When my vision went to crap with the added bonus of an astigmatism, (yes, I'm "slightly older" now) I switched to low power prism optics for short range work. I personally like what Primary Arms offers; reasonably prices, decent features and very workable.
I use a 1x Cyclops on my rimfire steel challenge rifle and a 3x Prism on my AR. I just added a PA 1-6x with a 22lr specific reticle on my Tippmann M4-22 Elite and have been very happy with all of them so far.
So long story short, due to my degraded vision I ditched the irons and replaced them with optics.