Short-term effects of Ginkgo biloba extract on peripapillary retinal blood flow in normal tension glaucoma

Purpose

Based on the vascular theory of glaucoma pathogenesis, we wanted to evaluate the effect of Ginkgo biloba extract (GBE) on peripapillary blood flow in patients with normal tension glaucoma (NTG).

Methods

Thirty patients with NTG were randomly placed in the GBE-treated or control groups. The GBE-treated group received 80 mg GBE orally, twice a day for four weeks, and the control group received a placebo twice a day for four weeks. Complete ocular examinations including visual field, Heidelberg retina flowmeter, and systemic examinations were performed on the first study day and on the day treatment was completed.

Results

After GBE treatment, the mean blood flow, volume, and velocity increased at almost all points, and there was a statistically significant increase in blood flow at almost all points, in comparison to the placebo. Blood volume significantly increased only in the superior nasal and superior temporal neuroretinal rim areas. GBE also significantly increased blood velocity in areas of the inferior temporal neuroretinal rim and superior temporal peripapillary area.

Conclusions

GBE administration appears to have desirable effect on ocular blood flow in NTG patients.     

Peripapillary retinal blood flow in normal tension glaucoma

AIMS: To determine if normal tension glaucoma (NTG) patients differ from age matched controls in blood flow to the peripapillary retina, as measured with confocal scanning laser Doppler flowmetry (cSLDF; "Heidelberg retinal flowmetry"). METHODS: 12 NTG patients and 12 age matched controls were compared using (a) 10 x 10 pixel boxes (the instrument default sample size), taken from the nasal and temporal peripapillary retina, (b) the average from two of these boxes, and (c) every qualifying pixel within the peripapillary retina. RESULTS: Patients and controls did not differ in blood flow measured using the default sample from a single 10 x 10 pixel box, placed in either the temporal or nasal peripapillary retina, or expressed as the average from these two boxes. However, in histograms using every pixel from the peripapillary retina, NTG patients displayed significantly higher percentages of minimal flow pixels (defined as less than one arbitrary unit of flow: 30% v 19%, p < 0.01), and significantly lower flow in the 25th, 50th, and 75th percentile flow pixel (each p < 0.05) than did age matched controls. CONCLUSION: NTG is characterised by reduced blood flow in the peripapillary retina, a result suggesting that blood flow deficits accompany, and perhaps may contribute to, disease development in these patients.     

Evaluation of the peripapillary circulation in healthy and glaucoma eyes with scanning laser Doppler flowmetry

In order to study peripapillary perfusion, one randomly selected eye of 34 healthy volunteers and 40 glaucoma patients (27 suffering from primary open-angle glaucoma (POAG) 10 from normal pressure glaucoma (NPG) and three from other types of glaucoma) was studied with a Heidelberg Retina Flowmeter. Temporal flow adjacent to the disc edge was significantly higher than the nasal flow (p < 0.01). It was reduced significantly in myopia both in controls (p < 0.05) and in glaucoma patients (p < 0.001). However, there was no difference between either controls and glaucoma patients or between POAG and NPG patients. It was independent of treatment type in glaucoma. Within the temporal peripapillary area extremely high flow values (values higher than the mean + 2 SD of the corresponding individual retinal flow) seemed to represent deep peripapillary vascular rings. They were significantly more frequent in glaucoma (72%) than in healthy volunteers (44%, p < 0.05). Their frequency was 83% in myopic and 23% in non-myopic eyes in the control group (p < 0.001). However, in glaucoma patients they were common both in myopic eyes (71%) and in non-myopic ones (75%). The results suggest that capillary perfusion adjacent to the temporal edge of the disc is significantly reduced in myopia. Deep peripapillary vascular structures can be measured on images focused on the surface of the retina, especially if the retina is thinner than normal (healthy myopic eyes and glaucomatous eyes independently of the refraction). This may mask a deficient function of the retinal capillary bed.The authors have no financial interest in the Heidelberg Retina Flowmeter.     

