不同年龄正常人多焦视网膜电流图的波形特征

目的了解不同年龄正常国人多焦视网膜电流图(mERG)的波形特征,为mERG的临床应用提供参考.方法正常志愿者35人50眼按年龄分为"＜20岁组"、"20～50岁组"、"＞50岁组"共三组,应用VERIS Science4.0视觉诱发反应图象系统进行检查.结果各年龄组正常眼mERGa、b、c波振幅在黄斑部最大,变异也最大,远离黄斑部各区逐渐减小;鼻侧a、b、c波振幅均比颞侧大,而上方与下方差别无显著性;年龄不同,正常眼mERG a、b、c波振幅和潜伏期均存在一定差异.结论mERG能在特定时间段内客观地对被检测部位每一局部区域视网膜功能进行分析,临床应用须考虑年龄因素的影响.     

多焦视网膜电流图用于近视眼视网膜功能的研究

目的应用多焦视网膜电流图(mltifocal electroretinogram,mERG)探讨不同程度近视眼不同部位视网膜的功能状态,并与正常人作比较,评价其差异。方法收集我院眼科门诊就诊的18～32岁的病例68例(101眼),分为中低度近视组(23例40眼)、高度近视组(24例40眼)和正常对照组(21例21眼)。所有病例均应用德国罗兰公司的mERG仪记录各环N1波、P1波的潜伏期和振幅密度,再比较3组各检查结果之间的差别。结果 3组N1波和P1波的振幅密度在第1环最大,随离心度的增加而逐渐降低;潜伏期在第1环最小,随离心度增加而逐渐延长。经统计学处理,高度近视组N1波和P1波各环的振幅密度较正常对照组及中低度近视组低,差异均有统计学意义(均为P<0.05);中低度近视组与正常对照组N1波和P1波各环的振幅密度比较,差异均无统计学意义(均为P>0.05)。高度近视组N1波P1波第1环潜伏期较正常对照组及中低度近视组延长,差异有统计学意义(P<0.05),其余组间比较差异均无统计学意义(P>0.05)。结论高度近视眼mERG各环振幅密度较正常眼下降,1环潜伏期较正常眼延长;中低度近视眼与正常眼振幅密度及潜伏期无明显变化。     

正常多焦视网膜电流图及其在黄斑疾病诊断中的应用

全视野视网膜电流图测量总和反应 ,难以从反应波形中确定病变部位 ,且对微小病灶也不敏感 ;局部视网膜电流图可记录局部视网膜电反应 ,但由于反应振幅小 ,干扰因素多 ,需对反应振幅进行平均处理 ,如对多个区域进行检测 ,必须在各个部位进行刺激、累加 ,花费时间长 ;由 Sutter和Tran[1 ] 研制的多焦视网膜电流图 (multifocalelectroretinogram,简称 MERG)是一项评估视网膜功能状态的新技术 ,它具有多点同时刺激 ,测量时间短 ,并可用一立体图像 (地形图 )直观显示等优点 ,它克服了全视野视网膜电流图及局部视网膜电流图的不足 ,能够对视网…     

近视眼的多焦视网膜电流图改变

目的：了解近视眼视网膜功能的早期改变,方法：83人126眼,矫正视力1．0以上,色觉正常并排除其他眼部疾患,按屈光度不同分为：“正视及低度近视组”30人30眼,“中度近视组”25人40眼,“高度近视组”28人56眼,各组年龄及性别分配,应用VERIS Science 4.0视觉诱发反应图像系统进行检查,分析比较以黄斑为中心6个区及4个象限的波形特征,结果：所有被检眼多焦视网膜电流图（mERG)a,b,c波振幅在黄斑部最大,远离黄斑部各区逐渐减小,随近视屈光度的增加,以内斑为中心6个区b,c波振幅,2－6区的a波振幅及4个象限a,b,c波振幅均逐渐减少（P＜0.05),而潜伏期比较判别没有显著性（P＞0．05）,结论：多焦视网膜电流图能客观地对被检测部位每一局部区域视网膜功能进行分析,我们的结果表明：矫正视力正常,眼底除豹纹状改变以外无其他病理变化的中,高度视眼有明显的视网膜锥细胞功能的下降。     

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。     

多焦视网膜电流图对开角型青光眼正常半侧视野的检测分析

目的　了解多焦视网膜电流图( multifocal electroretinography,mERG)在原发性开角型青光眼早期诊断中的意义。方法　正常人28 例31 眼、Humphrey视野计检测仅表现半侧视野异常的原发性开角型青光眼26 例26 眼。分别行光学相干断层成像术、mERG检测。比较正常组、青光眼组不同视野侧视网膜神经纤维层厚度以及mERG二阶反应的潜时、反应振幅密度,分析正常组、青光眼组视野检测的平均敏感度与二阶反应潜时、反应振幅密度的关系。结果　正常组、青光眼组不同视野侧视网膜神经纤维层厚度(F=116.2,P=0.000)、二阶反应的潜时(F=104.3,P=0.000)、反应振幅密度的差异有显著性(F=76.4,P=0.000)。视野检测的平均敏感度与二阶反应的潜时有显著相关性(P<0.001),与反应振幅密度无显著相关(P>0.05)。结论　mERG能够反映青光眼视神经损害,其确切机制仍需进一步探讨。     

