.02)mmHg,视野检查平均敏感度(MS)15.41±7.63;OCT检查RNFL平均厚度(单位μm)分别为上象限:99.38±36.39,下象限:95.10±33.85,鼻象限:68.00±17.56,颞象限:70.62±25.57.(3)分别对两组RNFL各象限厚度值进行t检验,结果显示两组间差异显著均有统计学意义(P＜0.01).结论 正确评估高度近视RNFL的定量测量在原发性开角型青光眼早期诊断中具有重要意义.     

OCT检测原发性开角型青光眼神经纤维层厚度与视野光敏感度相关性分析

目的探讨光学相干断层成像（optical coherence tomography,OCT）检测原发性开角型青光眼（primary open angle glaucoma,POAG）视网膜神经纤维层（retinal nerve fiber layer,RNFL）厚度与视野光敏感度均值（meansensitivity,MS）的相关性。方法分别采用Zeiss-Humphrey,Stratus TM,Version3.0OCT和OCTOPUS101全自动电脑视野分析仪中对正常组患者（25例30眼）和POAG组患者（52例81眼）进行检测,将各个POAG组中心30°视野内全视网膜MS和OCT检测的RNFL厚度值与正常组进行比较,并做相关性分析。结果早、中期和晚期POAG组MS分别为（22.13±1.96）dB、（18.22±2.66）dB、（12.75±4.05）dB均低于正常组（26.55±2.11）dB,P〈0.05;中期和晚期POAG组RNFL值（87.95±15.60）μm、（65.31±15.88）μm均低于正常组（99.65±12.17）μm,P〈0.05;早期POAG组总RNFL值虽低于正常组,但与正常组相比差异无统计学意义（P〉0.05）。将其RNFL厚度测量值按4个象限进行独立分析,发现在早期PO-AG组其颞上（95.06±23.46）μm和颞下（92.52±24.31）μmRNFL值与正常组（106.37±16.12）μm、（107.32±12.70）μm分别相比差异有统计学意义（P〈0.05）。所有被检测者视野MS与RNFL厚度呈正的直线相关（r=0.648,P=0.000）;POAG组MS与RNFL厚度呈正的直线相关（r=0.634,P=0.000）;正常组MS与RNFL厚度无直线相关性（r=0.263,P=0.168）。结论MS与RNFL厚度有很好的直线相关性,通过OCT对RNFL厚度的检测,有助于了解和监测POAG对RNFL的损伤,是一种很有价值和潜力的POAG客观辅助诊断方法。     

视网膜神经节细胞复合体厚度检测对原发性开角型青光眼的诊断意义

目的比较视网膜黄斑区神经节细胞复合体(GCC)厚度和视盘周围视网膜神经纤维层(p RNFL)厚度各单项指标及两者联合后指标对原发性开角型青光眼(POAG)的诊断价值。设计诊断方法评价。研究对象挪威特罗姆瑟眼病中心2013年10月至2014年3月就诊者的正常人40眼,POAG 66眼。其中早期青光眼(EG)34眼、中晚期青光眼(AG)32眼。方法所有受试眼均进行频域相干光断层扫描(i Vue 100 SD-OCT)GCC模式及ONH模式扫描检测。通过比较各参数受试者曲线下面积(AUCs)来评估其诊断能力。主要指标黄斑区GCC厚度及p RNFL厚度的AUCs值。结果所有眼全周GCC厚度与全周p RNFL厚度具有强相关性。青光眼组全周GCC厚度(EG 81.03±6.37μm,AG 76.28±9.39μm)和p RNFL厚度(EG 80.47±9.02μm,AG 69.84±11.74μm)较正常组(GCC 92.90±6.07μm,p RNFL 96.98±8.09μm)显著变薄(P均<0.05)。校正年龄后,具有最高诊断能力的指标在EG组是上方GCC厚度(AUC=0.929),AG组是全周p RNFL厚度(AUC=0.988)。以全周p RNFL厚度为参照,EG组中全周GCC厚度及全周p RNFL厚度回归联合后诊断能力提高,但无统计学意义;AG组中,全周GCC厚度及全周p RNFL厚度并联后灵敏度显著提高(P<0.05)。结论采用SD-OCT测量法,GCC厚度在各期POAG中均具有与p RNFL厚度相当的、较高的诊断能力。AG组中,全周GCC厚度及全周p RNFL厚度联合可能提高诊断灵敏度。     

Comparability of retinal nerve fiber layer thickness measurements of optical coherence tomography instruments

