This is an Inside Science story. Predictive eye movement research shows that the brains of hockey fans may share a similarity with retired star Wayne Gretzky's.... But our fovea--the small area at the center of our retinas with tightly packed photoreceptors--allows us to see things in the center of our vision with high resolution.... Humans typically move this fovea, the focus of our vision, two or three times a second while tracking something of interest....