Since the fovea is pretty small, your eyes read text by making quick jerky movements called saccades.

由于中央窝很小，你眼睛就会通过快速跳动动作来阅读文本，这个动作被称为。

The area surrounding the fovea, meanwhile, is best at picking up shadows and shadings of black and white.

同时，中央凹周围区域最适合画阴影和黑白阴影。

Leonardo discovered that the central area of the retina, known as the fovea, is best at picking up small details, like the edges of Mona Lisa's lips.

莱昂纳多发现，网膜中央区域，即众所周知中央凹，和蒙娜丽莎嘴唇边缘一样，最适合画小细节。

Of these, only the fovea has a high enough density of cones, the type of photoreceptor cell in your eye that can perceive small details, to make out text on a page.

其中，只有中央窝锥细胞密度足够高，锥细胞是一种觉感受器细胞，可以感知小细节，从而辨认出一页纸上文字。