The Triangle Test
Extend both arms forward.
Form a small triangle with your thumbs and index fingers.
Choose a distant object and center it inside the triangle.
Close one eye.
Then close the other eye.
The eye that keeps the object centered is your dominant eye.
The eye that causes the object to “jump” out of view is your non-dominant eye.
It’s quick—and surprisingly revealing.
Why Does Eye Dominance Matter?
For most everyday activities, it doesn’t make a huge difference. But in some tasks, it matters significantly.
1. Shooting Sports
In activities like archery or rifle shooting, eye dominance determines aiming alignment.
For example:
A right-handed person who is left-eye dominant may struggle initially with sight alignment.
This is common in competitive sports.
2. Photography
Photographers often prefer using their dominant eye when looking through a viewfinder.
