急性闭角型青光眼视网膜神经纤维层改变的一年动态观察

目的观察急性闭角型青光眼视网膜神经纤维层（RNFL）厚度在发病后不同时间段的变化特征。设计前瞻性病例系列。研究对象2007—2009年就诊的急性闭角型青光眼单眼发病者35例35眼。方法人选患者经过临床治疗后眼压控制正常，利用相干光断层扫描（StratusOCT3）技术在发病后2周、3个月、6个月和12个月进行双眼RNFL扫描，并对发作眼压与RNFL厚度进行相关性分析。主要指标RNFL厚度。结果发作后2周发作眼RNFL明显较对侧眼增厚，分别为（141．85±25．22）μm、（112．95±10．54）μm（P=-0．000）；第3个月时两眼没有差异，RNFL厚度分别为（112．38±16．15）μm、（112．26±16．04）μm（P=0．966）；6个月时发作眼较对侧眼稍薄，分别为（101．22±14．06）μm、（108．65±15．03）μm（p=0．021）；12个月时发作眼明显较对侧眼薄，分别为（92．29±13．05）um、（106．77±14．90）μm（P=0．000）。发作眼在观察期内RNFL进行性变薄（阽51．48，P=0．000），而对侧眼则无显著改变（F=1．599，P=0．192）。早期（3个月内）眼压越高，RNFL越厚（r=0．692，P=-0．000），但在12个月RNFL的变化中，发作眼压与之无显著相关（r=0．242，P=0．081）。结论急性闭角型青光眼发作眼缓解后RNFL仍进行性丢失，发作时眼压的高低并不是决定最终病变的惟一因素；对侧眼在12个月的观察中也存在一定程度RNFL损害，其临床意义有待进一步研究。     

急性闭角型青光眼急性发作后视网膜神经纤维层厚度与视盘血流变化的相关性

目的观察原发性急性闭角型青光眼(acute primary closure-angle glaucoma,APACG)急性发作后视网膜神经纤维层厚度(Retinal nerve fiber layer thickness,RNFLT)和视盘血流的变化。设计前瞻性比较性病例系列。研究对象抚顺市眼病医院2017年1月至2017年6月APACG急性发作的患者41例。方法急性发作41眼为观察组,同一批患者未发作41眼为对照组。在眼压控制正常后1周、3个月、6个月用Spectralis OCT测量盘周RNFLT、AngioVue OCT测量盘周血管密度(vessel density,VD)。采用广义估计方程比较不同观察时间点指标的差异性;Pearson相关分析探索RNFLT和盘周VD的相关性。主要指标盘周RNFLT值、盘周VD值。结果发作眼1周时颞侧、颞上方、颞下方RNFLT较对侧眼明显增厚(P均<0.001);3个月时鼻上方、鼻下方RNFLT明显低于对侧眼(P均<0.001);6个月时鼻侧、鼻上方、鼻下方RNFLT明显低于对侧眼(P=0.011、0.000、0.000)。发作眼3个月、6个月与1周各参数自身相比,各象限RNFL厚度均明显变薄(P均<0.001)。发作眼盘周VD于1周、3个月、6个月随访过程中呈持续下降,3个月、6个月视盘鼻侧VD均较1周明显下降(P=0.001、0.001);视盘颞上方、颞下方、鼻上方及颞侧VD均持续下降,6个月较1周明显下降(P=0.007、0.011、0.013、0.008)。发作眼较对侧眼盘周VD各个参数均明显下降(P均<0.05)。1周时盘周VD和对应象限的RNFLT无相关性(P均>0.05),而在3个月与6个月时两者的变化具有相关性(P均<0.05)。结论APACG急性发作眼压控制后早期RNFLT增厚,3~6个月持续变薄。盘周VD在半年内持续下降,且盘周VD与RNFLT整体变化趋势一致。     

