Duh. Your eyes have to see something before your brain processes it and then it takes time for your muscles to move away from danger. More wasted $$$$.
Your eyes don’t “see” anything until the image is recognized and processed. As it turns out, scientists are discovering that that this capablity exists both in the brain, and for quicker response times, in the eye itself. I would imagine this discovery has profound implications with respect to ophthalmology, etc.
As bgill points out, "Your eyes have to see something before your brain processes it and then it takes time for your muscles to move away from danger." The just-so story fails to consider the possibility that the linkage from "eye" to "muscle" predates the brain.