translation.en: Indeed, there are over 12,000 neuroscientists who work on the visual system, from the retina to the visual cortex, in an attempt to understand not just the visual system but to also understand how general principles of how the brain might work.
translation.zh: 事实上，超过 一万两千位神经科学家 是研究视觉系统的。 从视网膜到视觉皮层的 这些科研不仅仅是局限在视觉系统， 还包括如何通过视觉系统研究去了解 大脑是如何运作的普遍原理。