PURPOSE: To compare retinal nerve fiber layer (RNFL) measurements between two ocular coherence tomography (OCT) instruments (OCT 2000 and Stratus OCT; Carl Zeiss Meditec, Dublin, CA) and compare their diagnostic precision. METHODS: One hundred thirty-nine consecutive subjects were imaged (3 x 3.4-mm diameter circular scans) on the same day with each instrument. Thirty-five patients were excluded due to poor-quality images. RNFL thicknesses measured by the two instruments were compared, and receiver operating characteristic (ROC) curves were used to determine diagnostic precision. RESULTS: A randomly selected eye of each of 104 participants (28 with open-angle glaucoma, 40 with suspected glaucoma, and 36 healthy subjects) was analyzed. RNFL thickness measurements generally were thicker with OCT 2000 than with Stratus OCT. The difference in global RNFL thickness between instruments was within 20 microm in 66 (65%) of subjects and within 10 microm (the instrument's limit of resolution) in 25 (25%) subjects. Application of a correction factor to OCT 2000 measurements predicted Stratus OCT RNFL thickness within 10 microm of the observed measurement in 75% of the eyes. For both instruments, highest ROC curve areas (better discrimination between glaucomatous and normal eyes) were found in the inferior sector. Discrimination using global RNFL thickness was better with Stratus OCT than OCT 2000 (P = 0.043). CONCLUSIONS: RNFL thickness measurements measured by OCT 2000 can be approximated to measurements made by Stratus OCT using correction factors calculated by this study. However, there remains considerable variability that exceeds the limits of resolution afforded by the instruments themselves. Therefore comparisons between instruments using these approximations should be interpreted with caution.     

The Study of Retinal Nerve Fiber Layer Thickness of Normal Eyes Using Scanning Laser Polarimetry

Purpoe: To evaluate retinal nerve fiber layer (RNFL) thickness measurements in local normal Chinese subjects of different age groups and analyse the correlation of RNFL thickness with age using scanning laser polarimetry (SLP, GDxVCC). To assess the reproducibility of RNFL thickness measurement with GDxVCC.Methods: The RNFL thickness of 67 normal subjects (123 eyes) were measured by GDxVCC. The average TSNIT parameters were calculated. The differences of RNFL thickness between sex, right and left eyes, superior and inferior were compared. The relationship between RNFL thickness and age was analyzed with correlation analysis and linear regression analysis. The intraclass correlation coefficients (ICC) of three images in every eye were calculated.Results: The average peripapillary RNFL thickness at the superior, inferior and whole ellipse regions in 123 eyes of 67 normal subjects were (70.30±6.76)μm, (67.35±6.77) μm and (56.87±4.53) μm, respectively. The average TNSIT standard deviation was 23.68±4.61 and the average inter-eye symmetric value was 0.86±0.11. There were significant difference of RNFL thickness between superior and inferior (t=4.952,P ＜0.001 ). There were significant difference of inferior RNFL thickness and TNSIT standard deviation between right and left eyes (P=0.005 and 0.002),while not significant difference of superior RNFL thickness and whole mean RNFL thickness between right and left eye (P=0.086 and 0.529). There was no significant difference in TSNIT parameters between different genders. There was a slight negative correlation average RNFL thickness in superior sector with age (decreased approximately 0.15 microns per year,P=0.047) in the subjects aged below 60 years old. The ICC values of RNFL thickness were ＞0.8 in superior, inferior and global.Conclusions: The RNFL thickness can be measured accurately by GDxVCC and the reproducibility of RNFL thickness measurement by GDxVCC is good. There was a slight negative correlation between average RNFL thickness in superior with age. More researches on the effects of age on RNFL thickness by GDxVCC are needed.     

Comparison of retinal nerve fiber layer thickness between Stratus and Spectralis OCT

Purpose

To compare the peripapillary retinal nerve fiber layer (RNFL) thickness of normal patients and those with various glaucoma diseases by time domain (Stratus) and spectral domain (Spectralis) optical coherence tomography (OCT).

Methods

The RNFL thickness as measured by the Stratus and Spectral OCT was compared (paired t-test). The relationship and agreement of RNFL thickness between the two OCT modalities were evaluated by Pearson correlation, Bland-Altman plot, and area under the receiver operating characteristic curve.

