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视觉系统之前沿阵地,学名称视网膜,中医学叫神光;它位居眼球壁最内层又称眼底,是眼睛接受光线的屏幕,由感光细胞和传递信息细胞等神经组织构成。在整个屏幕的中央处有个特殊的城池,因为离体检验固定时呈现黄色,科学家为其命名为黄斑区。它的直径只有1～2个毫米,总面积比视乳头稍大。 从组织结构和生理功能上来看,黄斑部属于视网膜之特区,它的位置在眼球后极视网膜中央。视网膜的组织结构共分10层,而黄斑部最薄,黄斑中心凹部是视锥细胞的独家领地,驻扎7000多万视锥细
The forefront of the visual system position, science name retina, Chinese medicine called Shen Guang; it is located in the innermost layer of the eye wall, also known as the fundus, is the screen to accept light by the photoreceptor cells and transmission of information such as nerve cells. At the center of the screen there is a special city, because the in vitro test showed yellow when fixed, and scientists named it the macula. Its diameter is only 1 ~ 2 mm, the total area slightly larger than the optic nerve. From the organizational structure and physiological function point of view, the macular belongs to the special zone of the retina, its location in the posterior pole of the retina central. The retina’s tissue structure is divided into 10 layers, while the macular thinnest, macular central recess is the exclusive territory of the cones, more than 70 million cones