Here's when handgun iron sights can suck big time - personal vision handgun requirements.
As one advances in age, presbyopia becomes an issue for almost everyone sooner or later, and reading glasses or bifocals or progressives (trifocals) become the norm.
So here's wherein the problem lies - the distance from the dominant eye to the front sight of a handgun. It's longer than reading distance, and even if that eye-to-front-sight was shortened, bifocals or progressives with their diopter at the bottom of the lens requires tilting of the shooter's forehead up and back, which is a completely unnatural and incorrect shooting form.
One could acquire shooting glasses with top mounted diopters, or even glasses with both top and bottom diopters. These almost always work great at the range, but they are typically not practical as everyday use glasses for EDC CCW. A handgun mounted red dot, or laser, eliminates the eyeglass dilemma issues, and such a sighted handgun is always ready for action no matter what eye assistance the shooter is wearing.
To be clear, I'm not saying that an optic or a laser is better or worse than iron sights, it's just that for us older folks (you be judge of what "older" means) there are vision issues that creep up and demand addressing.
Heck, I always prefer iron sights and fortunately at my 74 year age I can still compete with a black powder .45-70 Sharps with a vernier rear and spirit globe front because my every day progressive lenses work fine at that bbl's 30" long sight radius. Dittos for my flintlock long rifle w/44" bbl and iron sights. Scope guns won't ever be an issue, thankfully.
But handguns, dang, that's where a short sight radius that's longer than the average reading distance really creates problems. Solved with a diopter or two fix at the range for plinking or matches, but that's not a practical solution for EDC CCW.
I'll be talking with my optometrist about the viability for a custom progressive lens set where the lens for my dominant right eye might allow for a top diopter ground into just that lens. I'd thought about an external diopter lens clip-on, but that wouldn't be prudent for EDC CCW where I wouldn't even carry with an external safety that requires flipping let alone have to think about having to flip down the dominant eye diopter lens when a second or two matters most for life and death.
So, here's my strong advice to all y'all young 'uns - don't get old and have to deal with presbyopia
Other than all of the above, how are you dealing with handguns and ophthalmic conditions such as presbyopia?