黄斑病变的多焦视网膜电图分析

目的 测试并比较黄斑病变患者和正常人的多焦视网膜电图。了解视网膜功能。方法 用美国EDI公司的VERISscience4.2系统对6例6眼特发性黄斑裂孔（IMH），5例7眼中心性浆液性脉络膜视网膜病变（CSCR），5例8眼老年性黄斑变性（AMD，其中3例6眼干性型，2例2眼湿性型）眼，对6个环形视网膜区域反应的P1波反应密度和潜伏期进行Mann-Whitney检验。结果 所有黄斑病变患者1，2和3环的P1波反应密度下降，与正常对照组相比差异有显著性意义；潜伏期无明显异常。结论 多焦视网膜电图可对黄斑病变患者的视功能进行定量检测。     

老年性黄斑变性的多焦视网膜电图改变

目的 测试并比较正常人和老年性黄斑变性患者的多焦视网膜电图。方法 应用美国EDI公司生产的VERIS science 4.0 视诱发反应图象系统对17例20只正常眼、7例10只老年性黄斑变性(age-related macular degeneration,AMD）干性型眼,8例　8只AMD湿性型眼和11例11只特发性黄斑裂孔(idiopathic macular hole,IMH)眼进行检测。将各组老年性黄斑变性者6个环形视网膜区域的N₁、P ₁波潜伏期和平均反应密度值与正常对照组进行比较。 结果 AMD湿性型各环N₁、P ₁ 波潜伏期和AMD干性型3～6环处N₁波潜伏期明显长于正常人。AMD湿性型在1～4环处N₁波和1～6环处P ₁波平均反应密度值下降,AMD干性型在1～5环处N₁波和1～6环处P ₁波平均反应密度值下降,IMH者在1～2环处N₁、1～3环处P ₁波平均反应密度值低于正常人。 结论 多焦视网膜电图可对老年视网膜穿孔黄斑变性部位进行视功能的定量检测。(中华眼底病杂志,2000,16:224-226)     

糖尿病视网膜病变黄斑区的光学相干断层扫描及多焦视网膜电图图像特征

为了解糖尿病视网膜病变黄斑区的组织结构的改变及其相应的视网膜功能变化的关系。我们应用了光学相干断层扫描（ｏｐｔｉｃａｌ ｃｏｈｅｒｅｎｃｅ ｔｏｍｏｇｒａｐｈｙ,ＯＣＴ）及多焦视网膜电图（ｍｕｌｔｉｆｏｃａｌ ｅｌｅｃｔｒｏｒｅｔｉｎｏｇｒａｐｈｙ,ｍ－ＥＲＧ）检测了Ⅲ～Ⅳ期糖尿病视风膜病变患者３８例６０眼,结果显示ＯＣＴ图像特征大致可分五种形态,ｍ－ＥＲＧ反应密度图形可以反映出黄斑的视网膜功能并与黄斑区的组织形态的改变有较密切的关系。ＯＣＴ及ｍ－ＥＲＧ的应用为糖尿病视网膜病变患者黄斑病变的组织形态和视网膜功能的评价及随访提供可靠的检测手段。     

多焦视网膜电图在视网膜病变中的应用

目的探讨和评价多焦视网膜电图(ERG)对视网膜病变的应用价值。方法应用VERIS4.0视诱发反应图像系统检测了11例(11眼)特发性黄斑裂孔,24例(25眼)视网膜脱离和15例(30眼)视网膜色素变性的多焦ERG。测试野的水平视角为±26.6°,垂直视角为±22.1°,采用Burian-Allen接触镜电极,在8min(分16段)记录103个视网膜部位的反应。结果与正常年龄组相比较,特发性黄斑裂孔,于1～2环N     

糖尿病视网膜病变患者的多焦视网膜电图研究进展

糖尿病视网膜病变(diabetic retinopathy,DR)是糖尿病患者主要的眼部并发症,可以导致视力的严重损害.多焦视网膜电图是一项新的视觉电生理测量方法 ,能在相对较短的时间内测量整个测视野中许多细小部位的视网膜电图,可以反映局部视网膜的功能,对于DR的早期诊断具有极其重要的价值,并且能够定量地监测DR的进展情况,判断疗效和预后.     