Results

Two-hundred seventeen eyes of 217 patients, including twenty-four normal eyes, ninety-one glaucoma suspects, seventy-six normal tension glaucoma cases, and twenty-six primary open angle glaucoma cases (POAG) were analyzed. The peripapillary RNFL thicknesses as measured by Stratus OCT were significantly greater than those measured by Spectralis OCT. However, in quadrant comparisons, the temporal RNFL thickness obtained using Stratus OCT were significantly less than those obtained using Spectralis OCT. Correlations between RNFL parameters were strong (Pearson correlation coefficient for mean RNFL thickness = 0.88); a high degree of correlation was found in the POAG group. Bland-Altman plotting demonstrated that agreement in the temporal quadrant was greater than any other quadrant.

Conclusions

Both OCT systems were highly correlated and demonstrated strong agreement. However, absolute measurements of peripapillary RNFL thickness differed between Stratus OCT and Spectralis OCT. Thus, measurements with these instruments should not be considered interchangeable. The temporal quadrant was the only sector where RNFL thickness as measured by Spectralis OCT was greater than by Stratus OCT; this demonstrated greater agreement than other sectors.     

频域OCT对正常人和青光眼光感受器细胞层厚度的检测

背景青光眼以视网膜内层的神经节细胞丢失为主要病理特征,但其是否累及视网膜外层尚有争议。部分研究认为青光眼将导致视网膜外层（光感受器）功能的异常,而病理学研究得出了不同的结论。目的用频域OCT测量正常人和青光眼患者光感受器细胞层的厚度,探讨青光眼对光感受器细胞层厚度的影响。方法采用病例对照研究。用频域OCT（SDOCT）对正常人38例38眼和青光眼患者48例48眼的黄斑区进行扫描,由一位检测者采用Sigma图像分析软件盲法测量黄斑中心凹和旁中心凹处（中心凹外1．5mm）视网膜光感受器层的厚度。同时采用时域OCT（Stratus OCT）测量所有检测眼的视盘周围视网膜神经纤维层（RNFL）厚度,比较正常组和青光眼组光感受器细胞核层的平均厚度,分析光感受器细胞层厚度与RNFL厚度的关系。结果正常组和青光眼组在黄斑中心凹光感受器细胞核层厚度分别是（96．7±10．7）μm、（103．7±13．3）μm,差异有统计学意义（P=0．011）;中心凹光感受器内节和外节层厚度分别是（59．3±5．5）μm、（59．5±5．5）μm,差异无统计学意义（P=0．890）。正常组和青光眼组在中心凹外3mm处光感受器细胞核层厚度分别是（70．9±14．0）μm、（68．7±10．7）μm,光感受器内节和外节层厚度分别为（45．2±6．4）μm,（43．6±5．5）μm,差异均无统计学意义（P=0．410,P=0．228）。黄斑中心凹处光感受器细胞核层厚度和RNFL厚度两者有二元线性关系（γ=-0．019X。＋2．73X＋10．34,R^2=0．211,P=0．005）。结论青光眼的黄斑中心凹光感受器细胞核层显著增厚,并随病程的变化而改变。     

两种相干光断层扫描仪测量兔眼视网膜厚度和组织学检查的对比研究

目的探讨兔眼视网膜厚度的国产与进口Stratus相干光断层扫描（OCT）仪检测与组织学检查值之间的相关性。设计实验研究。研究对象15只兔眼。方法先对兔眼的视网膜检测部位进行激光标记定位,分别用国产OSE－1800型OCT实验样机和Stratus OCT扫描并测量该部位的视网膜厚度值,再采用组织学方法检测相应部位的视网膜厚度值,应用SPSS11．5软件统计学对比分析。主要指标视网膜神经上皮层厚度值。结果OSE－1800 OCT测量兔眼视网膜神经上皮层厚度平均值为（122．5±7．4）μm,Stratus OCT测量值为（118．0±5．6）μm,组织学测量值为（116．3±8．8）μm,P=0．292;OSE－1800 OCT与Stratus OCT测量兔眼视网膜神经上皮层厚度的相关系数为0．914（P=0．000）,OSE－1800 OCT与组织学测量值的相关系数为0．872（P=0．001）,OSE－1800 OCT与组织学测量值的相关系数为0．833（P=0．002）。结论OSE－1800型OCT与Stratus OCT均能准确地定量测量兔眼视网膜厚度,它们与组织形态学测量值均有较好的相关性。（眼科,2009,18：239-242）     

Comparison of the Diagnostic Ability of Retinal Nerve Fiber Layer Thickness Measured using Time Domain and Spectral Domain Optical Coherence Tomography in Primary Open Angle Glaucoma

