光学相干断层扫描仪对原发性开角型青光眼患者早期诊断价值

目的探讨光学相干断层扫描仪(OCT)在原发性开角型青光眼(POAG)患者早期诊断中的价值。方法选取2015年4月至2016年4月于张家口市第四医院就诊的50例(50眼)POAG患者为研究对象,分为早期POAG组26例和中晚期POAG组24例,另同期选取30例健康无眼疾体检者为对照组,采用OCT检测3组对象视网膜神经纤维层(RNFL)厚度、视野缺损,测定视盘面积、视杯面积、盘沿面积、视杯容积、盘沿容积等视盘参数,并对3组检测数据进行比较。结果早期POAG组和中晚期POAG组患者上方、下方、鼻侧、颞侧4个视野RNFL厚度均显著低于对照组(P<0.05),中晚期POAG组患者上方、下方、鼻侧、颞侧4个视野RNFL厚度均显著低于早期POAG组(P<0.05);早期POAG组和中晚期POAG组患者上方、下方、鼻侧、颞侧4个视野缺损值均显著高于对照组(P<0.05),中晚期POAG组患者上方、下方、鼻侧、颞侧4个视野缺损值均显著高于早期POAG组(P<0.05);POAG患者视盘面积与对照组比较差异无统计学意义(P>0.05),早期POAG组和中晚期POAG组患者盘沿面积、盘沿容积低于对照组(P<0.05),视杯面积、视杯容积高于对照组(P<0.05),中晚期POAG组患者盘沿面积、盘沿容积显著低于早期POAG组(P<0.05),视杯面积、视杯容积显著高于POAG组(P<0.05)。结论 OCT可真实反映POAG患者RNFL厚度及视盘参数的改变,具有较高的敏感性和特异性,认为RNFL厚度及视盘参数可作为早期POAG诊断的敏感指标。     

原发性开角型青光眼患者视网膜神经纤维层厚度与视野缺损相关性分析

目的:探讨原发性开角型青光眼视网膜神经纤维层厚度(RNFL)OCT测量及与视野缺损(MD)相关性。方法:68例(68眼)单侧原发性开角型青光眼患者为观察组,71例(71眼)正常人群作为对照组(71眼),采用Cirrus OCT对两组患者RNFL进行测量并采用全自动视野分析仪观察患者MD情况。结果:观察组患者RNFL水平明显低于对照组,观察组患者MD绝对值高于对照组,差异均具有统计学意义(t=6.682,17.30;P<0.01);中期青光眼组、晚期青光眼组患者RNFL水平明显低于对照组,随着青光眼患者病程分期的加重,患者RNFL水平明显降低,组间差异均具有统计学意义(P<0.05)。早期青光眼组、中期青光眼组、晚期青光眼组患者MD绝对值水平均高于对照组患者,随着病程的加重,MD损伤程度明显加重,组间差异均具有统计学意义(P<0.05);观察组患者视杯面积、视杯容积、C/D、水平C/D及垂直C/D水平明显高于对照组,而观察组患者盘沿面积、盘沿容积则低于对照组,差异均具有统计学意义(P<0.05);采用Pearson相关性检验分析发现,观察组患者RNFL与MD绝对值水平呈负相关(r=-0.554,P<0.01)。结论:OCT测量RNFL、MD是原发性青光眼诊断的有效检测方法,且两者存在负相关关系。     

视盘三维参数对青光眼视神经损害评价的应用研究

目的通过对海德堡视网膜断层扫描仪Ⅱ型（HRT-Ⅱ）视盘参数与激光扫描偏振仪（GDX）视网膜神经纤维层（RNFL）厚度的相关性分析,探讨HRT-Ⅱ盘沿参数对青光眼视神经损害的评价。方法使用HRT-Ⅱ和GDX仪器对原发性慢性闭角型青光眼患者51例（73眼）,进行视盘参数和RNFL厚度测量,并进行视盘参数与RNFL厚度的相关分析。结果 RNFL厚度与盘沿面积（RA）、盘沿体积（RV）无相关性;RNFL厚度全周平均值与盘沿面积/视盘面积（RA/DA）、盘沿体积/视盘体积（RV/DV）呈正相关（=0.430、0.444,〈0.05）;视神经纤维指数（NFI）与盘沿面积/视盘面积（RA/DA）、盘沿体积/视盘体积（RV/DV）呈负相关（=-0.564、-0.545,〈0.01）;RNFL厚度上方平均值与上方盘沿体积/上方视盘体积（SRV/SDV）呈正相关（=0.472,〈0.05）;RNFL厚度下方平均值与下方盘沿体积/下方视盘体积（IRV/IDV）呈正相关（=0.426,〈0.05）。结论 HRT-Ⅱ视盘参数中,应用盘沿/视盘参数优于直接应用RA、RV参数,应用RV/DV三维参数优于RA/DA参数。     

