成年食蟹猴视网膜结构和功能参数

目的测量成年食蟹猴视网膜结构和功能参数, 探讨非人灵长类动物与正常人视网膜结构和功能参数的相似度。方法对3只5岁龄成年食蟹猴的6只眼进行彩色眼底照相、视网膜光学相干断层扫描(OCT)、视网膜电图(ERG)等在体的眼科学检查, 测定猴眼视网膜黄斑中心凹区及距黄斑中心凹鼻侧、颞侧、上方、下方各1 000 μm、2 000 μm处的内外层视网膜厚度、视网膜神经纤维层(RNFL)厚度以及视盘面积、视杯面积、杯盘面积比等视盘参数和闪光ERG的生物学参数。比较不同眼别间各参数差异。参照既往已发表文献, 比较各参数与正常人的相似度。结果正常成年食蟹猴的视网膜黄斑中心凹处厚度为(252.31±4.79)μm, 视盘面积为(1.89±0.05)mm2, 杯盘面积比为0.14±0.01, RNFL平均厚度为(103.53±0.58)μm。暗适应0.01 ERG b波振幅为(66.75±7.29)μV, 暗适应3.0 ERG a、b波振幅分别为(57.15±15.01)、(122.10±25.51)μV, 暗适应10.0 ERG a、b波振幅分别为(72.98±20.14)和(131.67±13.78)μV...     

正常成年家猫不同明适应条件下闪光视网膜电图的变化

目的:探讨正常成年家猫不同明适应条件下闪光视网膜电图(flash electtoretinogram,F-ERG)最大反应的变化并建立正常值范围,为相关研究提供一种创伤较小且实用可行的实验方法和相关依据.方法:成年家猫37只,全麻状态下暗适应20min后开启背景光计时,在明适应5,15,30,60s;3,5,10,20,30min用相同强度的光刺激、采集并记录分析不同明适应时间点F-ERG的a,b波的峰潜时及振幅并描出a,b波的振幅变化曲线图.结果:在不同明适应时间成功记录到典型且重复性好的F-ERG波形.经过分析观察到在不同的明适应时间,a,b波的潜伏期均无明显差异,b波的振幅变化较为明显,明适应5min后记录到的F-ERG,b波振幅值达高峰.结论:本法为成年家猫明适应F-ERG的检测提供了一种创伤小且具有较好重复性的实验方法和实验参考依据.     

视网膜色素上皮变性大鼠随生长发育的视网膜电图改变

背景RCS—rdy-P’大鼠随着生长发育会逐渐发生视网膜色素变性（RP）,记录其生长发育过程中的视网膜电图（ERG）改变可为该模型鼠的进一步研究奠定基础。目的观察RCS—rdy-P’大鼠视网膜发育过程中的ERG变化,研究ERG随发育的变化特点。方法采用RETI-port系统、环形角膜电极和不锈钢针状电极分别记录生后21、32、37、45、60d的RCS-rdy-P’大鼠的系列暗适应ERG,每个年龄组6只鼠。取相同时间点及数量的同种系正常的RCS-rdy-P’大鼠作为正常对照。暗适应不同时间的ERG对比采用RCS-rdy＋P’生后60d大鼠共9只,每组3只。结果在刺激光强、刺激频率、体温相同的情况下,RCS-rdy-P’大鼠ERGb波振幅与暗适应时间有关,随着暗适应时间的延长,b波振幅增加,当暗适应时间超过12h时,即使暗适应时间增加,b波振幅不再增长,说明暗适应超过12h可以得到RCS-rdy＋-P’大鼠一个较为稳定的ERG波形。与RCS—rdy＋一P’大鼠比较,RCS—rdy-P’大鼠在生后21d时ERG已出现a波、b波振幅的下降,同时隐含时明显延长,以a波改变为主。随着RCS—rdy-P’大鼠年龄增长及RP的进展,ERGa波、b波振幅进一步下降,隐含时延长,RCS—rdy-P’大鼠生后60d时,其ERG反应记录不到。对照组大鼠在21d时,ERG的a波、b波均振幅较低;生后32d时RCS—rdy-P’大鼠b波振幅增加,但隐含时缩短;到生后45d仅小幅增加,45～60d再次出现b波振幅显著增加,隐含时缩短。结论RCS—rdy一一P’大鼠随着年龄的增长发生视网膜功能的变化,其暗适应ERG改变符合RP的进展过程。     