青光眼睫状体炎综合征视网膜神经纤维层厚度变化的初步研究

目的观察青光眼睫状体炎综合征（ PSS）发作后3个月内视网膜神经纤维层厚度（ RNFLT）的变化。方法用相干光断层扫描仪（OCT）对28例（28只眼）PSS患者发作眼眼压控制后3 d内及3个月的双眼RNFLT进行测量，发作眼与对侧眼的RNFLT进行比较，不同时间点之间进行比较。结果 PSS发作眼组急性发作3 d内的视网膜神经纤维层平均厚度及各象限厚度与发作3个月后的比较，差异无统计学意义。 PSS发作眼组急性发作3 d内及3个月后的视网膜神经纤维层平均厚度及各象限厚度分别与同时期的对侧眼组及正常对照组进行比较，差异均无统计学意义（ P ＞0．05）。结论 PSS属于一种预后较好的疾病，短期内反复发作无视功能损害。     

临床前期急性闭角型青光眼眼前部巩膜厚度测量

目的探讨急性闭角型青光眼(APACG)与正常人前部巩膜厚度的差异。设计前瞻性比较性病例系列。研究对象北京同仁眼科中心APACG患者57例(57眼),同期正常人57例(57眼)。方法对上述患者行超声生物显微镜(UBM)检查测量眼前部巩膜厚度及中央角膜厚度;非接触眼压计测量眼压;IOL Master测量眼轴长度。眼前部巩膜厚度的测量取自颞侧象限巩膜突后2 mm处。组间各参数比较采用独立样本t检验;眼前部巩膜厚度与中央角膜厚度、眼压、眼轴的关系采用多元线性回归分析。主要指标眼前部巩膜厚度、眼压、中央角膜厚度、眼轴长度。结果 APACG临床前期眼及正常对照眼的前部巩膜厚度分别为(625.42±41.45)μm、(594.42±46.06)μm,差异有统计学意义(t=3.78,P=0.0001);中央角膜厚度分别为(537.08±34.68)μm、(529.90±39.69)μm,差异无统计学意义(t=1.03,P=0.153);眼压分别为(16.70±3.75)、(17.00±3.92)mm Hg,差异无统计学意义(t=0.42,P=0.338);眼轴长度分别为(20.78±1.23)、(23.56±2.21)mm,差异有统计学意义(t=8.30,P=0.000)。多元线性回归显示,APACG眼前部巩膜厚度与眼轴有关(P=0.009),前部巩膜厚度=877.144–12.135×眼轴。结论 APACG患者前部巩膜厚度较正常眼厚;这可能作为发病机制之一参与了APACG的急性发作。     

准分子激光原位角膜磨镶术对视网膜神经纤维层厚度的影响

目的 研究准分子激光原位角膜磨镶术(laser in situ keratomileusis,LASIK)对视网膜神经纤维层(retinal nerve fibre layer,RNFL)厚度的影响.方法 选择拟行LASIK患者90例90眼,根据术前屈光程度分为3组:轻度、中度、高度近视组.分别于术前及术后1 d、3 d、1周、1个月进行光学相干断层扫描检查,测量视盘周围RNFL厚度.结果 轻度组术前及术后1 d、3 d、1周、1个月RNFL平均厚度分别为(114.95±11.61)μm、(97.63±13.81)μm、(97.62±14.00)μm、(112.28±13.58)μm、(112.33±13.72)μm;中度组各时间点RNFL平均厚度分别为(113.75±13.74)μm、(107.54±10.03)μm、(111.27±11.34)μm、(114.34±10.51)μm、(114.84±9.79)μm;高度组各时间点RNFL平均厚度分别为(107.80±14.71)μm、(100.91±15.31)μm、(102.34±14.00)μm、(109.70±15.19)μm、(108.94±14.24)μm.3组术后1 d、术后3 d RNFL平均厚度较术前减少,差异有统计学意义(P＜0.05);术后1周、1个月RNFL平均厚度与术前比较差异无统计学意义(P＞0.05).术后1 d、3 d 3组间RNFL平均厚度变化比较差异无统计学意义(F=0.006,P＞0.05;F=0.438,P＞0.05).结论 LASIK术后早期RNFL减少,以后逐渐恢复,1周恢复至正常水平.从远期效果来看此手术是安全的.     