原发性开角型青光眼与正常眼HRT-Ⅱ视盘形态结构的对比研究

目的探讨Heidelberg视网膜断层扫描仪(HRT-Ⅱ)在原发性开角型青光眼(POAG)早期诊断中的意义。方法用HRT-Ⅱ对早期、进展期POAG30例(48眼)及正常人25例(50眼)的视盘进行断层扫描,获得视盘平均地形图像和视盘结构诸参数,将POAG视盘参数与视野平均缺损(MD)行相关性分析。结果POAG与正常人视盘结构各参数中视盘面积、视杯面积、盘沿面积、杯盘面积比、视杯容积、盘沿容积、平均视杯深度、最大视杯深度、轮廓线高度变化值、视杯形态测量、平均神经纤维层厚度存在明显差异,检测的视野平均缺损与HRT-Ⅱ视盘检测参数具有一致性。结论HRT-Ⅱ能够反映POAG视盘改变,与视野相关性好,为临床早期诊断POAG提供了依据。     

Cirrus HD-OCT检测原发性开角型青光眼视乳头旁视网膜神经纤维层厚度与视野平均缺损相关性分析

目的探讨Cirrus HD-OCT测量原发性开角型青光眼(POAG)视盘旁视网膜神经纤维层(RNFL)厚度与视野缺损的相关性。方法选择2010年5月~2013年12月于中国石油天然气集团公司中心医院确诊的POAG患者62例(80眼)及视力正常人30例(40眼,正常组),POAG患者分为早期POAG组(28例,34眼)、进展期POAG组(22例,26眼)和晚期POAG组(12例,20眼),采用频域Cirrus HD-OCT和Synemed EP-930自动视野计对和POAG患者和正常组分别进行RNFL厚度和视野检测。频域Cirrus HD-OCT检测RNFL厚度采用optic disc cube 200×200模式。视野检测采用Synemed EP-930自动视野计30°-2程序。将各组患者全周平均RNFL厚度及视乳头周围4个象限(上方、下方、鼻侧、颞侧)RNFL厚度进行比较;计算平均RNFL厚度和视野平均缺损的相关性。结果正常组、早期POAG组、进展期POAG组和晚期POAG组平均RNFL厚度分别为(101.10±9.80)、(94.32±14.05)、(82.73±15.21)、(64.57±14.73)μm,而不同阶段的青光眼患者全周平均RNFL厚度及视乳头周围4个象限(上方、下方、鼻侧、颞侧)RNFL厚度均比正常人减少,差异均有高度统计学意义(P<0.01)。随着青光眼病程的发展,RNFL厚度逐渐下降,而且平均RNFL厚度和视野平均缺损(MD)之间呈负相关(r=-0.659,P=0.000)。结论平均RNFL厚度和视野MD呈线性相关。Cirrus HD-OCT测量的RNFL厚度参数,能客观、定量分析POAG对RNFL损伤进展速度,有助于对青光眼的诊断和随访,从而为POAG患者得到更早的早期诊断和用药指导提供帮助。     

应用光学相干光断层成像术检测临床大视杯分析报告

目的:利用OCT测量青少年人群中大视杯者各项参数,分析其变化特征。方法:对53例(106眼)常规检查眼底发现C/D>0.3的青少年行视盘OCT扫描,记录视杯深度、OCT图像下垂直C/D值、平均RNFL厚度,同时记录年龄、眼压、屈光度及眼底平面彩图C/D值,1年后行重复测量,对相关数据进行比较分析。结果:1OCT图像下垂直C/D与平均RNFL厚度两次检查结果均存在统计学差异(P<0.05)。2年龄、屈光度与平均RNFL厚度呈负相关。3眼压与OCT图像C/D值呈正相关。4眼底平面彩图C/D值与OCT图像下垂直C/D值测量值存在高度相关性,C/D值与平均RNFL厚度呈负相关,与视杯深度呈正相关。结论:临床中如遇到视杯偏大的患者,特别是青少年患者,应进一步检查随诊,不应轻易诊断生理性大视杯,从而使可疑的青光眼漏诊而错过最佳治疗时间。     