早产儿和足月产婴儿视网膜电图比较

目的了解早产儿视网膜功能发育程度。方法选取健康无眼病早产儿和足月产婴儿各25例进行闪光视网膜电图(ERG)检测，记录视杆细胞反应、视锥细胞反应及最大混合反应。对比分析两组婴儿的ERG各波反应的潜伏期、振幅以及最大反应b／a波振幅比值。结果与足月产婴儿比较，早产儿视杆细胞反应潜伏期延长（t=11.007，P=0.000），差异具有统计学意义，而振幅没有明显改变（t=1.836，P=0.069）；最大反应a、b波潜伏期延长(t=2.44，P=0.010;t=10.800，P=0.000)，而振幅降低(t=5.804，P=0.000; t=5.809，P=0.000)，差异具有统计学意义。两组婴儿视锥细胞反应除b波振幅无明显差异外（t=0.486，P=0.628），a波潜伏期（t=4.444，P=0.000）和振幅（t=3.819，P=0.000）及b波潜伏期（t=2.850，P=0.005）差异具有统计学意义。两组间最大混合反应的b／a波振幅比值没有明显差异（t=1.142，P=0.256）。结论早产儿视网膜发育程度较足月产婴儿稍低。(中华眼底病杂志,2005,21:285-287)     

暗适应时间对SD大鼠视觉电生理的影响

目的 研究暗适应时间对SD大鼠视觉电生理检查结果的影响,用于制定标准化实验记录方案,便于比较不同实验室间的结果。方法 实验研究。42只SD大鼠（42眼）随机分为7组,分别于暗适应15 min、30 min、1 h、4~6 h、12~14 h、15~17 h、24~26 h后记录视觉电生理。采用单因素方差分析比较各组间差异,post hoc检验分析两两间差异。结果 暗适应时间对大鼠视觉电生理的影响主要发生于暗适应视网膜电图a波和b波的潜伏期,表现为15 min暗适应时间组较其余各组潜伏期长（P<0.05）;30 min以上暗适应时间,各组潜伏期差异无统计学意义。结论 暗适应时间影响视网膜电图（ERG）记录,对SD大鼠暗适应ERG记录的暗适应时间不宜少于30 min。     

