Sight Is Not Vision
You have two eyes and a brain, and most people only ever train one of them. Sight is the picture. Vision is what you do with it. Sight is reading the letters off the chart in the doctor’s office — the E, the F, the P. Vision is knowing that the man in front of you is about to throw a left hook before the glove has moved an inch. They are not the same thing, and only one of them is a skill.
Here is what the research will tell you, and what any old trainer in any old gym will tell you for free: roughly eighty percent of what you take in during a fight comes through your eyes. But your eyes are not a camera. Only a patch of your vision smaller than your thumbnail held at arm’s length is actually sharp — about two degrees of visual angle. Everything else, the entire rest of the world, reaches you through the periphery. And in boxing, the punches come from the periphery. They come from the edges. They come out of the corner of the frame, from a man who has spent three rounds learning exactly where your eyes stop looking.
So when a fighter tells me he needs to get faster, I ask him what he is looking at. Nine times out of ten he does not know. He has never thought about it. He has been training his hands for years, and his eyes never once.