 Purpose: To evaluate and compare the diagnostic ability of retinal nerve fiber layer (RNFL) thickness measurements using time domain (Stratus) and spectral domain (Cirrus HD) optical coherence tomography (OCT) in preperimetric and early primary open angle glaucoma (POAG). Methods: A total 62 eyes of 62 normal subjects, 47 eyes of 47 early perimetric damage POAG patients and 30 eyes of 30 preperimetric glaucoma patients were chosen in the study. All the subjects underwent peripapillary RNFL thickness measurements using Stratus OCT and Cirrus HD-OCT on the same day by a single trained operator. The RNFL thickness measured by Stratus OCT and Cirrus HD-OCT was statistically compared using paired t-tests. The relationship between RNFL thickness measured by two OCT instruments was evaluated using Pearson’s correlation coefficient. Areas under the receiver operating characteristic curves (AROC) were calculated and compared. Results: RNFL thickness measured using Stratus OCT was generally thicker than that using Cirrus HD-OCT(P＜0.05). A highly significant correlation between the two OCT instruments measurements was found in four quadrants and average RNFL thickness measurements (P＜0.001). The average RNFL thickness of Cirrus HD-OCT had significantly (P = 0.006) higher diagnostic ability (AROC = 0.951) than that of Stratus OCT (AROC = 0.881) in preperimetric glaucoma. There were no significant differences between the AROCs for other RNFL thickness parameters from Cirrus HD-OCT and Stratus OCT in preperimetric and early glaucoma (P＞0.05). Conclusion: Significant differences and an excellent correlation were noted in terms of RNFL thickness measurements using Stratus OCT and Cirrus HD-OCT. Cirrus HD-OCT presented higher diagnostic ability for preperimetric glaucoma.     

Comparison of retinal nerve fiber layer and macular thickness measurements with Stratus OCT and OPKO/OTI OCT devices in healthy subjects

AIM: To compare retinal nerve fiber layer (RNFL) and macular thickness measurements obtained with the Stratus optical coherence tomography (OCT) and OPKO/OTI OCT devices. METHODS: Included in the study were 59 eyes of 30 participants. All measurements for each eye were done on the same day with both devices. Student’s paired t-tests were used to compare the central macular thickness and RNFL measurements of the Stratus OCT and OPKO/OTI OCT. Pearson correlation was used to assess the relationship between the devices. Coefficient of variation (COV) was calculated to assess intersession repeatability. RESULTS: Using both the Stratus OCT and OPKO/OTI OCT, respectively, the measured mean average RNFL thicknesses were 98.9±11.1 μm and 115.1±9.6 μm (P=0.001), and the measured mean central retinal thicknesses (CRT) were 196.2±18.8 μm and 204.5±21.1 μm (P<0.001). Measured by the two devices, the RNFL thickness values were correlated in all quadrants, as were the retinal thickness values except the inferior outer sector. COV for average RNFL and CRT thickness were 2.9% and 4.6% for Stratus OCT, and 2.1% and 4.2% for OPKO/OTI OCT, respectively. CONCLUSION: We found good reproducibility of RNFL and retina thickness measurements for both Stratus OCT and OPKO/OTI OCT devices. However, even though the two OCT systems provided statistically correlated results, the values for both RNFL and macular thickness were statistically different. RNFL and macular thickness measurements with the OPKO/OTI OCT were higher than that of the Stratus OCT; therefore, the two OCT systems cannot be used interchangeably for the measurements of RNFL and macular thickness.     

口服弥可保对晚期青光眼术后视野及RNFL厚度的影响

目的:观察和评价口服弥可保对晚期青光眼患者小梁切除术后视野及视网膜神经纤维层(retinal nerve fiber layer,RNFL)厚度的影响。方法:回顾性系列病例研究。收集57例57眼经过手术治疗后解除高眼压状态的晚期青光眼患者,随机分为对照组29例29眼和治疗组28例28眼,对照组患者常规抗青光眼治疗,治疗组患者在对照组基础上口服弥可保6mo,3次/d,500μg/次。分别于出院时,出院后6mo应用Humphrey750i型视野计检测视野平均缺损及视野模式标准差;应用Stratus OCT-3仪(Carl Zeiss Meditec,Dublin,CA)检测平均和各个区域的RNFL厚度。两组间检查指标比较采用独立样本t检验。结果:出院后6mo,视野平均缺损:治疗组-13.30±4.03dB,对照组-18.51±4.33dB,两组比较差异有统计学意义(t=-2.112,P=0.049);视野模式标准差:治疗组为5.64±0.48dB,对照组为8.21±2.47dB,两组比较差异有统计学意义(t=-2.436,P=0.025);RNFL厚度:全周:治疗组75.828±7.260μm,对照组65.037±13.074μm,两组间差异有统计学意义(t=-2.282,P=0.035)。结论:晚期青光眼术后患者长期口服弥可保可对青光眼所致的视野缺损及视网膜神经纤维丢失有明显改善。     