六种黄斑部病变的多焦视网膜电图比较

目的:比较6种黄斑病变的多焦视网膜电图(mERG)差异。 方法:记录了6种类型黄斑部病变患者的mERG,并与相应年龄组正常对照进行了比较。 结果:各种类型黄斑病变mERG均较正常对照组有显著差异,mERG各环N1、P1振幅反应降低,潜伏期延长(P<0.01);mERG振幅降低以中心1环处最为严重,随离心度增加mERG振幅与正常差异有逐渐减小趋势;在6种黄斑病变中mERG 1环振幅以渗出性老年性黄斑变性(ARMD)、中心性渗出性脉络膜视网膜病变、特发性黄斑裂孔和Stargardt病mERG降低较严重,而萎缩性ARMD、特发性黄斑部视网膜前膜及特发性中心性浆液性脉络膜视网膜病变mERG变化相对较轻。 结论:mERG是一种十分有效的黄斑功能测定方法;不同类型黄斑病变的黄斑功能在总体上存在有差异。眼科学报 2003;19:257-261。     

眼底无可见视网膜病变的糖尿病患者多焦视网膜电图特征

目的 检测眼底无视网膜病变糖尿病患者的多焦视网膜电图(multifocol electmretinogram, mf-ERG),评价其在糖尿病患者早期视网膜功能改变中的作用.方法 应用mf-ERG检测30例(56只眼)正常对照组和32名(58只眼)无眼底镜下可查见的视网膜病变的糖尿病患者.对两组mf-ERG中a波和b波的潜伏期、振幅总和以及b波的振幅密度进行分析比较.结果 在糖尿病组,除0环和颞下象限之外.b波的潜伏期均明显延迟,而a波和b波振幅总和及b波的振幅密度减低主要集中在黄斑周围区域(0～1环)和颞上象限,差别有统计学意义(P<0.05).结论 mf-ERG能在DR出现之前客观定量地评定视网膜功能的变化程度和范围.     

糖尿病视网膜病变患眼的多焦视网膜电图定量分析

糖尿病视网膜病变 (ｄｉａｂｅｔｉｃｒｅｔｉｎｏｐａｔｈｙ ,ＤＲ)的全视野视网膜电图 (ｅｌｅｃｔｒｏｒｅｔｉｎｏｇｒａｍ ,ＥＲＧ)改变已有不少研究 ,但由于传统的视网膜电图仅能记录视网膜的整体反应 ,而无法分辨各局部视网膜的电位反应 ,因此在ＤＲ的研究和临床应用中均存在着局限性。近来 ,Ｓｕｔｔｅｒ等[1] 发明了一种多焦视网膜电图 (ｍｕｌｔｉｆｏ ｃａｌｅｌｅｃｔｒｏｒｅｔｉｎｏｇｒａｍ ,ＭＥＲＧ)技术 ,在相对较短的时间测量整个测试野内许多细小部位的ＥＲＧ ,其一阶反应可反映视网膜内层的功能[2 ] 。我们对 30例增生…     

黄斑病变的多焦ERG特征

目的报告几种常见黄斑病变的多焦ERG特征.方法应用VERIS4.0视诱发反应图象系统检测黄斑裂孔、老年黄斑变性(干性型和湿性型)、中心性浆液性视网膜脉络膜病变、中心性渗出性视网膜脉络膜病变和Stargardt病于视网膜后极部26.6X22.1°内103个视网膜部位的反应曲线和立体功能图.结果;依据黄斑病变的病种和程度,反应曲线显示中心凹及黄斑区的反应降低或平坦,立体图显示峰值下降或凹陷.结论多焦ERG提供对黄斑病于黄斑区和后极部视网膜功能的定量和直观评价.     

中心性浆液性脉络膜视网膜病变的多焦视网膜电图改变

黄斑区是视力敏锐和感受颜色视觉的重要部位 ,其面积较小 ,常规全视野视网膜电图对发现黄斑病变较不敏感。局部视网膜电图可提高检测的敏感性 ,但多数只能测定黄斑区 10°范围内的改变。 90年代初 Sutter研制了多焦视网膜电图(multifocal electroretinogram,m ERG) ,通过计算机用 m系列假随机方法 ,在高亮度显示器显示快速的闪烁多部位刺激 ,获得的信号由计算机处理 ,得到各个刺激部位的视网膜电图波形 ,可以发现微小病变造成的视功能变异 [1 ]。本研究应用m ERG对正常对照眼和中心性浆液性脉络膜视网膜病变 (简称中浆 )眼进行检测并比较…     

亚临床期糖尿病视网膜病变的多焦视网膜电流图

多焦视网膜电流图(multifocalelectroretinogram,mERG或mfERG)是一种新兴的眼科检查手段,通过使用特殊m-序列刺激手段短时间内提取局部ERG信号,客观、定量地反映视网膜功能。糖尿病引起的眼部并发症是糖尿病患者致盲的一个主要原因,能够在亚临床期早期诊断糖尿病视网膜疾病(diabeticretinopathy,DR),对于预防和治疗DR有着重要的意义。mERG能够客观地检测DR,应用于研究和临床,评估那些预防和治疗DR方法的效果。     