频域光学相干断层扫描检测青光眼黄斑区节细胞复合体厚度的临床研究

目的:探讨黄斑区神经节细胞复合体(GCC)厚度在正常眼压性青光眼(NTG)与原发性开角型青光眼(POAG)人群中的分布特征。方法:采用频域光学相干断层扫描(SD-OCT)对NTG患者81例81眼、POAG患者125例125眼及年龄、性别、屈光度相匹配的正常对照者56例56眼黄斑区视网膜、视盘进行扫描,分析计算出黄斑区整体上方GCC厚度(GCC-Sup)、下方GCC厚度(GCC-Inf)、平均GCC厚度(GCC-Avg)、视盘旁上方视网膜神经纤维层厚度(RNFL-Sup)、下方RNFL厚度(RNFL-Inf)及平均RNFL厚度(RNFL-Avg),Zeiss Humphrey 750型视野计检测各组中心30°视野平均缺损(MD)值,比较3组患者GCC、RNFL及MD参数的差异,并分析GCC厚度值、RNFL厚度值与MD值的相关性。结果:POAG组及NTG组的GCC-Avg、GCC-Sup、GCC-Inf、RNFL-Avg、RNFL-Sup、RNFL-Inf值及视野MD值均低于正常对照组,差异有统计学意义(P<0.05)。所有研究对象GCC-Sup、GCC-Inf、GCC-Avg值与对应区域RNFL厚度值均呈显著正相关(r=0.675、0.669、0.698,P<0.01)。RNFL-Avg值与视野MD值呈显著正相关(r=0.741,P<0.01),GCC-Avg与视野MD值亦呈显著正相关(r=0.613,P<0.01)。结论:频域OCT能定量检测黄斑区GCC厚度,并与RNFL和视野损害有较好的相关性,可为青光眼的诊治提供重要依据。     

青光眼盘沿面积、杯盘比及视网膜神经纤维层缺损的分析

作者对17例26只眼原发性开角型青光眼(POAG)、疑似青光眼24例54只眼和正常对照21例42只眼的盘沿面积(NRA)、杯盘比(C/D)和视网膜神经纤维层缺损(RNFLD)变化进行了比较,以探讨各指标的特点和相互关系,以求有益于POAG的早期诊断。本文结果显示:在正常对照组中,NRA不受视盘大     

FD-OCT测量视盘周围视网膜神经纤维层和视神经乳头参数在青光眼早期诊断中的意义

目的:探讨RTVue傅里叶域光学相干断层扫描成像仪(fourier-domain optical coherence tomography, FD-OCT)测量视盘周围视网膜神经纤维层(retinal nerve fiber layer, RNFL)及视神经乳头(optic nerve head,ONH)各项参数在青光眼早期诊断中的作用?方法:应用RTVue FD-OCT测量青光眼患者50例76只眼及正常人45例80只眼的视盘周围RNFL厚度及ONH各项参数,比较正常眼与各期青光眼的差异,用受试者工作特征曲线下面积(area under the receive operating characteristic curve, AUROC)评价其在青光眼早期诊断中的作用?结果:不同阶段青光眼患者各象限及平均RNFL厚度均比正常人减少,差异有统计学意义(P < 0.001)?除视盘面积,其余ONH参数(视杯面积?盘沿面积?盘沿容积?视神经容积?视杯容积?杯盘比?水平杯盘比?垂直杯盘比)在正常组与青光眼组之间差异均有统计学意义(P < 0.001)?正常组与青光眼组之间平均RNFL?垂直杯盘比?杯盘比和视杯面积的AUROC最大?正常组与早期组之间平均RNFL?杯盘比?视杯面积AUROC最大?结论: RTVue FD-OCT测量视盘周围RNFL厚度及ONH参数有助于青光眼早期诊断?     

OCT在原发性开角型青光眼中的应用

目的 探讨OCT在原发性开角型青光眼中的应用价值.方法 选取30例原发性开角型青光眼患者,对其视盘血流情况进行观察,采用OCT血管成像技术来对视盘面积、盘沿面积、平均杯盘比、垂直杯盘比以及视杯容积等参数进行测量,然后采用Pearson线性分析以上指标与患者视野平均缺损程度之间的相关性.结果 经视野计检查,患者视野平均缺损程度为(-4.25±2.42)dB,经OCT检查,视盘面积为(2.50±0.43)mm2,盘沿面积为(1.42±0.44)mm2,平均杯盘比为(0.48±0.23),垂直杯盘比为(0.65±0.22),视杯容积为(0.37±0.20)mm2,视野平均缺损与盘沿面积为负相关,与盘沿面积、平均杯盘比、垂直杯盘比以及视杯容积均为正相关(P<0.05).结论 OCT在青光眼的检查中具有无创、简便等优势,可很好的观察其视盘血流情况,并通过盘沿面积、平均杯盘比、垂直杯盘比以及视杯容积等参数的定量分析,为原发性开角型青光眼的临床诊断提供参考和指导.     

