Seeing "20/20" isn't the only measure of good vision. Visual acuity (20/20, etc.) is certainly important. But good vision involves a set of several skills, including depth perception, peripheral visual field awareness, eye-hand coordination and more.
All these vision skills are extremely important in sports, whether you play golf, soccer, baseball, basketball or racquet sports.
If you want to perform your best in sports, you may benefit from seeing an eyecare practitioner who has experience in sports vision – even if you already have 20/20 vision. This is because a typical eye exam usually doesn't include tests of visual skills important to sports performance.