白内障超声乳化吸出术后多焦视网膜电图变化

目的:采用多焦视网膜电图(multifocalelec-troretignroam,mfERG)评价年龄相关性白内障患者行超声乳化白内障吸出术后视网膜功能的改变。方法:应用法国Metrovision公司生产的VisionMonitor视觉诱发系统检测23例23眼年龄相关性白内障超声乳化术后及8例11眼同龄正常对照眼的mfERG,检测视野的水平视角±30°,垂直视角±23°,采用ERG-jet接触镜电极,于5min记录61个视网膜部位的反应。结果:与正常对照组比较,白内障术后组mfERG的N1波潜伏期在各视网膜半区、4个象限及第2～5环延长,差异有显著性意义;P1波潜伏期在视网膜上半区、颞侧区、颞上象限、颞下象限和第2～4环延长,差异有显著性意义;N2波潜伏期在视网膜下半区、颞下象限及第2～4环明显延长,差异亦有显著性意义。术后组N2波振幅密度在视网膜颞侧区、颞上和颞下象限降低,与对照组比较差异有显著性意义。结论:白内障术后眼mfERG的一阶kernal反应有明显改变,为进一步研究白内障患者视网膜的功能提供参考。     

多焦视网膜电图对近视眼的临床研究

目的:测试近视眼患者的多焦视网膜电图的改变。方法:应用美国EDI公司生产的VERISScience4.2多焦视网膜电图检查仪对24例48眼近视患者,22例44眼正常者进行检测,分析其总体和6个环形视网膜区域的反应。结果:近视患者总体和6个环形视网膜区域的反应密度均低于正常者,潜伏期无明显改变。结论:近视患者多焦视网膜电图的反应密度下降,这种改变主要是由于视网膜感受器功能受损所致。     

正常人多焦图形视网膜电图的特征

目的　检测正常人多焦图形视网膜电图 (m PERG)特征。方法　 2 0只正常眼 ,罗兰视觉电生理仪行m PERG检查 ,重复测试 5次。记录波形成分并进行统计学处理。结果　P1、N1波 :第 1至 5环间的振幅密度值逐渐下降(P <0 0 1) ,差异无显著性 (P >0 0 5 ) ,颞侧视网膜的峰时较鼻侧延长峰时差异无显著性 (P >0 0 5 ) ,4个象限间的振幅密度值差异有极显著性 (P <0 0 1) ,上下半部视网膜的振幅密度值和峰时差异均无显著性 (P >0 0 5 )。N1波峰时 :颞上较鼻上、鼻下象限 ,颞下较鼻上、鼻下象限延长 (P <0 0 1)。结论　多焦视网膜电图能定位、定量地反映视网膜神经节细胞功能 ,为临床提供正常参考值     

Objective functional assessment of age‐related maculopathy: a special application for the multifocal electroretinogram

This paper gives a brief review of methods that assess objectively function in age‐related maculopathy (ARM) with emphasis on a newer method, the multifocal electroretinogram (mfERG). In contrast to other electrophysiological tests, such as the full‐field and focal electroretinogram (ERG) or the electro‐oculogram (EOG), which measure summed responses from various cells from larger areas of the retina, the multifocal electroretinogram maps function locally with a resolution as small as four degrees within the central 30 degrees. By using different paradigms it can measure local cone‐ and rod‐mediated functional impairment at early and late stages of ARM. This improved mapping and higher resolution of the posterior pole compared to other objective methods might lead to earlier detection of ARM. Its usefulness has been demonstrated in documenting the effects of treatment after established laser treatments, such as photodynamic therapy (PDT) and in documenting function after retinal pigment epithelial transplantation, a possible future treatment in late neovascular ARM.     

Multifocal electroretinogram in non-pathological myopic subjects: correlation with optical coherence tomography