RTVue OCT在正常人和青光眼视神经纤维层厚度和视盘参数测量的中重复性研究

目的: 研究RTVue 频域OCT 在正常人和青光眼中的视神经纤维层厚度和视盘参数测量中的重复性。 方法: 临床观察性研究。89名正常人和63名不同程度的青光眼患者入组,随机选择一眼连续3次测量视神经纤维层厚度和视盘参数。所有测量均由同一操作者完成。通过计算标准差、精确度、变异系数、和组内相关系数（ICC）来评价备的重复性。 结果: 神经纤维层厚度呈现双峰型。所有的视盘参数和均有良好的重复性。对于正常人,ICC介于0.98至1。对于不同程度的青光眼,则介于0.94至1。神经纤维层厚测量也显现良好的重复性,所有受检者的ICC值为0.95至1。对于不同区域的神经纤维层厚度测量,正常人ICC为0.94至0.98,轻度的青光眼患者则为0.94至1,中度0.87至1,重度0.77至0.97,其中重度青光眼的鼻侧变异最大,鼻下和鼻侧分别为0.77和0.87。 结论: RTVue OCT 在正常人和青光眼中的视神经纤维层厚度和视盘参数测量的中有良好的重复性。     

Reproducibility of RTVue retinal nerve fiber layer thickness and optic nerve head measurements in normal and glaucoma eyes

Background RTVue spectral-domain optical coherence tomography （OCT） is a new, ultra high-speed and high-resolution instrument, potentially to measure the presence of glaucoma or its progression accurately. The objective of this study was to evaluate its reproducibility of retinal nerve fiber layer （RNFL） thickness and optic nerve head （ONH） measurements in normal and glaucoma eyes. Methods This study was an observational clinical study. One eye was selected randomly from each of 89 normal individuals and 63 glaucoma patients in a range of severity. RNFL thickness and ONH were measured 3 times on the same day to determine intrasession variability. The same instrument was used by the same operator for all scans. Intrasession within-subject standard deviation （Sw）, precision （1.96xSw）, coefficient of variation （CVw, 100xSw/overall mean）, and intraclass coefficient （ICC） were calculated to evaluate reproducibility. Results RTVue OCT demonstrated double hump patterns in the RNFL profiles. High reproducibility was observed in all ONH parameters. For normal eyes, the value of ICC ranged between 0.98 and 1.00. For eyes with different extent of glaucoma, it ranged between 0.94 and 1.00. High reproducibility was also observed in RNFL thickness measurements. The values of ICC for averaged RNFL thickness ranged between 0,95 and 1.00 in all cases. For regional parameters, it ranged from 0,94 to 0.98 for normal eyes, 0.94 to 1.00 for mild glaucoma eyes, 0.87 to 1.00 for moderate glaucoma eyes, and 0.77 to 0.97 for severe glaucoma eyes. The nasal regions of severe glaucoma appeared to be most variable, as nasal lower region and inferior nasal region had the ICC values of 0.77 and 0.87. Conclusion Reproducibility of RTVue RNFL and ONH measurements was excellent in normal and glaucoma groups.     

应用光学相干断层成像术检测开角型青光眼视网膜神经纤维层厚度

目的:探讨光学相干断层成像术(OCT)检测开角型青光眼视网膜神经纤维层(RNFL)厚度与视野损害的关系,评价OCT在早期诊断青光眼中的意义。方法:正常人30例(52眼),高眼压9例(14眼)以及分成早期、进展期、晚期的原发性开角型青光眼48例(74眼)。采用Humphrey全自动视野计、Zeiss鄄HumphreyOCT分别进行视野以及视盘周围RNFL厚度检测。比较正常组、高眼压组以及青光眼组的RNFL厚度,分析青光眼组视野检测的平均缺损(MD)与RNFL厚度的关系。结果:正常组与高眼压组RNFL厚度差异无显著性(P>0.05);青光眼组较正常组、高眼压组RNFL厚度明显变薄,晚期青光眼表现为弥漫性RNFL缺损。视野检测的平均缺损与RNFL厚度呈负相关(P<0.05)。结论:OCT能够反映青光眼RNFL厚度的改变,为临床早期诊断青光眼提供更多的信息。     

