I don't. I just upgrade my prescription as my eyes worsen. You're supposed to take eyesight breaks to rest and refocus your eyes. You're also supposed to sleep 8 hours a day, eat three balanced meals, and pee standing up. I don't give a shit what the man says. I make my own rules.
I'm pretty sure peeing standing up isn't one of those things you are supposed to do. In fact, I'm happy about it since I am pretty sure I'd simply have pee down my leg. (I'm female). And I*m not sure who cares if a penis-having human stands or sits so long as they aren't peeing on my leg.
I am your servant and knight forever should you ever have need of me.