急性闭角型青光眼手术后角膜厚度的改变

目的 研究急性闭角型青光眼第1次发作经抗青光眼手术治疗缓解后角膜厚度是否发生改变.方法 选择单眼急性闭角型青光眼第1次发作经手术治疗缓解者40例40眼,对侧未发作眼(40只)做为对照.通过手术眼压控制到正常范围2周后,以超声角膜测厚仪测量中央角膜厚度,采用配对t检验对发作眼和对侧眼的角膜厚度进行统计分析;结果就诊时患者症状持续时间1～3 d者占总例数的75.00%(30/40),眼压>60mmHg者(1 mmHg=0.133 kPa)占总例数的80%(32/40).发作跟测得中央角膜厚度平均为(531.24±33.08)μm,对侧眼为(538.29±30.53)μm.发作眼较对侧眼薄,差异有统计学意义(P<0.001).结论 急性闭角型青光眼的第1次发作经抗青光眼手术治疗后,发作眼中央角膜厚度较对侧眼薄.     

原发性慢性闭角型青光眼视网膜神经纤维层损害及相关因素研究

目的 观察原发性慢性闭角型青光眼患者(chronic primary angle closure glaucoma,CACG)活体视网膜神经纤维层(retinal nerve fiberlayer thickness,RNFL)损害;分析CACG不同房角粘连程度间RNFL差异及平均RNFL厚度和视野平均缺损(mean visual fielddefects,MD)的相关性.方法 对CACG患者36例(64只眼)和正常人82名(82只眼)用光学相干断层扫描仪(optical coherence tomography,OCT)测量RNFL厚度,比较两者间的差异;比较CACG中无房角粘连、房角粘连范嗣＜1/2和≥1/2圆周眼的RNFL损害的差异;对CACG平均RNFL与相应视野的MD值进行Pearson直线相关分析.结果 CACG平均RNFL(80.61±23.96)μm与正常人(103.7±9.92)μm比较有统计学差异(P＜0.05);CACG平均RNFL厚度在无房角粘连眼(98.46±12.34)μm、粘连范围＜1/2(93.93±14.78)μm和粘连≥1,2圆周眼(69.78±23.82)μm的RNFL的差异有统计学意义(P＜0.05).CACG平均RNFL厚度与视野缺损(MD值)呈正相关(r=0.652,P＜0.001).结论 CACG的RNFL较正常人明显减少;随着CACG病程的发展,平均RNFL厚度减少,视野平均缺损增加.     

FD—OCT对原发性急性闭角型青光眼视网膜厚度和体积的测量

背景原发性急性闭角型青光眼（PAACG）大发作后可引起不同程度的视功能损害,了解PAACG发作眼视盘及黄斑区视网膜的结构改变对于判断患眼的预后具有重要的临床意义。傅里叶域OCT（FD-OCT）是测量视网膜结构的有用工具。目的采用FD—OCT对PAACG大发作后视盘区视网膜神经纤维层厚度（RNFLT）、黄斑区厚度以及黄斑区体积的变化进行测量,并与正常眼进行比较。方法采用病例对照临床试验方法。收集2011年4月至2012年2月在温州医学院眼视光医院确诊为PAACG且有一侧眼大发作的患者25例,并纳入同期年龄和性别相匹配的正常志愿者25人25眼为正常对照眼,于PAACG患眼大发作后2周由同一位操作熟练的检查者采用FD—OCT测量患者发作眼、对侧眼和正常对照眼RNFLT、黄斑区厚度及黄斑区体积。结果PAACG发作后2周内发作眼组视盘区平均RNFLT值为（125．72±28．57）μm,明显高于对侧眼组的（108．36±9．31）μm和正常对照眼组的（106．10±10．97）μm,差异均有统计学意义（P〈0．05）;此外,发作眼组视盘上方、下方、鼻侧象限RNFLT值均明显高于对侧眼组和正常对照眼组,差异均有统计学意义（P〈0．05）,而视盘颞侧象限和颞下象限RNFLT值的差异均无统计学意义（P=0．081、0．766）。发作眼组、对侧眼组和正常对照眼组黄斑区视网膜平均厚度分别（283．72±18．33）、（280．28±16．85）和（289．14±10．60）“m,3个组间黄斑区各象限视网膜厚度值差异无统计学意义（FH镕=2．048,P=0．136）,其中对侧眼组视网膜厚度值均明显低于正常对照眼组（P〈0．05）,发作眼组与正常对照眼组间差异无统计学意义（P=0．224）。发作眼组、对侧眼组和正常对照眼组黄斑区总体积分别为（5．589±O．355）、（5．532±0．325）和（5．720±0．241）mm。,黄斑区各象限体积比较差异无统计学意义（F＊。=1．027,P=0．363）。各组外环各象限厚度值均明显小于内环厚度值,内环及外环黄斑区视网膜厚度值均呈鼻侧〉上方〉下方〉颞侧的趋势。PAACG患者发作眼和对侧眼在视盘内环颞侧、上方、鼻侧、下方和外环颞侧、中央区黄斑区厚度值及其体积值均明显低于正常对照眼,差异均有统计学意义（P〈0．05）。结论PAACG发作眼发作2周内视盘区RNFL水肿比黄斑区更明显,发作眼和对侧眼的黄斑区视网膜均比正常对照眼变薄,其黄斑区体积均小于正常对照眼。     

