“keep your eye on the ball”不是指“眼睛要看球”，引申为全神贯注，集中注意力。

【例句】
I graduated in just three years because I was able to keep my eye on the ball and prioritize my studies above all else.
我仅用了三年的时间就毕业了，因为我能够完全集中注意力，把学习的位置放在高于一切事物上。

In this business if you want to be successful, you need to keep your eye on the ball.
如果你想在这份生意上成功，你需要集中注意力。