正常眼压性青光眼与高眼压性青光眼视神经图像分析的对比研究

目的 探讨正常眼压性青光眼 (normal-tension glaucoma, NTG)与高眼压性青光眼(high-tension glaucoma, HTG)视盘和视神经纤维层(retinal nerve fiber layer, RNFL)损害的差异。 方法 选择具有青光眼性视神经损害或RNFL缺损、相应的视野缺损的青光眼患者,NTG至少2次24 h眼压曲线和多次眼压测量均≤21 mm Hg(1 mm Hg =0.133 kPa)，HTG的眼压至少2次测量≥25 mm Hg。患者进行详细的眼科检查，同时用扫描激光偏振仪(scanning laser polarimetry, SLP)、光学相干断层扫描（optical coherence tomography, OCT）和海德堡视网膜成像仪(Heidelberg retinal tomography, HRT)定量测定视盘形态和RNFL厚度。比较两组视盘总体和相同象限测量参数。 结果 30例 NTG和 19例 HTG (共49只眼)患者的平均年龄分别为(59.6±8.6)岁(39～71岁)和(59.2±12.3)岁(36～75岁)。两组间视野缺损的平均偏差(mean deviation, MD)差异不显著(P＞0.05)。HRT测量的视盘 C/D面积比，除鼻侧象限外,NTG者视盘总体和上、下、颞侧3个象限均显著大于HTG者(P＜0.05 ),而盘缘面积小于HTG者(P＜0.05)；两组间其他视盘参数差异不显著。3种激光扫描技术所测定的总体和象限RNFL厚度，两组间差异不显著。 结论 NTG趋向大 C/D面积比和窄盘缘面积。RNFL缺损的形态分布须更精细和节段性分析。 (中华眼底病杂志, 2002, 18: 109-112)     

正常眼压性青光眼视神经损害的临床观察

目的　探讨正常眼压性青光眼 (NPG)患者视神经损害的临床表现 ,综合性医院眼科从临床角度对NPG进行早期诊断。方法　对 2 6例NPG患者视神经损害所致眼底和视野改变的临床特点作回顾性系统分析。结果　视神经损害眼底表现为视盘盘沿形态改变和视网膜神经纤维层 (RN FL)缺损。引入盘沿宽度比概念 :以自身鼻侧盘沿宽度N为标准和下方盘沿宽度I作比较 ,N≥I为阳性指标 ,检出N≥I者 42眼 (占 80 77% ) ;对照以颞侧盘沿宽度T和下方宽度I比较 ,T≥I者 2 2眼 (占 42 3 1% )。两种方法经统计学处理 ,差异有非常显著性 (χ2 =14 5 6,P <0 0 1)。检出RNFL缺损 44眼 (占 84 62 % ) ,其中局限性缺损 3 5眼 ,弥漫性缺损 9眼。视野情况 :平均缺损MD为10 87dB± 2 41dB ,平均视野敏感度MS为 15 5 8dB± 3 0 8dB。检出不同程度视野形态缺损 3 7眼 ,阳性率为 71 15 %。结论　正常眼压性青光眼视神经损害主要表现为眼底视盘盘沿形态改变和RNFL缺损。盘沿形态改变以自身鼻侧盘沿宽度N为标准与下方盘沿宽度I相比较较合理 ,N≥I有诊断意义。视野改变为其提供重要诊断依据。     

慢性闭角型青光眼与正常眼压性青光眼视盘形态比较

目的探讨眼压依赖型与非眼压全依赖型青光眼患者视盘损害的形态异同。方法用回顾性配对设计研究。选择具有青光眼性视野缺损（MD〈10dB）的慢性闭角青光眼（CACG）和正常眼压青光眼（NTG）患者各20例20眼,年龄、视野平均偏差（mean deviation,MD）一对一相匹配。应用海德堡视网膜断层扫描仪（HRT-Ⅱ）进行定量视盘参数检查,并对检查结果进行比较。结果CACG组视盘总体和颞下、鼻下、鼻上分区的盘沿面积大于NTG组;差异有统计学意义（P〈0.05）;CACG组视盘总体和各分区（除颞侧外）视杯容积小于NTG组,两组间差异均有统计学意义（P〈0.05）;CACG组视盘总体和各分区（除颞侧及颞下外）视杯平均深度及视杯形态测量值小于NTG组,两组间差异均有统计学意义（P〈0.05）。结论CACG与NTG在疾病早中期视盘形态明显不同,提示眼压依赖型与非眼压全依赖型青光眼可能具有不同的视神经病变发生机制。     