多发性硬化患者视神经炎发作早期的相干光断层扫描表现

目的 探讨多发性硬化(MS)患者在视神经炎发作早期的视网膜神经纤维层(RNFL)、黄斑区节细胞复合体层(GCC)及视神经乳头的改变.方法 前瞻性系列病例研究.2007年2月至2010年11月中国医学科学院北京协和医学院北京协和医院眼科疑似视神经炎急性发作的MS患者22例,在其急性视神经炎发作1周内,应用相干光断层扫描技术(OCT)对其进行检查,测量RNFL平均厚度、GCC平均厚度,对RNFL地形图和视神经乳头三维重建进行分析.结果 MS患者视神经炎发作1周内,首次发作的视神经炎早期眼的RNFL平均厚度为(141.55±53.73)μm,其中有75％( 12/16)的受检眼RNFL平均厚度增加,GCC平均厚度范围为91.54～118.45μm,其中64％(7/11)的受检眼G CC平均厚度增加;复发的视神经炎早期眼的RNFL平均厚度为(59.71±8.98)μm,其中有91.7％(11/12)的RNFL平均厚度变薄,GCC平均厚度范围为58.92 ～91.76 μm,其中62.5％(5/8)的受检眼GCC平均厚度较正常薄;视神经炎发作早期眼的对侧眼的RNFL平均厚度为(125.45±26.16) μm,其中60％( 6/10)的受检眼RNFL平均厚度增加,GCC平均厚度范围为90.35～117.37μm,43％ (3/7)的受检眼GCC平均厚度增加;OCT较直接眼底镜检查可以更多发现视神经乳头水肿和RNFL增厚.结论 MS患者在视神经炎首次发作早期、复发早期具有不同程度的RNFL、GCC及视神经乳头改变.应用OCT可以检测到相关的变化.     

原发性急性闭角型青光眼发作后RNFL的变化

目的:观察原发性急性闭角型青光眼(primary acute angle-closure glaucoma,PAACG)发作缓解后视网膜神经纤维层(retinal nerve fiber layer,RNFL)厚度的变化规律。方法:PAACG发作患者36例在治疗缓解后2,4,8,12wk测量平均RNFL厚度和上方、颞侧、下方、鼻侧RNFL厚度,分别与对照眼比较并分析发作眼RNFL厚度随时间的变化。结果:RNFL厚度在2wk和4wk时,发作眼和对侧眼比较差异无显著性;发作眼重复测量分析结果表明,伴随访时间的延长发作眼各个象限的RNFL厚度逐渐变薄,其中2wk与4,8,12wk比较均有统计学意义(均P<0.01)。其余各时间之间差别无显著性意义。结论:PAACG单次发作缓解后对RNFL造成损害,这种损害主要发生于下方,在眼压缓解后8wk内仍继续进展。     

