It turns out that not all eyes were born equal, and that most of us have one dominant eye. The dominant eye, is the one your brain prefers when it comes to processing visual input, and you should probably use that eye when looking through the viewfinder.
Here is a neat trick you can preform to discover which of your eyes is the dominant one. Courtesy of reddit user ElementK.
- Extend both hands forward of your body and place the hands together making a small triangle (approximately 1/2 to 3/4 inch per side) between your thumbs and the first knuckle like this.
- With both eyes open, look through the triangle and center something such as a doorknob in the triangle.
- 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.
What are you? A lefty or a righty?