My vision started to go when I was only in 2nd grade. Wore glasses for awhile, but then decided contacts were the way to go. Then started getting eye infections from overuse of contacts when in vet school (long hours!). So I went the LASIK route. It's been over 2.5 years since I got it done and it's been the best money I've ever spent. For all of you with such crappy vision that you have to squint right up in front of the alarm clock when you wake up..LASIK is amazing. It was a miracle for months, being able to wake up and see that alarm clock! If anyone has any LASIK questions I will be happy to answer them!
As for the arthritis, I can't speak for humans but I know dogs can get it early from genetics, too much weight, too much wear and tear, poor conformation, etc. First thing I always recommend to owners is glucosamine/chondroitin sulfate. Definitely the safest and very effective for most. Must take twice daily for at least 4-6 weeks to notice a difference, and must be taken longterm after that.