^ As I've written elsewhere, my eyes are going, too.
Luckily for me, my rather severe nearsightedness has helped stave-off the worst of it....well, for the time being, at least.
I find that while I'm starting to peek over my glasses to load my microsurgery instruments, the front sight on my pistols (my EDC and HD pistols both carry .100-width front posts) are still reasonably crisp .
At some point, I think that switching to a modern "windows" setup (i.e. micro-RDS) will become a necessity - and I started training a new draw-stroke/presentation towards that as of a few years ago, but even so, I still wonder just how much that change may benefit me.
The problem for me is that I have significant astigmatism
as a result of my severe nearsightedness. Hence, even a true-holographic dot appears more like a comma/comet to me. While proper threat-focused technique has somewhat mitigated this concern (and luckily for me, the comma/comet typically has a consistent reference point, whereas I know that for other shooters with astigmatism, their unique presentation of the disease may cause them to inconsistently visualize even the same sight, from presentation-to-presentation), where it comes to the low-percentage shot, it does give me pause.
And that's where it gets me.....
In Pat McNamara's "Pistol Taps" DVD for Panteo Productions, he shoots a demo at 7 yards with an iron sighted Glock 17/19. He's literally drilling the same hole, clover-leafing, at this distance. He's placing the shots at about a 1-second cadence, and he's running through the entire mag, shot after shot after shot, live on-screen. He's doing this -he mentions as a complete side-note- with his 50-year-old (at that time) eyes which can no longer resolve the front sight post!
For the time being, I really do still very much like my Dawson's - I've really grown to love the speed of the narrow front post/wide rear notch of my setup, and the front fiber-optic really helps catch my eyes. Similar to @HayesGreener
, I also really like the Trijicon HD, in particular their XR variant.
I guess I'm just going to have to see what the coming years bring.