Posterior routes of choroidal blood outflow in high myopia
Posterior routes of choroidal blood outflow in high myopia
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DOI：
10.1097/00006982-199616050-00009
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发表时间：
1996-01-01
影响因子：
3.3
通讯作者：
Tokoro, T
中科院分区：
文献类型：
--
作者：
OhnoMatsui, K;Morishima, N;Tokoro, T
目的：在眼科文献中，少数报告描述了脉络膜血液通过后部途径流出。报告的大多数患者为高度近视;因此，怀疑此类后路与高度近视之间存在相关性。作者采用吲哚菁绿色（ICG）血管造影检查高度近视眼，并探讨其后路的患病率及其临床意义。所有患者的屈光不正均大于-8.25屈光度（D）。他们还检查了由42只眼睛（26例患者）组成的对照组，这些眼睛的屈光不正在+/-3 D范围内。结果：在255只高度近视眼中，61只（23.9%）有脉络膜血液通过后部途径流出。这些途径根据其穿透部位按静脉类型分类。一个引流到视神经乳头的边缘，另一个穿透黄斑附近的巩膜。然而，对照组42只眼中只有1只（2.4%）显示脉络膜后向流出。高度近视眼的脉络膜后路血流量明显高于对照组（P < 0.05）。结论：高度近视眼脉络膜后路血流量约占25%。这些血管似乎是高度近视眼脉络膜后流出的主要途径之一。
Purpose: A few reports in the ophthalmic literature have described choroidal blood outflow through posterior routes. Most of the patients reported were highly myopic; therefore, a correlation between such posterior routes and high myopia has been suspected. The authors examined highly myopic eyes using indocyanine green (ICG) videoangiography and investigated the prevalence and clinical significance of posterior routes in them.Methods: The authors examined 255 highly myopic eyes (146 patients) using ICG videoangiography. All had refractive errors greater than -8.25 diopters (D). They also examined a control group consisting of 42 eyes (26 patients) that had refractive errors within +/-3 D.Results: Of 255 highly myopic eyes, 61 (23.9%) had choroidal blood outflow through posterior routes. These routes were classified by type of vein according to its penetration site. One drained into the margin of the optic nerve head, and the other penetrated the sclera near the macula. However, only 1 of the 42 eyes (2.4%) in the control group showed choroidal outflow by a posterior route. The prevalence of posterior routes was significantly higher in the highly myopic eyes than in the control group (P < 0.05).Conclusion: Posterior routes of choroidal blood outflow were observed in nearly 25% of highly myopic eyes. These vessels appear to be one of the major routes of posterior choroidal outflow in highly myopic eyes.