Just read a thread that mentioned the dominant eye. Here's an easy way to find your dominant eye if your courrious and if you think it might help. Look at an object at least 20 ft away. With your hand stretched out in front of you, make a circle with your thumb and forefinger and sight your object through the circle with both eyes open. Now close your eyes one at a time. Your dominant eye will be the one that does not shift the image out of the circle.