正常眼压性青光眼的HRF评价

目的　研究正常眼压性青光眼 (normaltensionglaucoma ,NTG )患者眼底血流特点及影响因素。方法　应用海德堡共焦扫描激光多普勒视网膜血流分析仪 (heidelbergretinaflowmeter ,HRF)检测了NTG患者 ( 18例 3 6眼 )的视盘筛板及视盘旁颞侧、鼻侧视网膜血流参数。Octopus 10 1视野计检测 3 0°中心视野。空腹静脉血检测患者血液流变学参数。结果　与正常人眼底血流参数比较 ,NTG患者筛板及颞侧视盘旁视网膜血流量、血流速、红细胞移动速率 ,鼻侧视盘旁视网膜血流量均明显低于正常组 (P <0 0 1) ;NTG患者颞侧视盘旁视网膜血流速、红细胞移动速率较鼻侧明显降低(P <0 0 1)。NTG患者筛板血流量与眼压呈正相关 (P <0 0 1) ;颞侧视盘旁视网膜血流量与眼压及屈光度呈正相关 (P <0 0 5 ) ;筛板血流速、红细胞移动速率与屈光度呈正相关 (P <0 0 5 )。鼻侧视盘旁视网膜血流量、颞侧及鼻侧视盘旁视网膜血流速、红细胞移动速率与屈光度呈正相关 (P <0 0 1)。结论　NTG患者眼底血流量较正常人低 ,支持微循环障碍 (血管学说 )在NTG的发病机制中扮演重要角色。屈光度是影响NTG患者眼底血流的危险因素。     

HRT在青光眼与近视眼中的研究

青光眼是以进行性视神经损害为特征的不可逆性致盲眼病,其病理基础是视网膜神经节细胞及其纤维的进行性丧失;近视眼是开角型青光眼的易患因素,合并近视的青光眼患者其检查结果又有自身的特点,这给我们早期的准确诊断增加了难度;HRT是一种自动化的电子计算机控制的共焦激光眼底断层扫描仪。利用HRT(heidelberg retinatom ograph)可以获取视盘的三维地形图,通过对图像的分析处理,得到视盘和视网膜神经纤维层厚度的定量描述,并且可用于地形图变化的定量分析。本文就HRT在青光眼和近视眼特别是近视合并青光眼中的诊断和在视神经损害监测中的研究作一综述。     

Pseudoexfoliation and glaucoma in eyes with retinal vein occlusion

Purpose: To evaluate pseudoexfoliation (PE) and pre-existent glaucoma in eyes with branch retinal vein occlusion (BRVO) and central retinal vein occlusion (CRVO). Methods: Consecutive eyes with a diagnosis of BRVO (73 eyes of 70 patients) and CRVO (53 eyes of 49 patients) examined between July and December 1998 comprised the study eyes. Age-matched control group consisted of 384 eyes of 192 outpatients. The prevalence of PE and glaucoma were determined and appropriate statistical tests were performed. Results: PE was present in six of 73 eyes with BRVO (8.2%), 11 of 53 eyes with CRVO (20.8%) and 20 of 384 control eyes (5.2%). Two of 73 eyes with BRVO (2.7%) and 10 of 53 eyes with CRVO (18.9%) had glaucoma. Compared with the control eyes, PE was significantly more common in eyes with CRVO and coexistent glaucoma was significantly more common both in eyes with CRVO and in eyes with BRVO. Conclusion: While glaucoma seems to be a risk factor both for BRVO and CRVO, PE is a likely risk factor for CRVO.     