利用锥体细胞失功能大鼠和先天性静止性夜盲大鼠对视锥与视杆通路振荡电位的分离研究

背景 振荡电位(OPs)是评估视网膜缺血缺氧性疾病视网膜功能变化的重要工具,利用视网膜退行性病变动物模型对视锥、视杆通路起源的OPs特点进行研究非常重要. 目的 在两种自发性视网膜退行性病变模型大鼠中分离视锥、视杆通路,对比分析视杆、视锥通路起源的OPs波的特点. 方法 采用雄性SD大鼠、锥体细胞失功能(RCD)大鼠、先天性静止性夜盲(CSNB)大鼠各6只,以RETI-scan视觉生理记录系统分别在暗适应(12h)和明适应(10 min)条件下,用不同强度的刺激光(-35、-25、-15、-5、0、5 db)进行刺激,记录各组大鼠的闪光视网膜电图(FERG),通过Matlab 7.0的Butterworth滤波提取OPs,采用快速傅里叶变换(FFT)对所得OPs进行频谱分析.结果 暗适应条件下SD大鼠和RCD大鼠的ERG均可见a波和b波,但CSNB大鼠b波阙如;明适应条件下,SD大鼠和CSNB大鼠可见b波,但RCD大鼠各波阙如.暗适应较高刺激光强度下,SD大鼠和RCD大鼠均有低频(主频)和高频(次频)两个明显的频峰,分别为75 ～ 110 Hz、90～120 Hz和90～ 120 Hz、110 ～ 135 Hz;不同刺激光强度下,CSNB大鼠只有一个频峰,为70～100 Hz.而明适应不同刺激光强度下,SD大鼠和CSNB大鼠均只有一个频峰,分别为75～95 Hz和70～85 Hz.明适应条件下与SD大鼠比较,CSNB大鼠b波隐含时延长,b波振幅明显下降,差异均有统计学意义(P＜0.05);暗适应条件下,RCD大鼠b波隐含时和振幅与SD大鼠比较,差异无统计学意义(P＞0.05);与SD大鼠比较,RCD和CSNB大鼠OPs波振幅下降,隐含时延长,差异均有统计学意义(P＜0.05);明适应条件下不同刺激光强度下CSNB大鼠OPs波的隐含时明显长于SD大鼠,振幅明显低于SD大鼠,差异均有统计学意义(P＜0.05). 结论 视锥、视杆通路起源的OPs有不同特性,自发性视网膜退行性改变大鼠的视杆OPs有两个频峰,正常情况下,视杆通路对OPs的贡献比视锥通路大.     

正常人闪光视网膜电图的特征

目的:探讨闪光视网膜电图(flash electroretinogram,F-ERG)在正常人的变化规律,以获得正常参考值.方法:应用法国Metrovision公司生产的Vision Monitor视觉诱发系统检测正常人53例73眼.F-ERG的5个标准反应,包括暗适应25dB弱光刺激时的反应(来自于视杆细胞)、暗适应odB强光刺激时的反应、振荡电位、明适应白色标准闪光刺激时的反应(来自于视锥细胞)和明适应快速重复闪烁光刺激的反应.按照10岁为一年龄组分成4组:20～29岁,20眼;30～39岁,22眼;40～49岁,19眼;50～60岁,12眼.比较4个年龄组振荡电位总振幅和a波、b波的振幅及潜伏期.结果:F-ERG暗适应25dB弱光刺激时a波无明显反应,b波潜伏期为1102±113ms,振幅为226.7±492μV;暗适应odB强光刺激时a波潜伏期为263±12ms,振幅为.205.4±40.1μV,b波潜伏期为49.3±2.3ms,振幅为481.2±81.2μV;明适应白色标准闪光刺激时a波潜伏期为23.0±1.6ms,振幅为-23.4±9.1μV,b波潜伏期为38.8±1.8ms,振幅为77.4±21.2μV;明适应快速重复闪烁光刺激b波的振幅为122.1±27.51μV;震荡电位总振幅为112.6±28.2μV.随着年龄的增加,振荡电位总振幅和其余4个标准反应的b波振幅逐渐降低,a波振幅与年龄的增加无明显相关性,50～60岁年龄组a、b波的潜伏期较其他组延长,但各年龄组两两比较无显著统计学差异(P＞0.05).结论:确定了正常人F-ERG的5个标准反应的正常值,并比较了振荡电位总振幅和a,b波振幅及潜伏期与年龄的关系,振荡电位总振幅和b波振幅随着年龄的增加逐渐降低,a波振幅与年龄的增加无明显相关性,50-60岁年龄组a,b波的潜伏期较其他组延长,但各年龄组两两比较无显著统计学差异(P＞0.05).     

