I keep all the glasses’ prescription files over the years. They’ve gotten a bit stronger over the years due to improvements in the technology.
The newest I have looks to be 2003 (there’s probably a newer one somewhere, but I’m not sure where it is at the moment) +16 in one eye and +15.75 in the other…. these suckers used to be really thick when I was younger, but smaller lenses and better technology’s made them thinner and lighter. I was basically in cokebottle lenses as a kid. :S