海德堡视网膜断层扫描仪在开角型青光眼中的应用

介绍海德堡视网膜断层扫描仪（HRT）在开角型青光眼中的应用。HRT检查提供的视乳头及神经纤维层厚度参数,是客观准确的指标,对原发性开角型青光眼的早期诊断有很大的帮助。     

Foveolar Choroidal Blood Flow in Idiopathic Macular Hole

Purpose: To measure choroidal blood flow from foveal region in the eyes with idiopathic macular hole. Methods: Thirteen patients with macular hole and 20 age-matched healthy subjects were included into the study. While group 1 consisted of 13 eyes of idiopathic stage 4 macular hole, seven fellow eyes of the same patients with stage 1a macular hole formed the group 2. The control group (group 3) comprised the randomly selected eye of 20 age-matched healthy subjects. Mean values of blood perfusion parameters that were composed of volume, flow and velocity, were recorded from foveal region of fundus using Heidelberg Retinal Flowmeter (HRF). The differences between the three groups were compared with unpaired t-test, Wilcoxon Signed Rank and Fisher’s Exact test using statistical package program. Results: The mean blood volume and velocity in the eyes with stage 4 macular hole (group 1) and in the eyes with stage 1a macular hole (group 2) were both significantly lower than the eyes in control eyes (group 3) ( p < 0.05, unpaired t-test). Although, the mean blood “flow” parameter of group 2 was significantly lower than group 3 ( p < 0.05, unpaired t-test), there was no statistical difference in the “flow” parameter between group 1 and group 3 ( p > 0.05, unpaired t-test). The comparison between group 1 and group 2 revealed no significant difference in any perfusion parameter ( p > 0.05, Wilcoxon Signed Rank Test). Conclusion: Although, it may be result of macular hole, not necessarily the cause of it, these findings suggest that the eyes with idiopathic macular hole are associated with reduced foveolar blood flow. The measurement of the foveolar blood flow from choriocapillaris may be useful for identifying the subjects who have increased risk of development of macular hole in future. The study showed the association of a decrease in foveolar choroidal blood flow in eyes with idiopathic macular hole using HRF. Authors suggested that quantitative measurement of foveolar choroidal blood flow may be helpful for identifying the subjects who have increased risk of development of idiopathic macular hole. This study was presented at XIII. Congress of European Society of Ophthalmology in Istanbul in June, 4, 2001.     

Frequency of systemic vascular diseases in patients with primary open‐angle glaucoma and exfoliation glaucoma

Purpose: Abnormal fibrils can be identified by electron microscopy in the heart, lung, liver, kidney, cerebral meninges and other tissues of patients with exfoliation syndrome (ES). However, a clinical association of ES with arterial hypertension (HT), ischaemic heart disease (IHD), cerebrovascular accidents and aneurysm of the abdominal aorta is debated. We conducted a national registry‐based survey to further assess the first two of these associations. Methods: We reviewed the records of 519 consecutive patients to whom the Social Insurance Institution of Finland had granted free medication for glaucoma according to national common criteria. The glaucoma was classified either as primary open‐angle glaucoma (POAG) or exfoliation glaucoma (EG), masked to any systemic diseases; 20 patients with other types of glaucoma were excluded from the survey. Masked to the type of glaucoma, the registry provided data on free medication similarly granted for HT, IHD and diabetes mellitus (DM), a known modifier of risk for cardiovascular disease. Data were analysed by logistic regression, modelling age, gender and DM as confounders. Results: The control group of 344 patients with POAG was comparable as regards gender with the study group of 155 patients with EG, but patients with POAG were both younger (mean 69 versus 73 years; P < 0.0001) and had DM twice as often (10% versus 5%; P = 0.05) compared to those with EG. Adjusting for age, gender and presence of DM, no difference in frequency of HT [odds ratio (OR) 0.80 for presence of EG; 95% confidence interval (CI) 0.52–1.23, P = 0.31] or IHD (OR 0.86 for presence of EG; 95% CI 0.49–1.13, P = 0.66) was detected between the two groups. Conclusion: In this population‐based registry survey, no difference in frequency of HT or IHD was noted between patients with POAG and EG who had been granted free medication for these chronic diseases according to national common criteria. The frequency of DM was lower among patients with EG, in line with several previous reports.     

