Reaction Time
In sports, reaction is the initiation of a physical movement in response to some stimulus — swinging at a sinking curve ball, eluding a tackle and making a catch, letting a ball bounce ever so close to the outside of a line. In these examples, an athlete's ability to react can cost him, her, or the team a championship.
Many athletes assume that they have good vision, since they have 20/20 eyesight. But this does not necessarily correlate with the critical factor of sports vision.
_20/20 is a static measure of sight. Sports, on the other hand, are dynamic
in nature, and sports vision is the dynamic use of sight. Imagine a wide
receiver running out for a pattern. He needs to see the defensive player
look back, see the quarterback, and track the ball moving through the air towards
him all at the same time. Sports vision takes all this into account. Using
the previous example, it involves depth perception (the ability to see things
near and far accurately), convergence (the ability for the eyes to cross and
focus), divergence (the ability of the eye to uncross and focus), and saccadic
eye movement (the quick jumping of the eyes from one object to the next). This
is a very complex process that needs to work perfectly for a high level of sport
performance. Sadly, many athletes believe that you're either born
with it or you're not. The truth is that there are ways to exercise
sports vision in combination with physical training