Here is a simple way to find your dominant eye:
1. Extend your arms out in front of you.
2. Create a triangular opening between your thumbs and forefingers by placing your hands together at a 90-degree angle.
3. With both eyes open, center this triangular opening on a distant object — such as a wall clock or door knob.
4. Close your left eye.
5. If the object stays centered, your right eye (the one that’s open) is your dominant eye. If the object moves out of the triangle, then your left eye is your dominant eye .
Another way to find your dominant eye is to keep both eyes open and focused on a distant object, then extend your arm out and point with your index finger or thumb at the object. Alternately close one eye at a time The eye that keeps your finger directly in front of the object while the other eye is closed is your dominant eye.
I hope this helps!