From epidemiology to lysyl oxidase like one (LOXL1) polymorphisms discovery: phenotyping and genotyping exfoliation syndrome and exfoliation glaucoma in Iceland

The first Icelandic articles on exfoliation syndrome (XFS) and exfoliation glaucoma (XFG) appeared some 35 years ago in 1974. Articles since then have included epidemiology, pedigree‐based and twin‐studies as well as investigations into XFG response to medical therapy and XFS/XFG genetics. All studies found XFS/XFG to be common in Iceland and to be age‐related. The Reykjavik Eye Study (RES), a population‐based epidemiological study, was first conducted in 1996. The RES found that XFS and XFG prevalence in patients aged 50 years and older was 11% and that XFS/XFG was more common in women than in men. These results were confirmed in 5‐ and 12‐year incidence studies that also suggested that detailed characterization of the phenotype is important, including pupil dilation. In the RES, eyes with XFS were found to be clinically unilateral in about half of cases and to have higher mean intraocular pressure (IOP) than non‐XFS eyes. However, XFS was not found to be associated with central corneal thickness, corneal curvature, anterior chamber depth, lens thickness, lens opacification or optic disc morphology. About 15% of persons with XFS had XFG, and XFG eyes had higher risk of developing visual impairment and blindness than eyes with primary open‐angle glaucoma. The first genetic studies on Icelanders, conducted about 12 years ago, were linkage studies and were unsuccessful in discovering the genetics behind XFS/XFG. However, in 2007 a genome‐wide association study in Iceland using more than 300 000 markers [single nucleotide polymorphisms (SNPs)] on a relatively small number of patients did discover that lysyl oxidase like 1 (LOXL1) on chromosome 15q24 is a major gene for XFS/XFG. These results have now largely been replicated world‐wide.     

Reproducibility of pixel‐by‐pixel analysis of Heidelberg retinal flowmetry images: the Thessaloniki Eye Study

Purpose: To identify the investigator effect in the analysis results of Heidelberg retinal flowmetry (HRF) images when pixel‐by‐pixel analysis is performed. Methods: Thirty‐two of 732 HRF images were randomly selected from a population‐based study. Pixel‐by‐pixel analysis was performed by two trained masked graders in the following way: a square window of 40 × 40 pixels or two windows of 30 × 30 pixels or four windows of 20 × 20 pixels free from blood vessels at the peripapillary retina were identified. Using a 1 × 1‐pixel window, the grader performed pointwise analysis according to a specific protocol. The analysis process was performed by each observer three times (A, B, C) at 1‐week intervals. The percentage of pixels with < 1 arbitrary unit of flow (zero flow), the 10th, 25th, 50th, 75th and 90th percentiles and mean flow values were calculated. The difference between the results of analyses B?A and C?A for all HRF parameters was estimated using the Wilcoxon signed rank test. Mixed‐effect regression models were also used after controlling for grader effect and correlation within subjects. Results: There was no statistically significant difference between the results of analyses B?A and C?A or for any parameter in the mixed‐effect regression models. Intraclass correlation was 0.9665 for the percentage of zero flow pixels. Conclusions: Pixel‐by‐pixel analysis of HRF images by trained graders remains a highly reproducible method. No grader effect was found. If a precise protocol is followed, the results are independent of the exact placement of the analysis windows and the pointwise analysis of the identified and mapped retinal tissue.     

剥脱综合征性青光眼临床分析

目的:探讨剥脱综合征性青光眼(peseudo exfoliation glaucoma,PEG)的临床表现及其特点,寻求有效的治疗途径。方法:对13例17眼剥脱综合征性青光眼患者的临床资料进行分析。结果:药物控制眼压理想3眼,行小梁切除术后眼压正常但视力降至光感1眼,小梁切除术后眼压视功能良好者4眼,白内障超声乳化术后眼压下降明显7眼,白内障超声乳化摘除联合小梁切除术2眼,其中1眼术后并发睫状环阻滞性青光眼,1眼眼压虽明显下降,但视力降至光感。结论:剥脱综合征青光眼是一种房水流出阻力增加的高眼压性开角型青光眼,其临床表现较为复杂。提高对本病的认识,能够选择正确治疗方法,减少手术并发症,最大程度减少视功能的进一步损害。     