正常成年家猫不同暗适应时间闪光视网膜电图的变化

目的:探讨不同暗适应时间正常成年家猫闪光视网膜电图(flash electroretinogram,F-ERG)最大反应变化正常值范围.方法:选取成年家猫20只,在不同暗适应时间1/12,1/6,2/6,0.5,4/6,5/6,1,1.5,2,3,4,5,6,7,8,9,10,15,20,30,40,50min用标准刺激参数刺激,常规程序采集记录F-ERG的a,b波的峰潜时及振幅进行分析并绘出各波峰潜时及振幅在不同暗适应时间点的变化曲线.结果:不同暗适应时间点均成功记录到典型且重复性好的F-ERG波形.不同暗适应时间,a,b波潜伏期均无明显差异,b波的振幅变化较为明显,暗适应20min,振幅值达高峰.结论:成年家猫F-ERG检测实用且创伤较小.     

65—75岁老年人F—ERG观察

目的：观察65-75岁正常老年人暗适应闪光视网膜电图（F-ERG）,评价其视网膜功能。方法：对41例（69只眼）正常老年人行标准化视多膜电图（F-ERG）最大反应测定,将结果与对照组（30-40岁正常人）比较;并分别比较老年人中不同性别以及（老年性白内障）不同晶状体混浊度（按WHO白内障分级）对F-ERG影响。结果：65-75岁正常老年人F-ERG最大反应中a波振幅小于对照组（0.01＜P＜0.05),b波振幅明显小于对照组（P＜0.01);白内障眼F-ERG最大反应中a波振幅小于无白内障眼（0.01＜P＜0.05),b波振幅明显小于无白内障眼（P＜0.01);老年男性F-ERG最大反应中a波振幅组略上于女性,但差异无显著性（P＞0.1),而b波振幅明显小于女性（P＜0.01)。结论：随年龄增长,正常老年人暗适应闪光视网膜电图（F-ERG）反应减弱,视网膜功能将发生生理性减退;白内障所致晶状体混浊将进一步减弱ERG反应交影响视觉功能;F-ERG最大反应存在着性别差异。     

正常C57BL/6J小鼠明视紫外光视网膜电图特征

目的观察小鼠紫外光敏感视锥系统（UV-cone）视网膜电图（ERG）的特点。方法实验研究。成年野生型C57BL/6J小鼠10只（10眼）,随机分成实验组和对照组,每组5只。2组均明适应（背景白光的色温为7000 K,亮度为30 cd·m^-2） 10 min后行ERG检测。实验组记录UV-cone ERG,刺激所用的紫外光波长为363 nm,刺激强度分别为0.03、0.30、1.00、3.00 mW·s·m^-2。对照组记录明视系列白光ERG。2组间最大反应a波、b波振幅的比较采用独立样本t检验。结果实验组紫外光（UV）刺激强度达到0.30 mW·s·m^-2时,ERG开始出现稳定的正向b波,其振幅为（14.8±3.0）μV;随着刺激强度增大,b波上可以记录到明显的振荡电位（前3个子波振幅较大）。而对照组b波上未见明显的振荡电位。实验组ERG最大反应b波振幅明显高于对照组（t=2.615,P＜0.05）,而a波振幅2组间差异无统计学意义（t=-1.633,P＞0.05）。结论正常成年C57BL/6J小鼠明视UV-cone ERG与传统的白光ERG在波形和最大反应幅值上存在一定的差异。     

Oscillatory potentials and the b-Wave: Partial masking and interdependence in dark adaptation and diabetes in the rat

Background Diabetes inhibits dark adaptation and both processes alter the electroretinogram (ERG) in similar ways. This study aimed to investigate the relationship between oscillatory potentials (OPs) and the b-wave during dark adaptation and to determine if this relationship changes during the development of diabetes. Methods Twenty-one rats were assigned to adaptation, control and diabetic groups. Rats were dark adapted for periods between 20 minutes and 4 hours, and ERGs recorded. Diabetes was induced with streptozotocin, and ERGs measured after 3, 6, 9 and 12 weeks after injection. Results Increasing periods of dark adaptation led to a logarithmic increase in the amplitude of the b-wave and the OPs. This was accompanied by a decrease in the peak times of the OPs and b-wave. Total OP amplitude and b-wave amplitude were linearly related, allowing an empirical OP constant to be developed to describe the relationship between the two parameters. Diabetes led to a progressive decrease in the amplitude and increase in the peak time of all waves. The OP constant decreased in a linear fashion with increasing duration of diabetes. Conclusions It is argued that OP masking of the b-wave could explain previous inconsistencies in reported ERG changes in diabetes and that a slowing of dark adaptation does not account for these ERG changes. The report concludes that the OPs and b-wave amplitudes and latencies are intimately related in the normal retina and that this correlation is lost predictably during the development of diabetes.     