正常眼压性青光眼临床分析

目的　探讨正常眼压性青光眼的临床特点和早期诊断。方法　我院眼科确诊或怀疑经上级医院眼科确诊的正常眼压性青光眼患者 2 2例 ,对其眼压、房角、眼底、视野、色觉等进行回顾性系统分析。结果　 2 4小时眼压曲线各时间点总体平均眼压为 (1 6 .5 1± 2 .91 ) m m Hg。房角均为宽角。眼底表现视盘盘沿形态改变 ,引入盘沿宽度比概念 ,以下方盘沿宽度 I和鼻侧盘沿宽度 N作比较 ,I/ N≤ 1者为阳性指标 ,检出 I/ N≤者 36只眼 (81 .82 % )。检出视网膜神经纤维层缺损 (RNFL D) 39只眼 (88.6 4 % ) ,其中局限性缺损 31只眼 ,弥漫性缺损 8只眼。视野情况 :平均缺损 MD为 (1 0 .2 3± 2 .37) d B,平均视野敏感度 MS为 (1 5 .82± 3.1 5 ) d B。检出不同程度视野形态缺损 32只眼 ,阳性率为 72 .73%。检出色觉障碍 8例 (36 .36 % )。结论　眼底视盘盘沿形态改变和 RNFL D为诊断正常眼压性青光眼的主要客观依据     

应用海德堡视网膜断层扫描仪检测开角型青光眼的视盘改变

目的探讨海德堡视网膜断层扫描仪(Heidelberg retinal tomography,HRT)检测青光眼性视盘改变是否与视野损害的部位相一致,了解正常眼压性青光眼(normal tension glaucoma,NTG)与原发性开角型青光眼(primary open angle glaucoma,POAG)早或中期视盘形态是否异同.方法对64例(64只眼)仅有半侧视野异常的开角型青光眼(POAG27只眼、NTG37只眼)患者进行HRT检测,将Humphery视野与HRT的检测结果以0°～180°为界,分成上下两部分进行对应分析.结果与正常半侧视野对应的1/2视盘比较,显示异常半侧视野对应的1/2视盘HRT参数中,杯盘面积比、视杯形态测量值显著增大,而盘沿面积、视网膜神经纤维层厚度及视网膜神经纤维层横断面积值显著减少 (t=-2.625～3.025,P=0.003～0.05);NTG眼和POAG眼对应与异常半侧视野的HRT视盘参数差异无显著性(t=-0.98～1.511,P=0.14～0.97).结论 HRT参数能较准确反映与视野损害相一致的视盘变化,其中尤以杯盘面积比、盘沿面积、视杯形态测量、平均视网膜神经纤维厚度及视网膜神经纤维层横断面积测量值较为准确.NTG和POAG眼的视盘形态相似,可能具备某些相似的视神经损害发生机制.     

合并近视的原发性开角型青光眼视盘形态和视网膜神经纤维层改变

目的 探讨合并近视的原发性开角型青光眼(primary open-angle glaucoma with myopia,M-POAG)视盘形态和视网膜神经纤维层(retinal nerve fiber layer,RNFL)改变的特点及其临床意义。 方法 对38例63只合并近视[(－6.92±3.79)D]、高眼压性[(32.00±9.36) mm　Hg(1 mmHg=0.133 kPa)原发性开角型青光眼(primary open-angle glaucoma,POAG)作眼底彩色照相,利用计算机图像分析设备分析视盘形态及RNFL 缺损的变化,并与单纯原发性开角型青光眼(simple primary open-angle glaucoma,S-POAG)的相应临床检查资料进行比较。 结果 M-POAG视盘形态和RNFL萎缩除具有与S-POAG相同的一般表现外,尚有其特征性改变：视盘呈椭圆形(垂直或水平)、斜入及部分缺损形,色泽苍白;视杯形态各异,呈碟形(28.6%)、垂直形(25.4%)、倾斜形(23.8%)、锅形(9.5%)及局限与同心圆形等;盘沿面积及杯/盘横径比值显著低于S-POAG组(P<0.05,P＜0.001)。视盘凹陷偏心 多向下方。RNFL局限性萎缩主要出现在下方视网膜;弥漫性RNFL萎缩与合并高度近视的中后期POAG视野缺损密切相关(P<0.005)。 结论 M-POAG的视盘形态特征以及RNFL改变特点有助于在合并高度近视的POAG中的临床诊断。(中华眼底病杂志,2000,16:81-84)     