剥脱性青光眼患者视网膜神经纤维层厚度变化分析

目的：比较维吾尔族假性剥脱综合征(PEX)患者、剥脱性青光眼(PEXG)患者视网膜神经纤维层(RNFL)厚度,为早期诊断剥脱性青光眼提供理论依据。

方法：回顾性病例对照研究。选取2018-04/ 2020-06在我院就诊治疗的维吾尔族假性剥脱综合征患者70例70 眼,剥脱性青光眼患者 80例80 眼,按照视野缺损分期分为早中期剥脱性青光眼患者56眼、晚期剥脱性青光眼患者24眼,选取同期本院收治的维吾尔族年龄相关性白内障病例60例60 眼作为对照组。比较四组患者视盘不同位置RNFL厚度。

结果：对照组、假性剥脱综合征组及剥脱性青光眼组患者视野缺损(MD)逐渐加重且剥脱性青光眼组患者MD显著高于假性剥脱综合征组(P<0.01); 假性剥脱综合征组、早中期剥脱性青光眼组及晚期剥脱性青光眼组视盘不同位置RNFL厚度较对照组均变薄(均P<0.01); 假性剥脱综合征组患者视盘平均RNFL、下方、上方RNFL厚度均低于对照组(均P<0.01)); 晚期剥脱性青光眼组患者视盘各个位置RNFL厚度明显低于早中期剥脱性青光眼患者(均P<0.01)。

结论：维吾尔族假性剥脱综合征患者早期RNFL厚度较未患有剥脱综合征人群开始变薄,早期对于假性剥脱综合征患者RNFL进行检测有助于剥脱性青光眼疾病诊断并进行治疗。     

原发性开角型青光眼患者GDx Ecc、HRTⅡ测量参数间相关性的研究

目的 观察原发性开角型青光眼患者(POAG)GDx Ecc与HRTⅡ测量参数间的关系,并与单纯GDx Ecc检查异常者进行比较,探讨联合HRT Ⅱ提高GDx Ecc检查准确性的可能性.设计 病例对照研究.研究对象 原发性开角型青光眼患者32例(49眼),15例其他检查正常仅GDx Ecc检查异常者.方法 对所有患者进行视野、眼压、眼底立体照相、GDx Ecc与HRT Ⅱ检查.采用线性回归对GDx Ecc与HRTⅡ的参量参数进行分析.采用配对x2检验对GDx Ecc、HRTⅡ出现异常的部位是否存在对应关系进行分析.主要指标 GDx Ecc测量的视网膜神经纤维层(RNFL)厚度与HRT测量的视盘形态参数.结果 (1)HRTⅡ与GDx Ecc的测量参数间在POAG患者中存在相关性,以盘沿面积与神经纤维指数(NFI)值相关性最高(r=-0.68,P=0.000).两者在上方及下方象限也存在相关性,下方象限的相关性强于上方象限,颞侧与鼻侧象限的相关性偏低.两者出现异常的部位在空间上也存在对应关系(P=0.38).(2)单纯GDx Ecc检查异常者HRTⅡ与GDx Ecc参数问也存在相关桂,以盘沿面积与NFI值相关性最高(r=-0.79,P=0.001).但与POAG患者不同,两者出现异常的部位在空问上不存在对应关系(P=0.000).结论 POAG患者GDx Ecc与HRT Ⅱ出现异常的部位在空间上存在对应关系,而这种关系在单纯GDx Ecc检查异常者中并不存在,利用这种关系联合HRT Ⅱ进行诊断可提高GDx Ecc检查的准确性.     

