kskarma Loc: Topeka, KS

While I am naturally "right-eyed", I DO use my right eye at the viewfinder and for a very good reason. I started with photography many, many, don't ask, years ago with a rangefinder Nikon SP. As many of us know, the early cameras had a 'rapid-advance' lever on the upper right corner of the camera...and by using my right eye, it allowed me to advance the film without moving my eye from the viewfinder....or...poking myself in the eye with my finger/thumb...!

Of course, nowadays with all of this 'new-fangled' motor drive action..(there is still film in the camera, right?..or have I missed something?)...it really should not make any difference, but old habits die hard....and I "see" no reason to change..!

AndyH Loc: Massachusetts and New Hampshire

I did the "thumb test" this afternoon. Thumb moved with both eyes. But I am totally right eye dominate, at least according to fifty plus years of astronomy and photography. Is it possible to be "ambivisual"?

Andy

LWW Loc: Banana Republic of America

Whether shooting pool, firearms or photography always rely on your dominant eye.

How to determine your dominant eye:

https://www.allaboutvision.com/resources/dominant-eye-test.htm

I hope this helps.

Shutterbug57

Right eye because that is how an instamatic worked best.

AndyH Loc: Massachusetts and New Hampshire

Just did it again per above link. Moved with both eyes. But more when I close the left one.

Andy

David Taylor

toxdoc42

You may have mild amblyopia. I was a pediatrician and saw many children who had esophoria, a condition in which there was a slight degree of amblyopia, we did what was called the alternate cover test. When the eyes both moved, I would refer to an ophthalmologist, often it simply meant that the child needed corrective lenses. You might check out your eyes with your glasses on, if you have corrective lenses. I find the little dial correction on the viewfinder on my D3400 very helpful, but I do use my dominant eye to shoot, even with that correction.