worn glasses since i was 7 (long sighted plus dodgy muscles behind my wandering left eye - hence me shooting right handed / eyed as an otherwise 'devout' left hander)
just over 2 years since my last test so about due for another one but my prescription never changes THAT much (getting very slowly worse) although increased PC use has accelerated change slightly in recent years
havent tried shooting without my glasses but i might just for shits and giggles since it couldnt make things much worse !
slainte
rob