运用多焦视网膜电流图评价羟氯喹对黄斑中心视功能的影响

目的:运用多焦视网膜电流图(MFERG)评估服用羟氯喹后视网膜黄斑中心视锥系统功能变化情况。方法:回顾性研究。将2017-01/2019-11于解放军总医院第一医学中心眼科进行检查的类风湿性关节炎患者132例264眼纳入分析。根据服药时间分为6组:A组38例76眼未服药,B组38例76眼服药1a,C组17例34眼服药2a,D组18例36眼服药3a,E组13例26眼服药5a,F组8例16眼服药5a以上停药3a。比较各组患者最佳矫正视力(BCVA)、MFERG中央第一环视网膜反应区P 1波振幅密度值的变化情况。结果:A~F组患者BCVA(0.11±0.11、0.11±0.10、0.13±0.10、0.15±0.10、0.15±0.11、0.14±0.10LogMAR)无明显差异(F=1.287,P=0.270),但A组患者P 1波振幅密度值(122.68±1.87nV/deg 2)明显高于其他组(115.76±1.71、113.38±1.51、109.10±2.52、94.61±0.78、94.02±0.91nV/deg 2,均P<0.05)。结论:长期服用羟氯喹后,即使中心视力未发生改变,MFERG检查结果显示视网膜黄斑中心视锥系统随着服药时间延长,其功能呈下降趋势,且停药后视功能不能恢复。     

高度近视患者多焦视网膜电流图的评估

目的:探讨高度近视眼患者多焦视网膜电流图在视网膜的分布特征,以了解高度近视眼患者视网膜功能的早期改变。方法:应用法国Metrovision公司生产的VisionMonitor视觉诱发系统检测66例高度近视眼患者,将高度近视分3组:高度近视组:-6.00D～-10.00D,超高度近视组:-10.00～-15.00D,极高度近视组:>-15.00D。结果:N1波振幅密度下降1环在3组间差异有显著性。2至5环P1波和N2波振幅密度下降在3组间差异均有显著性;1环仅在高度近视组与超高度近视组、极高度近视组间振幅密度下降差异有显著性,而在超高度近视组与极高度近视组间差异无显著性。mERG的N1、P1和N2波潜伏期延长在高度近视组与超高度近视组、极高度近视组间比较差异有显著性(P<0.05)。结论:高度近视眼的视网膜功能变化表现为视锥细胞和/或双极细胞功能下降。     

视网膜静脉阻塞的多焦振荡电位

目的 探讨多焦振荡电位(multifocal oscillatory potentials, MOPs)在视网膜静脉阻塞中的临床应用价值。 方法 应用VERIS 4.0视诱发反应图像系统检测视网膜静脉阻塞患者19例19只眼，其中视网膜中央静脉阻塞(central retinal vein occlusion, CRVO)8例8只眼，视网膜分支静脉阻塞(branch retinal vein occlusion, BRVO)11例11只眼。20例正常人作为本组患者的正常对照组。放大器通频带的低频截止为100 Hz，高频截止为1 000 Hz。检测试野的水平视角为±26.6°，垂直视角为±22.1°，于4 min(分8段)记录103个六边形的视网膜反应。 结果 无论在整个测试区或分成五个环，正常眼的一阶反应于37 ms内，二阶反应的第一部分于47 ms内可见三个振荡电位OP-1，OP-2，OP-3，二阶反应振荡波形较一阶反应更明确。视网膜中央静脉阻塞和视网膜分支静脉阻塞患者有91.6%(66/72)的OP-1，OP-2和OP-3潜伏期较正常的延迟，68.1%(49/72) 的OP-1，OP-2和OP振幅较正常的降低，视网膜中央静脉阻塞较视网膜分支静脉阻塞的改变更明显。 结论 MOPs能有效和定量评价视网膜静脉阻塞患者不同区域的视网膜功能。 （中华眼底病杂志，2002，18：20-22）     

