XP

Just like how we how might have a hand that prefer to use for certain tasks, we also have something known as a dominant eye. When it comes to tasks such as shooting or tennis your dominant eye has a huge impact.

One way test what your dominant eye is for regular activities would be by stretching your arm and then covering a decently far away object with your thumb. If you close your right eye and your thumb is all of a sudden next to the object, you're right eye dominant. If the object is still covered, you're left eye dominant.

In some cases you might not have a dominant eye, basically being ambidextrous but for eyes.

Eye dominance is linked to tasks just as how hand dominance is also linked to tasks.