So when we're young and fit our brain focusses on moving objects, not on the background. As we age we take more notice of the background, because the young and fit are dealing with threats or lunch, we are the wise mentors gathering other information. All fits perfectly until we are driving in today's traffic, and just didn't notice that cyclist we ran over."The amount of visual information around us is huge, and we don't have the brain power to process it all," Tadin said. "Evolutionarily speaking, moving objects are the most important visual features to detect quickly, because they could be your lunch or they could want to eat you for lunch. It just makes sense that our vision prioritizes processing them."
http://www.sciencedaily.com/releases/20 ... 172315.htm