多焦视网膜电图用于年龄相关性黄斑变性视网膜功能的研究

目的应用多焦视网膜电流图(MERG)探讨年龄相关性黄斑变性视网膜不同部位的功能改变。方法选用年龄相关性黄斑变性(ARMD)的患者共27例54眼,其中干性ARMD11眼、湿性ARMD21眼,正常组22眼。所有患者均对其双眼进行检查。应用Veris视网膜功能分析仪对后极部视网膜的局部反应振幅和潜伏期进行检测,分别记录刺激总体、四个象限和6个环的潜伏期及反应振幅值,应用SPSS统计软件中两个独立样本的t检验进行统计学分析。结果在干性ARMD组与正常组、湿性ARMD与正常组及干性ARMD组与湿性ARMD组之间分别对1环(0.0°),2环(2.7°),3环(5.5°),4环(9.0°),5环(13.1°)和6环(18.7°)的反应振幅及潜伏期值进行统计学分析,发现:1、干性ARMD组与正常组MERG的6个环的反应振幅的比较:P值均大于0.05均无显著性差异;6个环的潜伏期的比较:P值均大于0.05均无显著性差异。2、湿性ARMD与正常组间MERG的6个环的反应振幅比较:P值均小于0.01均有非常显著性差异;6个环的潜伏期的比较:1环、5环、6环无显著性差异(P>0.05)、2环、3环、4环有显著性差异(P<0.05)。3、干性ARMD组与湿性ARMD组间MERG的6个环的反应振幅的比较:1环、3环、4环有非常显著性差异(P<0.01)、2环、5环、6环有显著性差异(P<0.05);6个环的潜伏期的比较:1环无显著性差异(P>0.05)、2环、5环、6环有显著性差异(P<0.05)、3环、4环有非常显著性差异(P<0.01)。结论研究证实,MERG能够对视网膜功能进行评价,对视网膜黄斑区功能异常进行初步定位[1],其作为一种无损伤的检查手段,在ARMD的早期诊断、随访观察及视网膜功能评价中具有一定的意义。     

Impact of Structural Changes on Multifocal Electroretinography in Patients With Use of Hydroxychloroquine

PurposeTo investigate the relationship between retinal structure and macular function in eyes screened for hydroxychloroquine (HCQ) toxicity.MethodsParticipants referred for hydroxychloroquine retinopathy screening with spectral domain optical coherence tomography (SD-OCT) and multifocal electroretinogram (mfERG) testing were included in the analysis. Amplitude and implicit time of mfERG N1 and P1 responses were included in the analysis. Ring ratios were computed for amplitude values as the ratio of rings 1–3:5 (R1–3:R5). A control group of healthy participants was included for comparison of SD-OCT metrics.ResultsSixty-three eyes screened for HCQ retinopathy and 30 control eyes were analyzed. The outer nuclear layer (ONL) was significantly thinner in HCQ patients in the foveal (P = 0.008), parafoveal (P < 0.0001), and perifoveal (P < 0.0001) regions. The HCQ cohort was further divided into two subgroups according to the presence of structural clinically detectable retinopathy (i.e., structural damage as detected by multimodal imaging). HCQ eyes without retinopathy had a thinner ONL thickness in the foveal (P = 0.032), parafoveal (P < 0.0001), and perifoveal (P < 0.0001) regions and a thinner inner nuclear layer (INL) in the parafoveal region (P = 0.045 versus controls). Structural changes in HCQ patients without retinopathy were significantly associated with macular function as R2:R5 ring ratio of mfERG P1 amplitude was associated with INL (P = 0.002) and ONL (P = 0.044) thicknesses, and R3:R5 ring ratio of P1 amplitude was associated with ONL thickness (P = 0.004).ConclusionsOur results suggest that structural alterations secondary to HCQ toxicity may occur in the absence of clinically detectable retinopathy, and this may reflect in an impaired macular function.     

Visual Field and Multifocal Electroretinography and their Correlations in Patients on Hydroxychloroquine Therapy

Purpose To evaluate the effects of hydroxychloroquine on visual field and multifocal electroretinography (mfERG) and their correlations in patients taking hydroxychloroquine.Methods This was a cross-sectional study in which patients on hydroxychloroquine therapy underwent automated 10-2 threshold static visual field examination and mfERG recordings. Non-parametric unadjusted and age-adjusted Spearman correlation coefficients ρ were calculated between the cumulative dose of hydroxychloroquine and the visual field mean deviation (MD) and pattern standard deviation (PSD) values; and the mfERG response amplitudes and peak latencies. Correlation analysis was also performed between the visual field MD and PSD values and the mfERG response amplitudes and peak latencies.Results A total of 26 eyes in 13 patients were analyzed. The mean duration of hydroxychloroquine therapy was 4.9 years and the mean cumulative dose was 574 g. No significant correlation was found between the cumulative dose of hydroxychloroquine and the visual field MD and PSD values. There were significant correlations between the cumulative dose of hydroxychloroquine and mfERG N1 and P1 response amplitudes for the central rings (ring 1–3). The correlations between the dose of hydroxychloroquine and mfERG N1 and P1 response amplitudes were strongest for the paracentral ring 2 (ρ =−0.63 and ρ =−0.62, respectively, P = 0.001). Significant correlations were also found between the visual field MD values and mfERG response amplitudes of various ring eccentricities.Conclusions In patients on hydroxychloroquine, mfERG response amplitude correlated with both the 10-2 visual field MD values and with the cumulative dose of hydroxychloroquine used. The use of mfERG can provide objective measurement of retinal function in patients on hydroxychloroquine and may provide supplementary quantitative information to visual field findings.     

