Susan Weinschenk said:People are great at recognizing patterns – Recognizing patterns helps you make quick sense of all the sensory input that comes to you every second. Your eyes and your brain will want to create patterns, even if there are no real patterns there. Your brain wants to see patterns.
Individual cells respond to certain shapes – In 1959, two researchers, Hubel and Wiesel showed that there are individual cells in the visual cortex of your brain that respond only to horizontal lines, other cells that respond only to vertical lines, other cells that respond to edges, and cells that respond only to certain angles. (In 1981 Hubel and Wiesel won a Nobel price for their work on vision).
Food for thought; maybe there is a physical difference in the eyes themselves that allows some to "see" angles, edges, and lines better than others. Discounting natural ability, and motor control skills which can be learned or corrected. Perhaps this is also why some aiming systems work for Billy, Bob, and Ray, but not Andy, Mike, or James.