傅立叶光学相干断层扫描测量黄斑区节细胞复合体和视网膜神经纤维层的可重复性研究

目的 采用傅立叶光学相干断层扫描（OCT）对正常眼压性青光眼（NTG）与原发性开角型青光眼（POAG）患者的黄斑区节细胞复合体（mGCC）和视网膜神经纤维层（RNFL）进行测量,评估其可重复性和诊断能力。方法 以NTG患者（NTG组,n=15）、POAG患者 (POAG组,n=15)和正常人（正常对照组,n=15）作为研究对象,采用傅立叶OCT测量各组RNFL厚度以及mGCC厚度及其整体丢失体积(GLV)和局部丢失体积(FLV),首先由检查者A测量,重复5次,间隔时间为4 h,检查者B于次日行相同检查。以检查者内和检查者间的类内相关系数（ICC）评估可重复性,受试者工作特征曲线下面积(AROC)分析诊断能力。结果 三组mGCC和RNFL测量的ICC均>0.75。NTG组和POAG组的各项测量参数与正常对照组比较差异均有统计学意义（P<0.05）;NTG组与POAG组RNFL厚度和FLV%比较差异无统计学意义（P>0.05）,而mGCC厚度和GLV%比较差异有统计学意义（P<0.01,P<0.001）;RNFL与mGCC参数间的AROC比较差异无统计学意义（P>0.05）。结论 对于NTG和POAG患者,傅立叶OCT测量mGCC和RNFL的可重复性好,RNFL具有良好的诊断能力,mGCC可作为良好的补充诊断依据。     

Diagnostic capability of Fourier-Domain optical coherence tomography in early primary open angle glaucoma

Background Optical coherence tomography （OCT） is a high resolution noncontact imaging modality which can quantitatively detect the optic disc and retinal structure.This study was designed to evaluate the diagnostic capability of parameters of the optic disc, retinal nerve fiber layer thickness, and ganglion cell complex （GCC） using a new technology called Fourier-domain OCT （FD-OCT） for early primary open angle glaucoma （POAG） patients.Methods Two groups of patients, early perimetric damage POAG and normal subjects were included in this observational cross-sectional study.All patients underwent FD-OCT and visual field examination in addition to full ophthalmic examinations.Receiver operating characteristic curves （ROC） were studied for all parameters.The sensitivity and specificity for distinguishing between normal and early glaucomatous eyes, the areas under the receiver operating characteristic curves （AROC） and positive, negative likelihood ratios were evaluated for all the single parameters and selected combined parameters using arbitrary cutoffs.Results Thirty-four eyes of 34 early POAG patients and 42 eyes of 42 normal subjects were analyzed.Cup/disc （C/D）vertical ratio presented the best sensitivity and positive likelihood ratio for selected specificities （95% and 85%） which were 79.4% and 88.2%, 33.4 and 7.4, respectively.Among all single parameters, the C/D vertical ratio demonstrated the highest AROC which was at 0.930.The average thickness of circumpapillary RNFL on 3.45 mm showed the highest AROC among all of the peripapillary RNFL parameters.The sensitivity at selected specificity and AROC of GCC were not as high as C/D vertical ratio and RNFL AT on 3.45 mm.When the C/D vertical ratio, RNFL AT on 3.45 mm, and rim area were combined using a logistical diagnostic model, the AROC was raised to 0.949 but not significantly different from the top single parameter, C/D vertical ratio.Conclusions The key parameters obtained by FD-OCT were able to show the significant differences of optic discs,thickness of RNFL and GCC between POAG patients and normal subjects.According to sensitivity, specificity, likelihood ratio and AROC, the top three parameters from FD-OCT for early diagnosis of POAG were C/D vertical ratio, RNFL AT on 3.45 mm, and the rim area.     

