目的：通过真实的临床病例，分析青光眼与非青光眼性视神经病变的不同表现，提高疾病的鉴别诊断能力。方法：采用病例研究与文献回顾方法，记录3例易误诊为正常眼压性青光眼（normal tension glaucoma, NTG）的神经眼科病例，通过视力、眼压、瞳孔对光反应、视盘形态、RNFL厚度、视野损害等特点，抽丝剥茧，得出诊断。结果：病例1视野呈弓形缺损，但视盘凹陷不深，且对侧眼“视盘拥挤”，随访期间发生急性前部缺血性视神经改变(anterior ischaemic optic neuropathy, AION)，最终确诊“AION遗留视神经萎缩”。病例2视力下降、视野缺损与视神经结构损害不相符，经完善MRI确诊为“左侧视神经鞘膜瘤”。病例3青年男性，中心视力下降，视盘凹陷不深，根据DNA结果确诊Leber遗传性视神经病变（Leber hereditary optic neuropathy, LHON）。结论：通过几个典型的神经眼科病例，掌握AION、视神经鞘膜瘤、LHON的结构和功能损害特征，如视盘凹陷不深、中心视力下降、视神经结构损害与视功能不相符，与NTG相鉴别。
Objective: To analyze the differentiating manifestations of glaucomatous and non-glaucomatous optic neuropathies using real clinical cases and to enhance the ability to make differential diagnosis. Methods: By using case study and literature review methods, we recorded three neuro-ophthalmic cases that were prone to being misdiagnosed as normal tension glaucoma (NTG). The diagnosis was established by extracting features related to visual acuity, intraocular pressure, pupillary light reflex, optic disc morphology, retinal nerve fiber layer (RNFL) thickness and visual field damage. Results: Case 1 presented with arcuate visual field defects, shallow optic disc cupping, and contralateral crowded discs. During follow-up, the patient subsequently developed acute anterior ischemic optic neuropathy (AION), and the final diagnosis confirmed was confirmed as optic atrophy secondary to AION. Case 2 exhibited a disproportionate visual acuity decline and visual field defects that were inconsistent with glaucomatous structural damage. MRI confirmed the diagnosis of left optic nerve sheath meningioma. Case 3 involved a young male who presented with central vision loss and shallow optic disc cupping. Genetic testing confirmed Leber's hereditary optic neuropathy (LHON). Conclusions: Through these representative neuro-ophthalmology cases, we illustrate the characteristic patterns of structural and functional damage associated with AION, optic nerve sheath meningioma, and LHON, such as shallow optic disc cupping, central vision loss, and inconsistency between optic nerve structural damage and visual function. These findings highlight the key differentiating features of these conditions from NTG.
目的：应用Cirrus HD-OCT 5000对正常眼黄斑及视盘血流参数进行血管成像测量，评估其可重复性及再现性。方法：纳入40只正常眼进行前瞻性研究。操作者A于一周内3天的同一时段(T1，T2，T3)对正常受试者的同一眼黄斑及视盘进行3次血管成像扫描，扫描过程中均开启FastTracTM图像跟踪功能，操作者B在T 2时间点再次对受试者同一眼进行相同程序扫描，使用Angio PlexMetrixTM量化软件(版本10.0)自动测量黄斑和视盘的血管长度密度(vessel length density，VD)和血管灌注密度(vascular perfusion density，PD)。应用单因素方差分析或非参数检验比较3次扫描的VD、PD是否有差异。采用组内相关系数(intraclass correlation coefficient，ICC)、变异系数(coefficient of variation，CV)评价操作者A的可重复性，采用一致性相关系数(consistent correlation coefficient，CCC)、重复性系数(repeatability coefficient，CR)、C V评价操作者间的再现性。结果：操作者A对黄斑及视盘各区域3次扫描的V D、P D之间差异无统计学意义(P >0.05)。操作者A对黄斑和视盘V D、PD 3次扫描的ICC值分别为0.260~0.517、0.362~0.898，黄斑及视盘各区域V D、P D的C V值均<8.1%。黄斑和视盘V D、P D的操作者间CCC值分别为0.3130~0.5665、0.5149~0.7801；黄斑VD和PD的CR值分别为3.2212~4.6399、0.0574~0.0832；视盘VD和PD的CR值分别为2.0675~4.0630、0.0447~0.0730。黄斑CV值均<9.0%，视盘CV值均<6.9%。结论：非同日的同一时段视盘浅层血流参数具有较好的重复性及再现性，黄斑浅层血流参数的重复性及再现性相对较差。
Objective: To evaluate the repeatability and reproducibility of quantification of macular and peri-papillary superficial capillaries in normal eyes using Cirrus HD-OCT 5000 angiography. Methods: Forty normal eyes were included in this prospective study. Angiography 3 mm × 3 mm scan protocol centered on the disc or macula of the same eye was repeated 3 times by operator A in the same period on 3 days (T1, T2, T3) within 1 week,and the FastTracTM image tracking function was turned on during the scan. Operator B repeated the same scan independently at T2 after operator A. Angio Plex MetrixTM quantification software (version 10.0) was used to automatically measure the vessel length density (VD) and vascular perfusion density (PD) of macular and peri-papillary superficial capillaries. One-way analysis of variance or nonparametric test was used to compare the VD and PD measurements of the 3 scans. The intraclass correlation coefficient (ICC) and coefficient of variation (CV)were calculated to evaluate the intra-operator repeatability. Consistent correlation coefficient (CCC), repeatability coefficient (CR), and CV were calculated to evaluate the inter-operator reproducibility. Results: There was no statistically significant difference in the measurements of VD and PD between the 3 scans of the macular and peri-papillary superficial capillaries by operator A (P>0.05). The ICC values for the 3 scans of VD and PD of the macular and peri-papillary superficial capillaries by operator A were 0.260–0.517 and 0.362~0.898, respectively.The CV values of the VD and PD of the macular and peri-papillary superficial capillaries were all <8.1%. The inter-operator CCC values of the macular and peri-papillary superficial capillaries were 0.3130–0.5665 and 0.5149~0.7801,respectively; the CR values of the VD and PD of macula were 3.2212–4.6399 and 0.0574–0.0832, respectively; the CR values of the VD and PD of optic disc were 2.0675–4.0630 and 0.0447–0.0730, respectively. The CV values of macular were all <9.0%, and the CV values of optic disc were all <6.9%. Conclusion:The macular and peri-papillary superficial capillaries parameters in the same period on different days have a good repeatability and reproducibility,while the superficial macular blood flow parameters have relatively poor repeatability and reproducibility.
