My right eye is -2.5 with an IOL, and my left eye is about -4 with a cataract. When I test for dominance without glasses by focusing on a distant object, my right eye is dominant. If I wear my glasses, which correct my distance vision in both eyes, and do the same test, my left eye is dominant. I think my left eye is my sighting eye.
I would like to know which eye is dominant because I will be getting cataract surgery in my left eye, and I am considering getting monovision by having it corrected for full distance vision.