The damage patterns of retinal nerve fiber layer in acute and chronic intraocular pressure elevation in primary angle closure glaucoma

 Purpose: To observe the differences of damage patterns of retinal nerve fiber layer (RNFL) between acute and chronic intraocular pressure (IOP) elevation in primary angle closure glaucoma (PACG) using optical coherence tomography (OCT). Methods: Twenty four patients (48 eyes) with unilateral acute PACG (APACG) attack in the 6 months after remission and 36 patients (64 eyes) with chronic PACG (CPACG) were included in this prospective study. For all cases, IOP has been controlled less than 21 mm Hg after treatment. Using stratus OCT, the RNFL thickness was assessed in eyes with PACG within 3 days, 2 weeks, 1, 3 and 6 month after IOP controlled. Repeated measures ANOVA was used to examine the time course of changes after IOP controlled in RNFL thickness in both acute attack and unaffected fellow eyes of APACG and eyes with CPACG. Results: The mean RNFL thickness (μm) for the APACG-attacked eyes increased significantly within 3 days (121.49±23.84) after acute strike and then became thinner along with time (107.22±24.72 at 2 week, 93.58±18.37 at 1 month, 84.10±19.89 at 3 month and 78.98±19.17 at 6 month). In APACG-attacked eyes, there were significant differences of average RNFL thickness among 5 different times after IOP was controlled (P ＜ 0.001). In the APACG unaffected fellow eyes and CPACG eyes, there were no significant differences in mean RNFL thickness among 5 different times (F = 0.450, P = 0.104 in APACG unaffected fellow eyes and F = 1.558, P = 0.200 in CPACG eyes). There was significant difference for interaction between time periods and groups (F = 1.912,P = 0.003). Conclusion:  RNFL damage patterns are different under different IOP elevated courses. In APACG, RNFL was found to be swollen and thickening right after acute attack and then becomes thinning and atrophy along with the time, while RNFL was found to be diffused thinness in CPACG.     

Damage patterns of retinal nerve fiber layer in acute and chronic intraocular pressure elevation in primary angle closure glaucoma

AIM: To observe the differences of damage patterns of retinal nerve fiber layer (RNFL) between acute and chronic intraocular pressure (IOP) elevation in primary angle closure glaucoma (PACG) using optical coherence tomography (OCT). METHODS: Twenty-four patients (48 eyes) with unilateral acute PACG (APACG) attack in the 6 months after admission and 36 patients (64 eyes) with chronic PACG (CPACG) were included in this prospective study. For all cases, IOP has been controlled under 21mmHg after treatment. Using stratus OCT, the RNFL thickness was assessed in eyes with PACG within 3 days, 2 weeks, 1, 3 and 6 months after IOP was controlled. Repeated measures ANOVA was used to examine the changes of RNFL thickness at different time after IOP being controlled in both acute attack eyes and unaffected fellow eyes of APACG and eyes with CPACG. RESULTS: The mean RNFL thickness for the APACG- attacked eyes increased significantly within 3 days (121.49±23.84)μm after acute onset and then became thinner along with time [(107.22±24.72)μm at 2 weeks,(93.58±18.37)μm at 1 month, (84.10±19.89)μm at 3 months and (78.98±19.17)μm at 6 months]. In APACG-attacked eyes, there were significant differences of average RNFL thickness at 5 different times after IOP was controlled (P＜0.001). In the APACG unaffected fellow eyes and CPACG eyes, there were no significant differences in mean RNFL thickness at 5 different times(F=0.450, P=0.104 in APACG unaffected fellow eyes and F=1.558, P=0.200 in CPACG eyes). There was significant difference for interaction between time periods and groups (F=1.912, P=0.003). CONCLUSION: RNFL damage patterns are different under different IOP elevated courses. In APACG, RNFL was found to be swollen and thickening right after acute attack and then becomes thinning and atrophy along with the time, while RNFL was found to be diffused thinness in CPACG.     

