In the center, your fovea clearly identifies 3 to 4 letters around where your eyes stop.

在中，你的中清楚地识别出你眼睛停下来的地方周围的 3 到 4 个字母。

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

由于中窝很小，你的眼睛过快速跳动的动作来阅读文本，这个动作被为扫。

Cones tend to be concentrated in the fovea.

锥细胞往往集中在中。

Raptors have an especially deep fovea— a depression in the back of their eye that fits more photoreceptors.

猛禽有一个特别深的中— —它们眼睛后部的陷处适合更多的光感受器。

It's approximately 5 millimeters in diameter and houses another even more specialized region known as the fovea.

它的直径大约为 5 毫米，并包含另一个更特殊的区域，为中。

And the fovea is the very center of the retina, about a quarter of a millimeter wide.

中是网膜的中心， 大约四分之一毫米宽。

The fovea is the area in the center of your vision where the photoreceptors are most densely packed, and where your vision is the sharpest.

中是你觉中心的区域，那里的光感受器密度最高，你的觉最清晰。

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，只有中窝的锥细胞密度足够高，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的文字。