I own a Shield 9mm with factory 3 dot sights and am 63years young. At about 40 my 20/20 turned into (first) reading glasses till now i'm sporting bi-focals. Over the years I have been thru training courses from different sources and one thing that's been consistent is look at the front sight, front sight, front sight am a believer in that. So I'm thinking I might be better off with a plain(no dots) rear and a dot front sight, the goal being to draw my focus better to the front sight. And I'm wondering if any of you folks have gone this route and how it's worked out for you.