Retinal nerve fiber layer thickness changes in patients with age-related macular degeneration treated with intravitreal ranibizumab

Purpose. To assess the effects of intravitreal ranibizumab therapy on intraocular pressure (IOP) and retinal nerve fiber (RNFL) thickness. Methods. Forty-nine eyes of 49 patients with neovascular age-related macular degeneration (AMD) treated with intravitreal ranibizumab injections and 27 fellow eyes not requiring treatment were followed for 1 year. RNFL thickness, as measured by Fourier domain optical coherence tomography, and IOP were determined pre- and postinjection. Results. After 12 months, the mean number of injections received was 4.8 ± 1.6. The incidence of IOP elevations (>5 mm Hg over baseline) observed at the time of injection was 0.4%. Baseline RNFL thickness was 105.7 ± 12.2 μm in the treatment group compared with 101.8 ± 11.6 μm in the control group (P = 0.176). At the end of follow-up, significant RNFL thinning was noted in the treatment group (100.2 ± 11.0 μm, P < 0.001), whereas no differences were found in the control group (100.5 ± 10.8 μm, P = 0.477). Conclusions. Intravitreal ranibizumab injections used to treat AMD caused a significant change in RNFL thickness after 12 months of follow-up.     

单眼发病的原发性开角型青光眼黄斑脉络膜厚度及影响因素初探

目的:初步探讨原发性开角型青光眼（POAG）单眼发病患者黄斑中心凹下脉络膜厚度（SFCT）与其对侧眼和健康人的差异及其影响因素。方法:横断面研究。收集2018年9月至2019年9月就诊于首都医科大学附属北京同仁医院青光眼门诊确诊为POAG的单眼发病、对侧眼正常的患者（POAG组）以及健康志愿者（健康对照组）。对所有参与...     

Changes in retinal nerve fiber layer thickness after acute primary angle closure

PURPOSE: To evaluate the changes in retinal nerve fiber layer (RNFL) thickness in the first 16 weeks after acute primary angle closure (APAC) using scanning laser polarimetry (SLP). DESIGN: Prospective, observational case series. PARTICIPANTS: Thirty-seven Asian subjects with APAC. METHODS: For all cases, APAC had resolved after treatment, and the study was conducted during the follow-up period after the acute episode. Using the GDx Nerve Fiber Analyzer (Laser Diagnostic Technologies, San Diego, CA), the RNFL was assessed in both eyes 2 weeks after APAC, and again after 16 weeks. The SLP parameters were compared between week 2 and week 16 within affected and fellow eyes. A multiple logistic regression analysis was carried out to analyze factors likely to influence RNFL outcome. MAIN OUTCOME MEASURES: Superior and inferior average RNFL thickness. RESULTS: The mean age of study subjects was 60.1+/-10.3 years (range, 46-91 years), and most subjects were female (68%) and Chinese (86%). In APAC eyes, the superior average RNFL thickness decreased from 63.8+/-13.6 microm to 61.4+/-11.2 microm (P = 0.04) and the inferior average RNFL thickness decreased from 69.5+/-14.4 microm to 66.3+/-12.6 microm (P = 0.005). There was also a decrease in inferior ratio (P = 0.008) and ellipse modulation (P = 0.02). In the fellow eyes, there was no difference found between week 2 and week 16 for any of the SLP parameters studied. Logistic regression analysis showed no significant association between developing a 10% reduction in either superior or inferior RNFL thickness with age, gender, history of ischemic risk factors, duration of symptoms during APAC, the level of presenting intraocular pressure (IOP), or the development of a rise in IOP between study visits. CONCLUSIONS: After an episode of APAC, superior and inferior average RNFL thickness was found to decrease significantly from week 2 to week 16.     

