glasses
You are CCing.
You get into a confrontation.
The first thing that happens is your glasses get knocked off.
Can't see a damn thing.
What do I do now?
What would you do in a rain storm of if they got fogged?
Pratice with out your seeing glasses!
Use shooting glasses and learn to "feel" your sight alignment.
This isn't NRA, bullseye shooting, is it now.
I had cataracts, and fired for my security "G" ticket, 5 years in a row, with a range gun, each time.
Mdl 10, S&W.
Never missed more than one in the 9 ring. (150 rounds fired each time)