AIM: To investigate the changes of retinal function in non-pathological myopic subjects using multifocal electroretinography (mfERG) and to correlate the data with the central macular thickness obtained using optical coherence tomography (OCT). METHODS: One hundred and thirteen subjects (113 eyes) with age range from 18 to 35y were enrolled in the study. The subjects were divided into four groups according to spherical equivalent (SE) and axial length (AL): emmetropia group (EG, n=31; SE: +0.75 to -0.50 D; AL: 22 to 24 mm), low and medium myopia group (LMMG, n=26; SE: ＞-0.50 to -6.00 D; AL: ＞24 to 26 mm), high myopia group (HMG, n=34; SE: ＞-6.00 to -10.00 D; AL: ＞26 to 28 mm) and super high myopia group (SHMG, n=22; SE: ＞-10.00 D; AL:＞28 mm). The P1 amplitude density, P1 amplitude, and P1 implicit time of the first-order kernel mfERG responses were obtained and grouped into five rings. The central subfield macular thickness (CST) was obtained using macular cube 512×218 scan of Cirrus HD-OCT. RESULTS: With the increasing of eccentricity, the first positive peak (P1) amplitude density (P=0.0000, 0.0001, 0.0021 in ring 1-3 respectively) and P1 amplitude (all P=0.0000 in ring 1-5) of each group decreased. With the increasing of myopia, P1 implicit time gradually extended (all P=0.0000 in ring 1-3). The average CST in four diagnostic groups was 241.56±12.72 μm, 244.56±12.19 μm, 254.33±11.61 μm, 261.75±11.83 μm respectively. With the increasing of myopia, CST increased (P<0.001). There was negative relationship between CST and P1 amplitude, P1 amplitude density (r=-0.402, P<0.001; r=-0.261, P=0.003). There was positive relationship between CST and P1 implicit time (r=0.34, P<0.001). CONCLUSION: With the increasing of myopia, P1 amplitude density and P1 amplitude of the first-order reaction gradually reduced. This showed potential decline in retinal function in myopia. To some extent it may reflect the functional disorder or depression of the visual cells. The exact mechanism needs further study.     

斜视性弱视伴偏中心注视眼的多焦视网膜电图表现

目的：探究斜视性弱视伴偏中心注视眼的多焦视网膜电图(mfERG)特征性变化。

方法：收集2018-01/2020-12在我院就诊的斜视性弱视伴偏中心注视患者20例作为研究组(4例为外斜视,16例为内斜视),同时收集屈光不正性弱视患者20例作为对照组。散瞳状态下检查mfERG,记录P1波的振幅密度和潜伏期。

结果：斜视组弱视眼多焦视网膜电图P1波振幅密度与対侧眼相比第一环(P=0.001),第二环(P<0.001),第三环(P=0.001),第四环(P=0.009),第五环(P=0.026)明显降低; 与对照组相比第一环(P=0.033),第二环(P=0.002),第三环(P<0.001),第四环(P=0.014)明显降低; 斜视组弱视眼潜伏期与対侧眼相比第一环(P=0.017)、第二环(P=0.001)有明显缩短,与对照组相比第二环(P=0.007)明显缩短。

结论：斜视性弱视伴偏中心注视眼的多焦视网膜电图P1波振幅密度越靠近黄斑中心凹下降越多,且与屈光不正性弱视眼相比下降更多。     

Multifocal electroretinogram in multiple evanescent white dot syndrome

Electrophysiologic findings including multifocal electroretinogram and visual evoked cortical potentials were studied in a patient with multiple evanescent white dot syndrome. A 19-year-old woman was diagnosed as having multiple evanescent white dot syndrome because of decreased visual acuity, white dots on fundus examination and hyperfluorescence of the white dots in the right eye. The amplitude of the flicker electroretinogramwas reduced, but the single-flash electroretinogram was within the normal range. The P100 latency of the pattern visual evoked cortical potentials was slightly prolonged. The amplitudes of multifocal electroretinogram were, markedly reduced in the area corresponding to the scotoma and moderately reduced in other regions of the central field in the affected eye. The results suggest that the retinal dysfunction area is wider than that detected by subjective methods or conventional electrophysiological examinations. The delayed recovery of the visual evoked cortical potential latency suggests the involvement of the optic nerve in multiple evanescent white dot syndrome.     

Multifocal electroretinogram in normal emmetropic subjects: correlation with optical coherence tomography

Aim of the Study:

To establish the normative database for multifocal electroretinogram (mfERG) parameters in a normal emmetropic population. To correlate the data so obtained with the central macular thickness obtained using the optical coherence tomography (OCT) scan.

Materials and Methods:

mfERG data were obtained from 222 eyes of 111 emmetropic subjects. The amplitude (nv/deg²) and implicit times (ms) of the first-order kernel mfERG responses (N1, P1, and N2 waves) were obtained and grouped into five rings (Ring 1: Central 2°, Ring 2: 2–5°, Ring 3: 5–10°, Ring 4: 10–15°, Ring 5: >15°). The central macular thickness (CMT) was obtained using the macular thickness scan protocol of the OCT.

Results:

The mfERG data obtained were used to create a normative database. The amplitudes of the mfERG waves were maximum in the fovea and progressively decreased with increasing eccentricity (P = 0.0001). The latencies of the P1 and N2 waves were longest in the central ring and progressively shortened with eccentricity (P = 0.0001). No statistically significant correlations were observed between central ring 1 parameters and the CMT.

Conclusion:

This study establishes normative database for mfERG parameters in an emmetropic population. No statistically significant correlation was noted between CMT and mfERG parameters.