单眼屈光参差性弱视眼视网膜神经纤维层厚度分析

目的:比较单眼屈光参差性弱视患者弱视眼和非弱视眼视盘周围视网膜神经纤维层(retinal nerve fiber layer,RNFL)的厚度。方法:选择38例不伴有斜视的单眼屈光差性弱视患者,应用光学相干断层成像技术(OCT)测量其弱视眼和非弱视眼的视盘周围RNFL平均厚度。结果:弱视患者38例的平均年龄为10.73岁,弱视眼RNFL平均厚度为106.38±12.05μm,下方象限RNFL(I):133.67±19.44μm最厚,其次为上方象限(S):123.31±13.95μm,鼻侧象限(N):89.96±17.71μm,颞侧象限(T):70.06±10.18μm最薄;单眼屈光参差性弱视中,弱视眼的RNFL平均厚度和鼻侧象限RNFL厚度较对侧非弱视眼厚,差异具有统计学意义(P=0.016;P=0.01)。结论:单眼屈光参差性弱视患者弱视眼的RNFL厚度较非弱视眼厚,以鼻侧象限RNFL厚度和RNFL平均厚度的差异最为显著。     

The Study of Retinal Nerve Fiber Layer Thickness of Normal Eyes Using Scanning Laser Polarimetry

Purpoe: To evaluate retinal nerve fiber layer (RNFL) thickness measurements in local normal Chinese subjects of different age groups and analyse the correlation of RNFL thickness with age using scanning laser polarimetry (SLP, GDxVCC). To assess the reproducibility of RNFL thickness measurement with GDxVCC.Methods: The RNFL thickness of 67 normal subjects (123 eyes) were measured by GDxVCC. The average TSNIT parameters were calculated. The differences of RNFL thickness between sex, right and left eyes, superior and inferior were compared. The relationship between RNFL thickness and age was analyzed with correlation analysis and linear regression analysis. The intraclass correlation coefficients (ICC) of three images in every eye were calculated.Results: The average peripapillary RNFL thickness at the superior, inferior and whole ellipse regions in 123 eyes of 67 normal subjects were (70.30±6.76)μm, (67.35±6.77) μm and (56.87±4.53) μm, respectively. The average TNSIT standard deviation was 23.68±4.61 and the average inter-eye symmetric value was 0.86±0.11. There were significant difference of RNFL thickness between superior and inferior (t=4.952,P ＜0.001 ). There were significant difference of inferior RNFL thickness and TNSIT standard deviation between right and left eyes (P=0.005 and 0.002),while not significant difference of superior RNFL thickness and whole mean RNFL thickness between right and left eye (P=0.086 and 0.529). There was no significant difference in TSNIT parameters between different genders. There was a slight negative correlation average RNFL thickness in superior sector with age (decreased approximately 0.15 microns per year,P=0.047) in the subjects aged below 60 years old. The ICC values of RNFL thickness were ＞0.8 in superior, inferior and global.Conclusions: The RNFL thickness can be measured accurately by GDxVCC and the reproducibility of RNFL thickness measurement by GDxVCC is good. There was a slight negative correlation between average RNFL thickness in superior with age. More researches on the effects of age on RNFL thickness by GDxVCC are needed.     

Optical coherence tomography measurement of retinal nerve fiber layer after acute primary angle closure with normal visual field

PURPOSE: To detect retinal nerve fiber layer (RNFL) thickness after a single acute primary angle closure (APAC) attack with normal visual field. DESIGN: Prospective, observational case study. METHODS: Twenty-eight patients who had a single unilateral APAC attack associated with normal visual fields at three months after remission and 28 single eyes from normal controls were enrolled. Duration of APAC attack was 5.9 +/- 2.7 hours. Comparisons of average RNFL thickness and RNFL thickness in four quadrants and in 12-o'clock-hour segments of the attacked eyes, unaffected fellow eyes, and normal controls were made using fast RNFL thickness (3.4) of Stratus optical coherence tomography. RESULTS: Significant differences were demonstrated comparing the inferior-quadrant RNFL thicknesses for the attacked eyes with those of the normal controls (P = .02) and fellow eyes (P = .02) using one-way analysis of variance with Tukey's tests. CONCLUSIONS: Inferior region RNFL thickness was significantly decreased in the attacked eyes after an APAC episode associated with normal visual field.