Blood flow of the optic nerve head and peripapillary retina in exfoliation syndrome with unilateral glaucoma or ocular hypertension

BACKGROUND: The purpose was to study whether any differences exist in the optic nerve head (ONH) and peripapillary retinal blood flow between the two eyes of patients with unilateral exfoliation glaucoma or ocular hypertension (OHT) with exfoliation syndrome. METHODS: This cross-sectional study included 50 patients. All had exfoliation syndrome with glaucoma or OHT in one eye, and these eyes comprised the study group. The fellow eyes, all normotensive, comprised the control group. Blood flow was measured with scanning laser Doppler flowmetry in the lamina cribrosa region, in the rim area, and on the peripapillary retina. Multiple linear regression analyses were used to identify any associations between different factors and differences in flow. RESULTS: Flow in the rim area was significantly higher in the study eyes than in the control eyes, with a mean difference of 172 arbitrary units (P = 0.001). The difference of 40 units in the laminar area was of borderline significance (P = 0.065) and no significant difference was found in the peripapillary retina (P = 0.530). In the study eyes, blood flow of the ONH lamina and rim area decreased with increasing glaucomatous damage, and treatment with topical timolol was associated with reduced blood flow in the lamina cribrosa and rim area. Perfusion pressure was associated only with flow in the peripapillary area (P = 0.021). CONCLUSIONS: Advanced glaucomatous damage was associated with reduced flow both in the lamina cribrosa and the rim area but not in the peripapillary retina. Treatment with topical timolol was associated with decreased flow in the ONH.     

Impaired ocular blood flow regulation in patients with open-angle glaucoma and diabetes

Background: To elucidate the potential impact of diabetes mellitus on primary open‐angle glaucoma pathology through vascular deficiency. Design: Cross‐section analysis from a longitudinal, prospective study. Participants: Eighty‐four open‐angle glaucoma patients (20 diabetic open‐angle glaucoma patients and 64 non‐diabetic open‐angle glaucoma patients) Methods: Patients were analyzed for ocular structure, ocular perfusion pressure (OPP), retrobulbar blood flow and retinal capillary perfusion. Statistical analysis was performed by SPSS version 18.0. Comparisons between groups were made as well as multivariate linear regression analysis. Main Outcome Measure: Retrobulbar blood flow and the retinal microcirculation. Results: Central retinal artery peak systolic velocity was 13.5% lower in diabetic patients (P = 0.007). In diabetic open‐angle glaucoma patients, ocular perfusion pressure positively correlated with central retinal artery and temporal posterior ciliary artery peak systolic velocity (R = 0.476, P = 0.039 and R = 0.529, P = 0.02, respectively), and with central retinal artery and nasal posterior ciliary artery resistance index (R = 0.537, P = 0.018 and R = 0.566, P = 0.012 respectively). Average retinal nerve fibre layer positively correlated with central retinal artery peak systolic velocity and temporal posterior ciliary artery end diastolic velocity (R = 0.501, P = 0.029 and R = 0.553, P = 0.019, respectively), and negatively correlated with superior and inferior retinal avascular space in the diabetic group (R = ?0.498, P = 0.030 and R = ?0.700, P = 0.001, respectively); no correlations were found in the non‐diabetic group. Negative correlations between retrobulbar and retinal circulations were only found in the diabetic open‐angle glaucoma patients, whereas positive correlations between retinal flow and non‐flow were only found in non‐diabetic open‐angle glaucoma patients. Conclusion: Diabetes may interfere with normal vascular regulation and contribute to glaucoma progression.     

Evaluation of the nerve fiber layer and peripapillary atrophy in ocular hypertension

A study has been performed with the Canon retinographic equipment on 549 eyes belonging to 3 different groups: normal population, ocular hypertension and glaucoma. The study included the evaluation of the optic disk with special attention to the presence of choroidal peripapillary atrophy, and the distribution and defects in the RNFL.A highly significant association was observed between the presence of peripapillary atrophy and the presence of defects in the RNFL, as well as between the intensity of choroidal atrophy and defects in the RNFL.This association was statistically significant in the population of ocular hypertensives (P=0,0360) but not in the population of eyes considered normal.     

