I am left-eye dominant and wear eyeglasses, and up to recently I have always photographed using my left eye to view the image. This applied to rangefinders and D/SLRs. I always felt that my right eye was never that well corrected. Pushing the camera against the glasses to view with my left eye did tend to push the frames out of kilter.
One exception: In the late early 60's I owned a Nikon SP rangefinder which had a 1:1 viewfinder. This allowed you to keep both eyes open and see the area surrounding what the camera saw so that you could anticipate what would happen next. A great feature, but only if you held the camera to your right eye and kept the left eye open as well. I actually tried using contact lenses to enable me to view with my right eye when using the SP. It was great except that I could not adapt to the contact lenses and had to give them up; they were the hard kind. As an aside, I never understood why Leica didn't do the same 1:1 viewfinder thing.
My glasses until recently were always hardened glass, so pushing the camera against them was not an issue. Two things happened. Hardened glass lenses were getting harder to get. Plastic lenses had a much greater risk of being scratched, but I had to purchase plastic ones for my most recent pair. But I also had cataract surgery done on my right eye, making the right eye vision much better, even without glasses (since then the left eye has also been done). What I do now is wear a retainer cord on my glasses so that I can drop them when I go to take a photo using my right eye for viewing and focusing. The viewfinder adjustment on my various cameras is sufficient to correct my right eye viewing vision.
Last edited by cpk; 07-28-2019 at 02:51 PM.