How to check if you are left or right eye dominant:
1. Extend both hands forward of your body and place the hands together making a small triangle (approximately 2cm per side) between your thumbs and the first knuckle like this.
2. With both eyes open, look through the triangle and center something such as a doorknob in the triangle.
3. Close your left eye. If the object remains in view, you are right eye dominant. If closing your right eye keeps the object in view, you are left eye dominant.