Heidelberg retina tomograph parameters of the optic disc in eyes with progressive retinal nerve fibre layer defects

Purpose: To determine the Heidelberg retina tomograph (HRT) parameters that identify glaucomatous changes in optic nerve head (ONH) topography associated with progression of retinal nerve fibre layer (RNFL) defects. Methods: A total of 68 eyes with open‐angle glaucoma were included in this retrospective study: 34 eyes showed progression of an RNFL defect during the follow‐up period and 34 eyes did not. Successful RNFL photographs and scanning laser tomography examinations with the HRT were taken in all patients at each of three visits. The change in HRT parameter values during follow‐up was calculated. Results: Progression of the RNFL defect was statistically significantly correlated (p = 0.049) with only one topographic ONH parameter, the cup shape measure. The best combination of two parameters (p = 0.009) included the maximum cup depth and the linear cup : disc area ratio; the best combination of three parameters (p = 0.007) included the maximum cup depth, the linear cup : disc area ratio and the horizontal cup : disc area ratio. Sensitivity and specificity values were 52.9% and 73.5%, respectively, for the cup shape measure, 70.6% and 73.5%, respectively, for the two‐parameter combination, and 76.5% and 79.4%, respectively, for the three‐parameter combination. The areas under the receiver operating characteristic curve were 0.617, 0.724 and 0.753, respectively. Conclusions: The results indicate that the HRT parameters may be used to detect small ONH changes associated with progression of the RNFL defect. With the exception of the cup shape measure, the parameters which provide the best correlation with progression differ from those considered optimal for recognizing the presence or absence of glaucoma.     

慢性闭角型青光眼的HRT-Ⅱ研究

目的使用HRT-Ⅱ检测正常人和慢性闭角型青光眼(CACG)患者的视盘结构参数,并判断Moorfields回归分析 (MRA)和线性判别函数(LDF)对CACG诊断的敏感性和特异性。设计前瞻性对照研究。研究对象 51例(77眼)CACG患者及年龄和屈光度数相匹配的正常人32例(64眼)。方法对CACG患者及正常人进行静态视野和HRT-Ⅱ检测。CACG组被研究眼根据视野平均缺损值(MD)及视野异常评判标准分为无视野缺损组(MD≤2dB或视野评判标准阴性)和视野缺损组(MD>2dB及视野评判标准阳性)。比较正常组、无视野缺损组和视野缺损组三组间及任意两组间各视盘参数的差异。采用MRA和LDF诊断 CACG的敏感性和特异性。主要指标 HRT-Ⅱ视盘结构参数,MD,视野评判标准,诊断敏感性和特异性。结果正常人组和CACG 组间除视盘面积无明显差异外,其余各参数两组间差异均有显著统计学意义(P<0．05)。除视盘面积和轮廓线高度变化值三组间无明显差异外,其余各参数三组间差异均有极显著性意义(P<0．01)。正常组和视野缺损组除视盘面积外,无视野缺损组和视野缺损组除视盘面积和轮廓线高度变化值外,其余各视盘参数两组间均有显著性差异(P<0．05)。正常组和无视野缺损组视盘参数比较,仪盘沿容积和视网膜神经纤维层横截面积两个参数有显著性差异(P<0．05)。对已出现视野缺损的CACG诊断的敏感性和特异性,MRA分别为74．42％及95．31％;LDF则分别为69．77％和92．19％。对临床上诊断的CACG,MRA的敏感性和特异性准确性分别为55．84％和95．30％;LDF则分别为49．35％和92．19％。结论 HRT-Ⅱ对CACG和正常人的视盘检测显示两者视盘的结构具有明显的差异;盘沿容积和视网膜神经纤维层横截面积在正常人和早期CACG存在显著差异;HRT-Ⅱ对已出现视野损害的 CACG诊断的准确性较好,但对早期CACG的诊断仍不明确;HRT-Ⅱ诊断系统中,MRA对CACG诊断的敏感性和准确性较好。