Ruskell G
Department of Optometry and Visual Science, City University, London.
Br J Ophthalmol. 1998 May;82(5):495-7. doi: 10.1136/bjo.82.5.495.
BACKGROUND/AIMS: All blood drainage from the retina is thought to occur through the central retinal vein with rare, if any, exceptions. A chance observation of a specimen in which this pattern did not apply suggested that the subject required review.
An optic nerve head, identified from an earlier study as possessing an unconventional venous drainage arrangement, was examined histologically using interrupted serial resin sections. 200 fundus photographs were examined to compare with the results from the sectioned optic nerve head.
A retinopial vein passing from the temporal retina and entering the pia mater without first joining the central retinal vein was observed. Two of the fundus photographs and possibly four others displayed a venous pattern consistent with this arrangement.
The retinopial vein complements the central retinal vein in blood drainage from the retina. Uncertainty in identifying the vein ophthalmoscopically prevents a reliable estimate of its incidence but it appears to be uncommon. Retinal dysfunction may be limited in cases of central retinal vein occlusion in the presence of a retinopial vein.
背景/目的：人们认为视网膜的所有血液引流均通过视网膜中央静脉进行，即便有例外也极为罕见。一次偶然观察到的一个不符合这种模式的标本表明该问题需要重新审视。
对一个在早期研究中被确定具有非常规静脉引流排列的视神经乳头进行组织学检查，采用间断连续树脂切片。检查了200张眼底照片以与切片视神经乳头的结果进行比较。
观察到一条视网膜软膜静脉从颞侧视网膜穿出，未先汇入视网膜中央静脉便进入软膜。2张眼底照片以及可能还有另外4张显示出与这种排列一致的静脉模式。
视网膜软膜静脉在视网膜血液引流中对视网膜中央静脉起到补充作用。在检眼镜检查中识别该静脉存在不确定性，这使得难以可靠估计其发生率，但它似乎并不常见。在存在视网膜软膜静脉的情况下，视网膜中央静脉阻塞病例中的视网膜功能障碍可能会受到限制。