Neuronal adaptation in the human retina: a study of the single oscillatory response in dark adaptation and mesopic background illumination

PURPOSE: The single oscillatory response in complete dark adaptation (DA) and the effect of mesopic illumination were studied in order to investigate the behaviour of the neuronal adaptation system as reflected in the oscillatory potentials (OPs) of the electroretinogram (ERG). METHODS: The rapid oscillatory and slow components (a- and b-waves) of single ERGs were simultaneously recorded in nine healthy, young subjects in response to first flash after both DA of 45 mins and light adaptation to a steady background light (BGL) of low mesopic intensity. RESULTS: Two low-amplitude oscillatory peaks were present in the single response to the first flash recorded in DA. There was no increase in the summed amplitudes of the OPs (SOP) when recorded in the single response to the first flash in mesopic BGL. However, the morphology of the oscillatory response altered. The first OP was reduced and a third oscillatory peak appeared. CONCLUSIONS: We conclude that early, scotopically related OPs may indeed be activated in the single response to the first flash in DA (i.e. without using conditioning flashes). Secondly, on its own, adaptation to mesopic BGL does not seem to trigger enhancement of the overall oscillatory response. The altered single oscillatory response to the first flash apparent in the mesopic BGL comprises a third cone-associated OP and seems to reflect a reorganization of the retinal microcircuitry from a predominantly rod-activated system to one of mixed rod/cone neuronal activity in the inner part of the retina at the level at which individual OPs have their respective origins.     

Effect of experimental glaucoma in primates on oscillatory potentials of the slow-sequence mfERG

PURPOSE: To determine the effect of experimental glaucoma in macaque monkeys on oscillatory potentials (OPs) in the slow-sequence multifocal electroretinogram (mfERG). METHODS: Photopic slow-sequence mfERGs were recorded from anesthetized adult macaque monkeys and normal human subjects. The stimulus consisted of 103 equal-sized hexagons within 17 degrees of the fovea. The m-sequence was slowed, with 14 blank frames, approximately 200 ms, interleaved between flashes for monkeys and 7 blank frames, approximately 100 ms, for humans, to produce waveforms similar to the photopic full-field flash ERG. Recordings were made under control conditions (24 monkey eyes, 7 human) and after laser-induced experimental glaucoma in monkeys (n = 8). A Fourier fast transform [FFT] was used to determine the frequency ranges of the major OPs. OP amplitudes were quantified by using root mean square (RMS) for two-frequency bands in five horizontal and four vertical locations. Visual field defects were assessed using behavioral static perimetry. Full-field photopic flash ERGs also were recorded. RESULTS: OPs in two distinct frequency bands were discriminated in the monkey mfERG: fast OPs, with a peak frequency of 143 +/- 20 Hz, and slow OPs, with a peak at 77 +/- 8 Hz. There were similar findings in humans and with the flash ERG in monkeys. The fast OP RMS in monkey control eyes was significantly larger in temporal than nasal retina (P < 0.01) and in superior versus inferior retina (P < 0.05) as reported previously. The slow OP RMS was largest in the foveal region. Experimental glaucoma reduced fast OP RMS in all locations studied, even when visual field defects were moderate (MD = -5 to -10 dB; P < 0.05), whereas the slow OP RMS was reduced significantly primarily in the foveal region when field defects were severe (MD < -10 dB; P < 0.05). The fast OP RMS showed a moderate correlation with local visual field sensitivity and with local ganglion cell density (calculated from visual field sensitivity). For the slow OPs the correlation was much poorer. Consistent with previous studies, the photopic negative response (PhNR) amplitude was significantly reduced when the visual sensitivity was minimally affected. CONCLUSIONS: OPs in the ERG of primates fall in two frequency bands: fast OPs with a peak frequency around 143 Hz and slow OPs, with a peak frequency around 77 Hz. The fast OPs, which rely more on the integrity of retinal ganglion cells and their axons than do the slow OPs, have potential utility for monitoring the progression of glaucoma and the effects of treatment.     

