Red dots are definitely the game changer for those of us with 'old eyes.' Easier to use than irons, faster and more accurate. Granted, there is a learning curve but not much of one, if you make any effort at all.
I don't consider myself to be old, although I have reached that age where my close up vision is gone when wearing my glasses.
The game changer for me was to switch to a monovision prescription. My non dominant eye is corrected for distance, my dominant eye has a weak prescription that allows for reading up close.
I can now focus on the front sight without any trouble. I also vastly prefer shooting outside where the light is much better.