Indocyanine Green Angiographic and Multifocal Electroretinographic Features in the Diffuse and Regional Form of Bietti′s Crystalline Retinopathy

Prpose: To observe different features of indocyanine green angiography(ICGA) andtifocal electroretinography (ERG) in the diffuse and regional type of Bieti′sc stalline retinopathy (BCR). Thods: ICGA and the multifocal ERG were performed in two cases of the diffuse andregional type of BCR respectively. These data were compared with fluoresceinangiography (FA), standard Ganzfeld ERG, and visual field testing. Results: In the regional case, ICGA revealed reduced perfusion of the choroidalcirculation in the early phase and multiple hypofluorescent spots in the posterior pole in the late phase, due to choriocapillaris filling defect; the extent of choroiocapillaris losswas shown in early phase of ICGA and there were multifocal hyperfluorescent dotssurrounding hypofluorescent spots in late phase in the diffuse case. The multifocal ERGshowed that the central responses were markedly depressed, corresponding to the visualfield defects, while the findings of Ganzfeld ERG were normal in the regional BCR;however, both the multifocal ERG and Ganzfeld ERG were severely subnormal in thediffuse case.Conclusions: The features of ICGA and multifocal ERG are different between the diffuseand regional BCR. In the meantime, the two tools are also useful to differentiate the typeand assess the extentof evolution in BCR.     

双眼多焦点人工晶状体眼的远期立体视觉研究

目的比较双眼植入多焦点人工晶状体(MIOL)和单焦点人工晶状体(SIOL)植入术后远期的立体视觉,评价MIOL植入眼远期的立体视觉,进一步完善MIOL植入眼远期视功能的研究。方法观察2000年至2004年在我院接受白内障超声乳化吸除联合人工晶状体植入的患者共29例,其中双眼MIOL16例,双眼SIOL13例,术后随访时间>7m,分别检查术后非矫正近、远视力,矫正近、远视力,屈光,非矫正视力下远、近立体视锐度,矫正视力下远、近立体视锐度,问卷调查术后满意度、视觉症状。结果81.25%的MIOL眼非矫正近视力≥0.5,优于SIOL眼的15.38%(χ2=25.16,P<0.001,差异具有极显著性);非矫正远视力、矫正远视力及矫正近视力MIOL眼与SIOL眼差异无显著性(P>0.05);非矫正近视力下近立体视锐度,68.75%双眼植入MIOL者≤60s,而双眼植入SIOL者则无≤60s,两组间差异极具显著性(χ2=25.294,P<0.001);矫正近视力下近立体视锐度,93.75%的双眼植入MIOI者≤60s,相比双眼植入SIOL者的46.15%差异极具显著性(χ2=9.650,P=0.008,P<0.01);非矫正远视力下及矫正远视力下远立体视锐度,双眼植入MIOL组与双眼植入SIOL组间差异均无显著性;植入MIOL者术后满意度高于植入SIOL者(t=3.512,P=0.001,P<0.01)。结论术后远期,双眼MIOL植入者近立体视觉优于双眼SIOL植入者,植入MIOL患者满意度高于植入SIOL患者。     

多焦点人工晶状体植入术后远期疗效的观察

目的:比较以Array(AMO)为代表的多焦点人工晶状体与以AcrySof(Alcon)为代表的单焦点人工晶状体术后远期视力及对比敏感度的改变,以评价多焦点人工晶状体的有效性和安全性。方法:多焦点人工晶状体组15例30只眼,单焦点人工晶状体组15例30只眼,随访时间均为术后3个月以上;随访时均检查视力、矫正视力及最佳矫正视力下的对比敏感度。结果:多焦点人工晶状体组的矫正远视力和矫正近视力与单焦点人工晶状体组者均无明显差异(P>0.05),非矫正远视力、非矫正近视力优于单焦点人工晶状体组,两者间差异有统计学意义(P<0.05)。在昼视、昼光、暗视、暗光下,多焦点人工晶状体组3周/度(cycleperdegree,CPD)、6CPD、12CPD频率段的对比敏感度值与单焦点人工晶状体组者均无明显差异(P>0.05),在昼视状态下18CPD频率段的对比敏感度值较单焦点人工晶状体降低,差异有统计学意义(P<0.05)。结论:植入多焦点人工晶状体者术后远期较单焦点人工晶状体者能提供良好的远近视力,且对比敏感度值仅在高频率段低于单焦点人工晶状体。