正常SD大鼠视网膜电图随生长发育变化的特点

目的研究正常SD大鼠视网膜电图(ERG)随生长发育的变化特点。方法分别测量40只(40眼)SD大鼠在出生后第14、21、28、35和56d(P14、P21、P28、P35、P56)的ERC。结果正常SD大鼠Max-ERGa波、OPsO1波潜伏期在各个时间点无明显差异;Rod-ERGb波、Max-ERGb波、Cone-ERGb波、OPsO2波潜伏期和波幅值以及OPsO1波和Max-ERGa波幅值、Flick-ERG幅值在P14分别和其他时间点有差异。结论实验在一定程度上证实了正常SD大鼠ERG中各波形的起源。明确了各波形的成熟时间,P21时正常SD大鼠ERG基本发育成熟。     

Correlations Between Dark-Adapted Rod Threshold Elevations and ERG Response Deficits in Duchenne Muscular Dystrophy

PurposeThe purpose of this study was to characterize changes in the full-field flash electroretinogram (ERG) in association with psychophysical dark-adapted visual thresholds in patients with genetically characterized Duchenne muscular dystrophy (DMD) either lacking Dp427 (Up 30) or at least Dp260 in addition to Dp427 (Down 30).MethodsTwenty-one patients with DMD and 27 age-similar controls participated in this study. Dark-adapted (0.01, 3.0, and 10 cd.s/m² flashes) and light-adapted (3.0 cd.s/m² flash) ERGs were recorded following International Society for Clinical Electrophysiology of Vision (ISCEV) standard protocols. Visual detection thresholds to 625-nm (cone function) and 527-nm (rod function) light-emitting diode (LED) flashes (2 degree diameter) were measured during a dark adaptation period after a 1-minute exposure to a bleaching light (3000 cd/m²). Initially, 8 minutes of interleaved 625-nm and 527-nm thresholds were measured. After an additional 5 minutes of dark-adaptation, a second set of threshold measurements to 527-nm stimuli was performed during the subsequent 6 minutes.ResultsDark-adapted b-wave amplitude was significantly reduced to all strengths of flash and a-wave in response to the strong flash stimulus was delayed (15.6 vs. 14.7 ms, P < 0.05) in patients with Down 30 compared with controls. Dark-adapted cone thresholds did not differ among the groups (−2.0, −1.8, and −1.7 log cd/m² for Down 30, Up 30, and controls, respectively, P = 0.21). In contrast, dark-adapted rod thresholds were elevated (F_(2,36) = 8.537, P = 0.001) in patients with Down 30 (mean = −3.2 ± 1.1 log cd/m²) relative to controls (mean = −4.2 ± 0.3 log cd/m²). Dark-adapted b-wave amplitudes were correlated with dark-adapted rod sensitivity in patients with DMD (Spearman Rho = 0.943, P = 0.005). The changes were much smaller or absent in patients with intact Dp260.ConclusionsDp260 is particularly required for normal rod-system function in dark adaptation.     

