I don't follow too many sports, although I do like them, I've just never had much luck with objects moving through air in any kind of proximity to my face. (fashioninflight.com)
As objects move on the screen, they leave behind a bit of the image of their last position like a shadow. (digitaltrends.com)
As progress, he / she can now visually track a moving object moving from the other side to the opposite side and another movement such as up and down. (babyishcare.com)