Not really. I have another red dot on a different pistol and it's usable. It has a 3 moa dot, but it looks more like a jagged - to me than a circle. I'm just concerned about the 507K because of the reticle choice. I don't know how bad the large circle will look, and if I turn that off I'm left with a 2 moa dot only, which will probably be fine but I'd prefer to see it with my own eyes before I buy and have the slide modified.Makes sense. I have vision correction as well. So your concern extends to ANY optic right?