Comparison of ability of time-domain and spectral-domain optical coherence tomography to detect diffuse retinal nerve fiber layer atrophy

Purpose

Our aim was to evaluate and compare diagnostic capabilities of time-domain (Stratus) and spectral-domain (Cirrus) optical coherence tomography (OCT) to detect diffuse retinal nerve fiber layer (RNFL) atrophy.

Methods

This study assessed 101 eyes from 101 glaucoma patients with diffuse RNFL atrophy and 101 eyes from 101 age-matched healthy individuals. Two experienced glaucoma specialists graded red-free RNFL photographs of eyes with diffuse RNFL atrophy using a four-level grading system. The area under the receiver operating characteristic curves (AUC) of normal eyes was compared with that of eyes with diffuse atrophy. Sensitivity and specificity of each OCT device were calculated on the basis of its internal normative database.

Results

The largest AUC for Stratus and Cirrus were obtained for average RNFL thicknesses (0.96 and 0.94, respectively). Comparison of the AUC with different RNFL atrophy grades revealed no significant difference between the two OCT devices. Using an internal normative database at a <5 % level, the overall sensitivity of Stratus ranged from 58.0 to 84.0 %, whereas that of Cirrus ranged from 75.0 to 87.0 %. According to the normative database, the highest Stratus sensitivity was obtained with the temporal–superior–nasal–inferior–temporal (TSNIT) thickness graph, and the highest Cirrus sensitivity with the TSNIT thickness graph and the deviation map.

Conclusions

The AUC obtained from Cirrus were comparable with those from Stratus. On the basis of their normative databases, these devices had similar diagnostic accuracy. Our results suggest that the diagnostic capabilities of the two instruments to detect diffuse RNFL atrophy are similar.     

早期帕金森病患者视网膜神经纤维层厚度变化与视野平均缺损的关系

目的 观察早期帕金森病(PD)患者视网膜神经纤维层(RNFL)厚度的变化及其与视野平均缺损深度(MD)的关系.方法 采用光相干断层扫描(OCT)对临床确诊为早期PD的15例患者15只眼和18名健康人18只眼进行检查.选择内注视方式,以视盘中心为圆心、直径为3.46 mm的环形扫描.扫描分为上方、下方、颞侧、鼻侧、颞上、颞下、鼻上、鼻下8个象限进行,对比分析两组受检者8个象限的RNFL厚度及平均RNFL厚度.采用Humphrey-750全自动视野计对早期PD患者进行中心30-2视野检测,记录MD值,并用直线相关和回归法分析早期PD患者平均RNFL厚度与MD的关系.结果 正常对照组上方、下方、颞侧、鼻侧、颞上、颞下、鼻上、鼻下RNFL厚度和平均RNFL厚度分别为(132.7±17.4)、(141.5±15.3)、(83.7±22.3)、(83.2±17.5)、(120.8±21.2)、(117.9±24.5)、(109.6±20.6)、(110.2±27.7)、(109.9±8.5)μm,早期PD患者上方、下方、颞侧、鼻侧、颞上、颞下、鼻上、鼻下RNFL厚度和平均RNFL厚度分别为(128.1±25.3)、(128.6±13.2)、(68.7±13.5)、(76.5±17.8)、(102.6±23.7)、(103.3±14.1)、(101.2±20.9)、(96.6±15.0)、(102.3±11.9)μm.2组比较,下方、颞侧、颞上、颞下RNFL厚度和平均RNFL厚度差异有统计学意义(t=2.595,2.700,2.330,2.153,2.131;P=0.014,0.011,0.026,0.040,0.041).早期PD患者平均RNFL厚度与MD呈负相关(t=-0.933,P<0.0001).结论 早期PD患者上方、下方、颞侧、鼻侧、颢上、颞下、鼻上、鼻下RNFL厚度较正常者明显变薄;早期PD患者的RNFL厚度与MD值呈负相关.