目的：应用Cirrus HD-OCT 5000对正常眼黄斑及视盘血流参数进行血管成像测量，评估其可重复性及再现性。方法：纳入40只正常眼进行前瞻性研究。操作者A于一周内3天的同一时段(T1，T2，T3)对正常受试者的同一眼黄斑及视盘进行3次血管成像扫描，扫描过程中均开启FastTracTM图像跟踪功能，操作者B在T2时间点再次对受试者同一眼进行相同程序扫描，使用Angio Plex MetrixTM 量化软件(版本10.0)自动测量黄斑和视盘的血管长度密度(vessel length density，VD)和血管灌注密度(vascular perfusion density，PD)。应用单因素方差分析或非参数检验比较3次扫描的VD、PD是否有差异。采用组内相关系数(intraclass correlation coefficient，ICC)、变异系数(coefficient of variation，CV)评价操作者A的可重复性，采用一致性相关系数(consistent correlation coefficient，CCC)、重复性系数(repeatability coefficient，CR)、CV评价操作者间的再现性。结果：操作者A对黄斑及视盘各区域3次扫描的VD、PD之间差异无统计学意义(P>0.05)。操作者A对黄斑和视盘VD、PD 3次扫描的ICC值分别为0.260~0.517、0.362~0.898，黄斑及视盘各区域VD、PD的CV值均<8.1%。黄斑和视盘VD、PD的操作者间CCC值分别为0.3130~0.5665、0.5149~0.7801；黄斑VD和PD的CR值分别为3.2212~4.6399、0.0574~0.0832；视盘VD和PD的CR值分别为2.0675~4.0630、0.0447~0.0730。黄斑CV值均<9.0%，视盘CV值均<6.9%。结论：非同日的同一时段视盘浅层血流参数具有较好的重复性及再现性，黄斑浅层血流参数的重复性及再现性相对较差。
Objective: To evaluate the repeatability and reproducibility of quantification of macular and peri-papillary superficial capillaries in normal eyes using Cirrus HD-OCT 5000 angiography. Methods: Forty normal eyes were included in this prospective study. Angiography 3 mm × 3 mm scan protocol centered on the disc or macula of the same eye was repeated 3 times by operator A in the same period on 3 days (T1, T2, T3) within 1 week, and the FastTracTM image tracking function was turned on during the scan. Operator B repeated the same scan independently at T2 after operator A. Angio Plex MetrixTM quantification software (version 10.0) was used to automatically measure the vessel length density (VD) and vascular perfusion density (PD) of macular and peri-papillary superficial capillaries. One-way analysis of variance or nonparametric test was used to compare the VD and PD measurements of the 3 scans. The intraclass correlation coefficient (ICC) and coefficient of variation (CV) were calculated to evaluate the intra-operator repeatability. Consistent correlation coefficient (CCC), repeatability coefficient (CR), and CV were calculated to evaluate the inter-operator reproducibility. Results: There was no statistically significant difference in the measurements of VD and PD between the 3 scans of the macular and peri-papillary superficial capillaries by operator A (P>0.05). The ICC values for the 3 scans of VD and PD of the macular and peri-papillary superficial capillaries by operator A were 0.260–0.517 and 0.362~0.898, respectively. The CV values of the VD and PD of the macular and peri-papillary superficial capillaries were all <8.1%. The inter-operator CCC values of the macular and peri-papillary superficial capillaries were 0.3130–0.5665 and 0.5149~0.7801, respectively; the CR values of the VD and PD of macula were 3.2212–4.6399 and 0.0574–0.0832, respectively; the CR values of the VD and PD of optic disc were 2.0675–4.0630 and 0.0447–0.0730, respectively. The CV values of macular were all <9.0%, and the CV values of optic disc were all <6.9%. Conclusion: The macular and peri-papillary superficial capillaries parameters in the same period on different days have a good repeatability and reproducibility, while the superficial macular blood flow parameters have relatively poor repeatability and reproducibility.