早期开角型青光眼的视网膜神经纤维层缺损及相关临床特点

目的观察早期原发性开角型青光眼（primary open-angle glaucoma,POAG）及正常眼压性青光眼（normal tension glaucoma,NTG）的弥漫性及局限性视网膜神经纤维层缺损（retinal never fiber layer defect,RNFLD）的分布及相关的临床特点。方法通过对立体眼底像的观察,明确81例POAG及70例NTG的RNFLD类型,分析弥漫性及局限性RNFLD在两型青光眼中的分布,比较两型RNFLD患者未治疗的最高眼压及视盘出血发生比例的不同。结果81例POAG中,78例出现RNFLD,其中弥漫性RNFLD50例,局限性RNFLD28例。70例NTG中,弥漫性RNFLD27例,局限性RNFLD43例,两型青光眼的RNFLD的分布相比较,差异有显著性（χ     

海德堡激光眼底扫描仪对POAG患者视盘结构的研究分析

目的:评价海德堡激光眼底扫描仪(HRT-Ⅲ)对原发性开角型青光眼(primary open angle glaucoma,POAG)不同发展阶段的诊断能力。方法:采用海德堡激光眼底扫描仪对POAG患者65例116眼和正常人60例114眼进行视盘断层扫描获取视盘结构各参数;将正常人和POAG患者以及各期POAG患者的视盘参数进行对比分析;将POAG患者的视盘结构参数与视野平均缺损值进行相关分析。结果:POAG患者与正常人的视杯面积、盘沿面积、视杯容积、盘沿容积、杯盘面积比、盘沿视盘面积比、线性杯盘比、平均视杯深度、最大视杯深度、平均RNFL厚度的差异有统计学意义。早期、进展期、晚期POAG患者的视杯面积、盘沿面积、视杯容积、盘沿容积、杯盘面积比、盘沿视盘面积比、线性杯盘比、平均视杯深度、平均视网膜神经纤维层(retinal nerve fiber layer,RNFL)厚度的差异有统计学意义。POAG患者的视杯面积、视杯容积、杯盘面积比、线性杯盘比、平均视杯深度与视野平均缺损值呈正相关,而盘沿面积、盘沿容积、盘沿视盘面积比、平均RNFL厚度则与视野平均缺损值呈负相关。结论:HRTⅢ能够有效地反映POAG各阶段的视盘改变,与视野相关性好,为POAG的诊断提供了依据。     

傅立叶OCT和海德堡激光眼底扫描仪在开角型青光眼早期诊断中的应用

背景研究表明,视网膜神经纤维层（RNFL）缺损是青光眼早期损害的重要表现,如何准确地定量检测RNFL的厚度变化是青光眼早期诊断及监测青光眼病情进展的关键步骤之一。目的对傅立叶OCT、海德堡激光眼底扫描仪（HRT—Ⅲ）测量青光眼患者的RNFL厚度以及视盘的各项参数进行分析,对二者在青光眼早期诊断中的作用进行临床评价。方法收集可疑开角型青光眼（SOAG）患者26例40眼、原发性开角型青光眼（POAG）患者29例48眼以及正常对照组27例48眼。应用傅立叶OCT、HRT—Ⅲ、Humphrey 750-i型全自动视野计对所有研究对象分别进行视盘面积,视杯面积,杯盘面积比,盘沿面积,盘沿容积,视盘上方、下方、颞侧、鼻侧象限的RNFL厚度等参数测定和视野检查,对不同受检者测得的各项参数进行分析和比较,分别与视野平均缺损值做相关分析,评价不同参数对于青光眼RNFL损伤的诊断价值。结果傅立叶OCT和HTR—Ⅲ检测对正常对照组检查结果均证实RNFL从厚到薄依次为视盘下方、上方、颞侧、鼻侧象限,SOAG组和POAG组RNFL厚度变薄的顺序依次为视盘下方、上方、颞侧、鼻侧象限,各部位厚度改变的差异均有统计学意义（P〈0．05）,SOAG组和POAG组患者盘沿面积、杯盘面积比、视杯面积、盘沿容积与正常对照组比较,差异均有统计学意义（P〈0．05）。对3组患者的检测表明,傅立叶OCT与HTR-Ⅲ检测视盘上方象限、下方象限的测定之间存在着正相关关系（r=0．362、r=0．441、r=0．395,P〈0．05）;2种检查方法所测得3个组视杯容积、视杯面积、盘沿容积、杯盘面积比呈正相关（P〈0．05）。在POAG组中,傅立叶OCT测得视盘参数中的盘沿面积、盘沿容积、视杯容积、杯盘面积比与视野的平均缺损值间的相关系数分别为0．284、0．286、0．340、0．371（P〈0．05）;HRT-Ⅲ测得视盘参数中的盘沿面积、盘沿容积、杯盘面积比与视野的平均缺损值间的相关系数分别为0．339、0．859、0．422（P〈0．05）。结论傅立叶OCT和HRT-Ⅲ检测的视盘参数结果接近,且均与视野的平均缺损值有较好的相关性;所检测杯盘面积比、盘沿面积和视盘上方象限、下方象限的RNFL厚度的改变在青光眼早期诊断中均有重要价值。     