屈光度和眼轴长度对豚鼠视网膜神经纤维层厚度和视乳头形态的影响

目的 使用光学相干断层扫描（optical coherence tomography,OCT）观察豚鼠视网膜神经纤维层 (retinal nerve fiber layer，RNFL)厚度及视乳头形态，并探讨豚鼠等效球镜和眼轴长度与这些参数的相关性。方法 选用20只普通级豚鼠，进行等效球镜和眼轴长度测量，以及运用OCT观察豚鼠RNFL厚度及视乳头形态。结果 豚鼠等效球镜与RNFL平均厚度、上方RNFL厚度、颞侧RNFL厚度、下方RNFL厚度、鼻侧RNFL厚度呈正相关；而眼轴长度与RNFL平均厚度、上方RNFL厚度、颞侧RNFL厚度、下方RNFL厚度、鼻侧RNFL厚度呈负相关。等效球镜和眼轴长度与盘沿面积、视盘面积、平均杯盘比、杯容积无相关性。等效球镜和垂直杯盘比无相关性，而眼轴长度与垂直杯盘比存在正相关。结论 等效球镜和眼轴长度对豚鼠各方位RNFL厚度均有影响。在使用豚鼠作为高眼压动物模型时，需考虑其屈光状态和眼轴长度的影响。     

Optical coherence tomography in measuring retinal nerve fiber layer thickness in normal subjects and patients with open-angle glaucoma

Objectives To investigate image characteristics and thickness of the retinal nerve fiber la yer (RNFL) in normal and glaucomatous eyes using optical coherence tomography ( OCT), and analyze the relationship between RNFL thickness and visual field index. Methods Eighty-three normal persons (150 eyes) and 83 patients with primary open angle glaucoma (POAG, 149 eyes) underwent OCT examinations with 3.4 mm diameter circ le scan to calculate the RNFL thickness. Statistical analysis was used to compa re differences in RNFL thickness in quadrants and means between the normal and g laucomatous groups and the different stages of POAG. Linear correlation and reg ression analysis were used to show the correlation between RNFL thickness and vi sual field index of 115 eyes in glaucomatous patients. Reproducibility, sensiti vity and specificity of RNFL measurements using OCT were evaluated.Results RNFL thickness measured by OCT in normal subjects was thicker in superior and in ferior, less in temporal, and thinnest in nasal quadrants. The curve showed dou ble peaks. RNFL of glaucomatous patients showed local thinning or defect, diffu se thinning, or both. The mean RNFL thicknesses of the normal group in the temp oral, superior, nasal and infeior quadrants were 90.1±10.8 μm, 140.4±10. 5 μm, 85.2±14.0 μm, and 140.4±9.7 μm, respectively with a mean of 1 14.2±6.0 μm.The numbers for the glaucomatous group were respectively 56.0 ±31.0 μm, 81.0±36.3 μm, 47.1±27.5 μm, and 73.4±38.4 μm for th e four quadrants, with a mean of 64.6±28.8 μm. There was a significant dif ference in RNFL thickness between the normal and glaucomatous groups (P&lt;0. 000), and the three stages (early, developing and late) of glaucomatous groups ( P&lt;0.000). There was a close negative relationship between RNFL thickness a nd visual field index (r=-0.796, P&lt;0.0001). The sensitivity and speci ficity of RNFL thickness in POAG measured using OCT were 93.3% and 92.0%, res pectively.Conclusions OCT can quantitatively measure RNFL thickness differences between normal persons and glaucomatous patients. RNFL thickness gradually decreases while visual fie ld defect increases with the development of POAG.     

Retinal nerve fiber layer in primary open-angle glaucoma with high myopia determined by optical coherence tomography and scanning laser polarimetry

Background Fundus changes associated with high myopia (HM) may mask those associated with primary open-angle glaucoma (POAG).This study aim to determine the characteristics of RNFL thickness changes in...     

正常人OCT不同扫描直径视乳头圆周神经纤维层厚度研究

目的 采用光学相干断层扫描术(optical coherence tomography,OCT)观察正常人环绕视乳头圆周3.0 mm直径和3.46 mm直径视网膜神经纤维层(retinal nerve fiber layer,RNFL)厚度,评价两者之间的差异及其临床意义.方法 在本科行OCT检查的正常人98人112眼,采用Zeiss OCT 3000对同一检查者分别进行以视乳头为中心3.0 mm直径和3.46 mm直径的圆周环行扫描,结果用RNFL THICKNESS AVERAGE程序分析RNFL厚度.结果 正常人不同年龄组之间的RNFL厚度无显著性差异(P》0.05);2种扫描直径所测量的各象限RNFL厚度之间差异显著(P＜0.01);上、下象限之间厚度没有显著性差异(P》0.05),但与鼻、颞侧象限厚度之间具有显著性差异(P＜0.01).结论 OCT定量检测正常人RNFL厚度重复性较好,采用不同的扫描直径可提供不同的RNFL厚度值,为临床诊断提供依据.