In fact, it took Mother Nature 540 million years of hard work to do this task, and much of that effort went into developing the visual processing apparatus of our brains, not the eyes themselves.

事实上，这样的成果， 是大自然花了五亿四千万年的光阴才得到的。这其中的努力，泰半是耗费在发展脑部的视觉处理这个区块，而不是眼睛的部分。