用Heidelberg视网膜断层扫描仪对正常眼压性青光眼与正常人视盘形态结构的对比研究

目的 比较正常人(本文所指正常人指非青光眼者)和正常眼压性青光眼(Normal Tension Glaucoma，NTG)视盘形态结构参数之间的差异，以指导正常眼压青光眼的早期诊断。方法 用Heidelberg视网膜断层扫描仪(Heidelberg Retina Tomograph Ⅱ，HRTⅡ)对正常人40例(80眼)及NTG30例(60眼)的视乳头进行断层扫描，获得视乳头平均地形图像和视乳头结构诸参数。结果 正常人与NTG视乳头结构各参数中视盘面积、视杯面积、杯盘比、盘沿面积、视杯容积、平均视杯深度、最大视杯深度、平均视神经纤维层厚度及视神经纤维层横截面积存在明显差异。结论 HRT能在活体对视乳头结构进行准确分析，视盘面积可能是青光眼的一个易感因素，对NTG早期诊断具有帮助。     

A comparison of optic disc topographic parameters in patients with primary open angle glaucoma,normal tension glaucoma,and ocular hypertension

Background Heidelberg Retina Tomograph (HRT) findings have been employed to quantitatively assess the topography of optic discs. We measured topographic parameters of optic discs in patients with primary open-angle glaucoma (POAG), normal-tension glaucoma (NTG), and ocular hypertension (OH) using an HRT in order to determine whether HRT topographic parameters can be used to differentiate those conditions.Methods Seventeen eyes in 17 patients with POAG, 23 eyes in 23 patients with NTG, and 15 eyes in 15 patients with OH were examined using an HRT, and the results were analyzed by age, refractive error, and topographic parameters.Results Among the HRT parameters, the mean values for rim area, rim volume, cup disk area ratio, and classification showed significant differences among POAG, NTG, and OH eyes. The mean values for cup area, cup volume, mean RNFL thickness, and RNFL cross section area showed significant differences between POAG and NTG eyes, and NTG and OH eyes, however, not between POAG and OH eyes. Cup shape measure showed significant differences between POAG and OH, and NTG and OH eyes, but not between POAG and NTG eyes.Conclusions Our results suggest that POAG is distinguishable from NTG and OH based on evaluations of rim area and rim volume. Patients with NTG tend to have larger cupping, smaller rims, and thinner retinal nerve fiber layers as compared to POAG and OH patients. Thus, HRT topographic parameters are useful to differentiate patients with POAG, NTG, and OH.     

Morphology of the optic papilla in glaucoma. II. Secondary chronic open angle glaucoma

Previous studies have shown that the chronic open-angle glaucomas form a heterogeneous spectrum of diseases which have in common an open anterior chamber angle and glaucomatous optic nerve damage. Purpose of this study was to evaluate whether the appearance of the optic disc shows specific features among various types of secondary chronic open-angle glaucoma. METHODS: Clinical data and color-stereo optic disc photographs of 126 patients with pseudoexfoliative glaucoma and 47 patients with pigmentary glaucoma were compared with those of 501 patients with primary open-angle glaucoma (POAG) and of 481 normal subjects. The glaucoma groups did not differ in neuroretinal rim nor in perimetric mean defect. RESULTS: Mean optic disc area was significantly smaller in the pseudoexfoliative glaucoma eyes (2.54 +/- 0.51 mm2 vs. 2.71 +/- 0.63 mm2, p = 0.03) than in the primary open-angle glaucoma eyes. The pigmentary glaucoma group did not vary significantly from the primary open-angle glaucoma group in size of the optic disc. No significant differences were found for neuroretinal rim area, configuration of neuroretinal rim, depth of optic cup and diameters of the retinal arterioles and venules at the disc border between the secondary glaucoma groups and the POAG group respectively. Size of zone beta of the parapapillary atrophy was slightly, but not significantly smaller in the secondary glaucoma groups than in POAG. In the secondary glaucoma groups, the maximal intraocular pressure measurements were significantly (p < 0.001) higher than in the group with POAG. All glaucoma groups had a significantly smaller neuroretinal rim, significantly smaller retinal arterioles, and significantly larger parapapillary atrophy compared to the normal group. CONCLUSIONS: Except of a slightly smaller optic disc in eyes with pseudoexfoliative glaucoma, eyes with secondary glaucoma due to pseudoexfoliation or due to pigmentary dispersion do not vary significantly in their optic disc morphology compared to POAG and do not show pathognomonic features of the optic disc despite marked changes in the anterior segment of the eye.     

