When we encounter a face, we view it as a whole, by a process of integration of the parts, which takes place, as some scientists and physicians understand it, in the optic nerves long before any transmission reaches the brain. The otherwise dizzying abundance of information that hits the retina is distilled in this tract of fibers behind the eye into a sign that our intelligence can absorb. When we see a strip of letters, a billboard slogan, for example, we cannot help but read the word; we do not see each letter separately, but rather, instantly, we grasp the whole word and, moreover, its meaning.
In The Light of what We Know (2014)