高度近视眼黄斑视网膜神经上皮层厚度的OCT测量

目的应用光学相干断层成像(OCT)技术探讨高度近视眼黄斑视网膜神经上皮层厚度的变化.方法将高度近视眼47例(47眼)和正常对照者42例(42眼)分为高度近视组和对照组,OCT测量黄斑中心凹中心和边界的神经上皮层厚度以及视网膜地形图各地区域平均厚度,比较两组间有无差异.结果与对照组相比,高度近视组的中心凹中心和边界和神经上皮层变薄非常显著,旁中心凹鼻侧和下方区域以及周边中心凹神经上皮层平均厚度变薄非常显著;旁中心凹颞侧和上方区域神经上皮层平均厚度变薄显著;但中心凹神经上皮层平均厚度无明显变化.结论高度近视眼黄斑视网膜神经上皮层厚度明显低于正常眼.OCT测量神经上皮层厚度时,应综合分析某一点厚度和该点所在区域平均厚度.

OCT measurement of the neurosensory retinal thickness in the macula in high myopia eyes

Objective To investigate the changes of the neurosensory retinal thickness in the macula in high myopia eyes by optical coherence tomography (OCT). Methods A total of 47 cases (47 eyes) of high myopia eyes and 42 cases (42 eyes) of normal eyes were divided into high myopia group and control group, respectively. The neurosensory retinal thickness in the center and at the edge of the fovea was measured by OCT. Meanwhile, the mean thickness of the neurosensory retina on OCT macular map was calculated automatically. The neurosensory retinal thickness in high myopia group was compared with that in the control group by t test. Results In high myopia group, the neurosensory retinal thickness in the center and at the edge of the fovea, parafovea, and perifovea was significantly thinner than that in the control group. However, no significant difference in the average thickness of neurosensory retina of the fovea was found between the two groups. Conclusion The thickness of the neurosensory retina in the macula in high myopia eyes is significantly thinner than that in normal eyes. When measurement of the neurosensory retinal thickness by OCT is performed, the thickness of a spot and the thickness of the area in which the spot is located should be considered.