白内障患者F-ERG表现及其临床意义的研究

目的：探讨晶状体混浊对闪光视网膜电流图（flash electroretinogram,F-ERG)的影响。以及白内障术前F－ERG评估视网膜功能的价值。方法：对一组白内障患者手术前后暗适应ERG、闪烁ERG检查。分析FERG的检查结果及其与术后视力、眼底情况的关系。结果：眼底正常组术前暗适应ERGb波振幅、峰时与正常对照组无显著差异，而眼底异常组与正常对照组有显著差异。术前暗适应ERGb波振幅与术后视力有关。结论：白内障手术前行FERG检查有助于视功能的评估及预测术后视力。     

The double flash ERG during adaptation to the dark.

Electroretinogram (ERG) of albino rabbits and rheusus monkeys were recorded in a dark room applying the double flash stimuli after a sufficient adaptation to light. The stimulus intervals of the flashes were varied. The per cent amplitudes of the ERGs for the first flashes (B1) and those of the second flashes (B2) were plotted against time, as was (B1-B2)/B1 (=K). 1. B1 was independent of the stimulus interval in both species, and increased with lapse of time to reach a plateau. 2. B2 was quite dependent on the stimulus interval, and the ERG dark adaptation curves of the two species were quite different. 3. The time course of (B1-B2)/B1 was specific for the two species. In the rabbit, Ks were almonst equal for three stimulus intervals during states of adaptation to complete darkness, and in the monkey, Ks were different for the three intervals under all conditions.     

再适应视网膜电图——一种客观的暗适应功能检测方法

目的探讨用电生理方法检测糖尿病视网膜病变（ＤＲ）患者的暗适应过程。方法利用标准杆体反应的记录条件检测再适应视网膜电图（Ｒｅ－ＥＲＧ）。５２例正常眼Ｒｅ－ＥＲＧ的ｂ波振幅随暗适应时间的延长呈现由无到有、由小到大并趋于稳定的过程，达到最高值的时间平均为（２７．０８±２．５８）ｍｉｎ。结果不同时期的ＤＲ眼Ｒｅ－ＥＲＧ结果显示ＤＲ患者的暗适应功能下降，下降幅度与病变的严重程度呈平行关系。未出现ＤＲ的糖尿病患者组与正常组相比其Ｒｅ－ＥＲＧ的ｂ波振幅无统计学差异结论Ｒｅ－ＥＲＧ是一种客观的暗适应功能检测方法，但不能作为ＤＲ的早期诊断手段。     

非渗出性年龄相关性黄斑变性的黄背景光蓝闪光视网膜电图的观察

目的 :采用黄色背景光蓝闪光刺激ERG(blue on yellowflash ,ERG)方法 ,探讨非渗出性年龄相关性黄斑变性(AMD)的短波长敏感视锥细胞通路、视杆细胞系统以及双谷a波的改变特征。方法 :采用AVES 80 0 0型视觉电生理检查系统 ,在Ganzfeld刺激器上设置黄色背景光 (5 70nm)和蓝色刺激光 (45 0nm) ,检查程序及参数参照ISCEV标准。对正常人 (40眼 )和非渗出性AMD(40眼 )进行观察 ,记录视杆细胞反应、最大反应和视锥细胞反应。结果 :与对照组比较 ,非渗出性AMD的双谷a波数减少 ,视杆细胞反应b波振幅降低(P <0 .0 1) ,最大反应b/a比值异常 (P <0 .0 5 )。视锥细胞反应b波振幅下降 (P <0 .0 0 1) ,长波长敏感视锥细胞 (L cone)和中波长敏感视锥细胞 (M cone)活动受到明显压抑 ,短波长敏感视锥细胞 (S cone)活动得到充分反映。结论 :黄色背景光蓝闪光刺激ERG可以对视杆细胞系统和短波长敏感视锥细胞通路进行检测 ,非渗出性AMD的短波长敏感视锥细胞通路、视杆细胞系统和b/a比值异常 ,双谷a波数减少。黄色背景光蓝闪光刺激ERG具有临床应用价值