Optic disc morphology in primary open-angle glaucoma versus primary angle-closure glaucoma in South India

Purpose:The aim of this study was to investigate the optic disc morphology in primary angle-closure glaucoma (PACG) versus primary open-angle glaucoma (POAG) in South Indians.Methods:A total of 60 patients (60 eyes) with PACG and 52 patients (52 eyes) with POAG were included in a cross-sectional observational study. The glaucoma diagnosis was based on a glaucomatous appearance of the optic disc correlating with visual field defects. The glaucoma was graded as early, moderate, or severe, depending upon perimetric loss. All patients underwent an ophthalmic evaluation, including visual field examination and planimetric analysis of 30° stereoscopic color optic disc photographs.Results:The POAG and PACG groups did not differ significantly in a disc or rim area, rim width, and frequencies of disc hemorrhages or rim notches. However, early POAG group (n = 15) had a significantly deeper cup depth (P = 0.01), larger beta zone (P = 0.01), and a higher frequency of localized retinal nerve fiber layer (RNFL) defects (P = 0.02) than early PACG (n = 20).Conclusion:In the early stage of the disease, POAG compared to PACG may be characterized by deeper disc cupping, a larger beta zone of peripapillary atrophy, and a higher frequency of localized RNFL defects. Such differences in early glaucoma may suggest differences in pathophysiology in POAG and PACG.     

Localized wedge-shaped defects of retinal nerve fiber layer and disc hemorrhage in glaucoma.

OBJECTIVE: To evaluate frequencies of localized wedge-shaped defects of the retinal nerve fiber layer (RNFL) in eyes with and without disc hemorrhage in normal-tension glaucoma (NTG) and primary open-angle glaucoma (POAG). This study also aims to define a topographic correlation between disc hemorrhage and localized RNFL defects in POAG. DESIGN: Cross-sectional study. PARTICIPANTS AND CONTROLS: The authors studied 83 eyes of 83 patients with NTG (male/female = 23/60; age, 58.8+/-12.9 years) and 20 eyes of 20 patients with POAG (male/female = 9/11; age, 61.6+/-11.4 years); subjects in both groups had developed new disc hemorrhage at the time of enrollment. The authors randomly selected 45 eyes of 45 patients with NTG (male/female = 20/25; age, 62.0+/-9.3 years) and 24 eyes of 24 patients with POAG (male/female = 13/11; age, 56.3+/-14.5 years) with no history of disc hemorrhage during the follow-up period of more than 2 years. METHODS: Visual field in the patients with POAG was matched to that of the patients with NTG regarding global indices for both the hemorrhage and the nonhemorrhage groups. Localized wedge-shaped defects of RNFL were identified by scanning laser ophthalmoscopy using an argon-blue laser. MAIN OUTCOME MEASURES: The frequency of localized RNFL defects and the relationship between the locations of disc hemorrhages and localized RNFL defects were determined. RESULTS: Localized wedge-shaped defects of RNFL occurred significantly more often in the hemorrhage group than in the nonhemorrhage group in both NTG (Fisher's exact probability test, P < 0.0001) and POAG (P < 0.05) patients. Regardless of the presence of disc hemorrhage, there was no significant difference in the frequency of localized RNFL defects between patients with NTG and those with POAG. Most disc hemorrhages were present in the vicinity of the border between localized RNFL defects and relatively healthy-looking RNFL in both patients with POAG and those with NTG. CONCLUSION: Disc hemorrhage is associated with localized damage of RNFL in both NTG and POAG.     

