摘要目的 观察视网膜光阈值波动(LTF)与视网膜神经纤维层(RNFL)、神经节细胞复合体(GCC)厚度在原发性开角型青光眼(POAG)高危人群中发生改变的时间关系和诊断准确率及敏感度.方法 纵向队列分析.2009年12月至2017年12月在昆明医科大学第一附属医院眼科就诊且具有POAG高危因素者319例(319只眼)以及正常健康者50名(50只眼)(对照组)纳入研究.高危因素者每6个月、对照受检者每12个月行视野、OCT检查.POAG确诊标准:OCT检查出现垂直C/D≥0.6;视野检查出现早期缺损表现,依据青光眼视野损伤GSS2定量分级标准,中心视野的平均缺损及模式标准差超过临界区为视野早期缺损;检查结果具有连续可重复性.以未出现视野缺损和C/D≥0.6,符合可靠性指标并去除学习效应的第1次视野、OCT检查结果作为基线;当第1次达到POAG确诊标准时记录为转点,同时纳入POAG早期组并结束随访.末次随访后取检查数据以年为单位进行分段统计.观察POAG早期组、对照组受检者随访期间LTF及RNFL、GCC厚度变化规律,比较各时间段丢失速率和变化率,评估其随时间的变化趋势;根据受试者工作特征曲线下面积(AUC)比较各时间段相关因素对POAG的预测价值,以及敏感性.结果 319例319只眼中,进入转点67例67只眼(POAG早期组),其中男性37例、女性30例.POAG早期组、对照组受检者平均随访时间分别为6.6、6.4年.转点时,POAG早期组患者平均RNFL、GCC厚度分别为(79.05±8.09)、(71.58±8.41)μm,平均LTF为(-6.05±7.02)dB;对照组受检者平均RNFL、GCC厚度分别为(93.49±6.24)、(79.72±6.32) μm,平均LTF为(-0.31±0.58) dB.两组受检者平均LTF以及RNFL、GCC厚度间比较,差异均有统计学意义(t=-5.97、-10.42、-5.60,P＜0.001).POAG早期组患者RNFL、GCC厚度以及LTF的AUC随时间推移增大,敏感性逐渐增高.转点前5年至转点,RNFL厚度的AUC分别为0.15、0.65、0.71、0.77、0.85、0.92,敏感性分别为20％、56％、61％、65％、70％、76％;GCC厚度的AUC分别为0.12、0.53、0.69、0.74、0.82、0.90,敏感性分别为14％、53％、69％、74％、82％、90％;LTF的AUC分别为0.10、0.21、0.33、0.75、0.86、0.91,敏感性分别为7％、17％、44％、65％、78％、87％.结论 POAG出现结构性损伤的最早时间为确诊前4年,同期RNFL诊断敏感性优于GCC、LTF;POAG出现视功能损伤最早时间在确诊前2年,同期LTF诊断敏感性度优于RNFL、G-CC.

abstractsObjective To investigate the time relationship of the change,and diagnostic accuracy and sensitivity between retinal light threshold fluctuations (LTF) and retinal nerve fiber layer (RNFL) and ganglion cell complex(GCC) thickness on high-risk primary open-angle glaucoma (POAG).Methods Totally 319 patients (319 eyes) with high-risk in POAG from the First Affiliated Hospital of Kunming Medical Universityand during December 2009 and December 2017,50 healthy individuals (50 eyes) as control were collected in this longitudinal cohort study.Visual field and OCT were reviewed every 6 months on the high-risk group and every 12 months on the control group.High-risk groups inclusion criteria:vertical C/D≥0.6;early visual field defect (according to glaucoma visual field damage GSS2 quantitative grading standards,mean deviation and pattern standard deviation of central field exceeds the border as an early visual field defect);continuous repeatable results.The first field and OCT results in the absence of visual field defects and C/D≥0.6,which were conformed reliability indicators and removed learning effects as a baseline.When patients achieve POAG diagnosis criteria first time which was recorded as a turning point.And they were divided into early group meanwhile were ended of follow-up.After the last follow-up,the inspection data was segmented counted in yearly interval.The changes of LTF,thickness of RNFL and GCC during the follow-up period in the early POAG group and the control group were observed.The loss rate and change rate in each period were compared for the assessment of their trends with time.Followed by calculation of the area under receiver operating curves (AUC) to compare the predicted value of POAG and the sensitivity at 95％ specificity in each period.Results After last follow-up,totally 67 patients 67 eyes (early POAG group,37 males and 30 females) were entered the turning point.The mean follow-up of the early POAG group and the control group were 6.6 and 6.4 years.The average RNFL thickness was 79.05± 8.09 μm,GCC thickness was 71.58 ± 8.41 μm,LTF was -6.05 ± 7.02 dB in early POAG group.The average RNFL thickness was 93.49± 6.24 μrm,GCC thickness was 79.72± 6.32 μm,LTF was-0.31 ± 0.58 dB in the control group.The differences of LTF and the thickness of RNFL and GCC were statistically significant (t=-5.97,-10.42,-5.60;P＜0.001).The AUC of RNFL,GCC thickness and LTF increased with time in the early POAG group.The sensitivity was gradually increased at 95％ specificity:5th year before to at turning point,RNFL thickness AUC was 0.15,0.65,0.71,0.77,0.85,0.92,and sensitivity was 20％,56％,61％,65％,70％,76％,respectively;GCC thickness AUC was 0.12,0.53,0.69,0.74,0.82,0.90,and sensitivity was 14％,53％,69％,74％,82％,90％,respectively;the AUC of LTF was 0.10,0.21,0.33,0.75,0.86,0.91,and sensitivity was 7％,17％,44％,65％,78％,87％,respectively.Conclusions The earliest time of structural functional damage of POAG is at the 4th year before confirmed,simultaneous RNFL diagnosis accuracy and sensitivity are better than GCC and LTF.The earliest time of visual functional damage of POAG is at the 2th year before confirmed,simultaneous LTF diagnosis accuracy and sensitivity are better than RNFL and GCC.