Genetic contributions to glaucoma: heritability of intraocular pressure, retinal nerve fiber layer thickness, and optic disc morphology

PURPOSE: The genetic etiology of primary open-angle glaucoma (POAG) is still largely unknown, because of its complexity and disparities in its classification. This study was undertaken to determine the genetic contribution to various early, continuous markers of POAG by assessing the heritability of intraocular pressure (IOP), retinal nerve fiber layer (RNFL) thickness, and neuroretinal rim and optic disc parameters in a genetically isolated population. METHODS: A total of 2620 subjects (mean age, 48 years; range 18-86) from extended pedigrees living in a small town in The Netherlands underwent an extensive ophthalmic examination. Their IOP was measured by Goldmann applanation tonometry, their RNFL thickness by scanning laser polarimetry (GDx VCC), and their optic disc parameters by confocal scanning laser ophthalmoscopy (HRT II). Risk associations were explored by linear regression analyses and heritability estimates by variance component methods. RESULTS: Inbreeding was present in 2042 (81%) participants, and was significantly associated with a higher IOP (P < 0.001). The heritability estimate for IOP was 0.35 (95% confidence interval [CI], 0.27-0.43); for RNFL thickness, 0.48 (95% CI, 0.35-0.60); and for neuroretinal rim area, 0.39 (95% CI, 0.20-0.58). Nongenetic factors accounted for only a small proportion (相似文献   

频域光学相干断层扫描（OCT）测量视盘参数及视网膜厚度在早期青光眼诊断中的作用

目的　探讨频域光学相干断层扫描（optical coherence tomography,OCT）测量视盘参数及视网膜厚度在早期青光眼诊断中的作用。方法　采用频域OCT测量40例（40眼）健康志愿者（对照组）和85例（85眼）原发性开角型青光眼（primary open angle glaucoma,POAG）患者［早期青光眼亚组（n=36）和进展期青光眼亚组（n=49）］视盘参数及视网膜神经纤维层（retinal nerve fiber layer,RNFL）厚度,比较各组RNFL厚度、视盘参数并与视野平均缺损（mean deviation,MD）值进行相关性分析,采用ROC曲线下面积评估视盘周围区RNFL厚度及视盘参数在青光眼中的诊断效果。结果　POAG组患者颞侧、上方、鼻侧及下方象限RNFL厚度和全周RNFL厚度均显著低于对照组（均为P<0.05）,且与早期青光眼组比较,进展期青光眼组患者颞侧、上方、鼻侧及下方象限RNFL厚度和全周RNFL厚度均显著降低（均为P<0.05）。各组除视盘面积外,其他视盘参数比较差异均具有统计学意义（均为P<0.05）。Pearson相关性分析显示,POAG组患者视盘颞侧、上方、下方象限RNFL厚度及全周RNFL厚度与MD均呈负相关（均为P<0.05）,而视盘参数中视杯容积和视杯/视盘面积比与MD均呈正相关（均为 P<0.05）,盘缘面积、盘缘容积和视盘容积与MD均呈负相关（均为P<0.05）。经ROC曲线分析显示,视盘周围区下方象限RNFL厚度的曲线下面积最大为0.886,其特异度和敏感度分别为0.775和0.924;视盘参数中视杯/视盘面积比曲线下面积最大,其特异度和敏感度分别为0.741和0.815。结论　OCT检测视盘结构和RNFL厚度能够用于青光眼早期诊断,且具有较高敏感度和特异度。     

Optic disc topography as measured by confocal scanning laser ophthalmoscopy and visual field loss in Japanese patients with primary open-angle or normal-tension glaucoma

PURPOSE: To determine whether differences in the optic disc topography and those in the relation between the optic disc topography and visual field indices exist between Japanese patients with primary open-angle glaucoma (POAG) and normal-tension glaucoma (NTG). METHODS: The study included consecutive Japanese patients with POAG (n = 60) or NTG (n = 60). Using the Heidelberg Retina Tomograph (HRT), we measured disc area, cup area, cup-to-disc area ratio, rim area, cup volume, rim volume, cup shape measure, and height variation contour. Each HRT parameter was measured in the total optic disc and in its four 90 degree quadrants (superior, temporal, inferior, and nasal). The mean deviation for the entire field and the sum of the total deviation values corresponding to each optic disc quadrant were calculated using the Humphrey full-threshold 30-2 program. RESULTS: No significant differences were found between the POAG and NTG groups for any HRT parameter either globally or regionally. There were no significant differences between the two groups in the correlation coefficients between any HRT parameter and the corresponding visual field indices either globally or regionally. CONCLUSION: No significant differences were apparent between Japanese patients with POAG and NTG both in the optic disc parameters as measured by HRT and in the degree of correlation between HRT parameter and the corresponding visual field indices.