I started wearing glasses just before I turned 40. Like Murray said "My arms weren't long enough" lol I went from wearing none to bifocals. The first day was a riot kinds sorta. I know where invisibles. According to my Optomogist there is over 1500 different changes from the top to the bottom. I know I love them but have to learn how to use them. I love that fact that they darken down outside so no need for sunglasses.
Sunglasses are a thing that I never could wear, never tried a prescription pair but All the ones off the shelf gave me a blinding headache. Had to get ground safety glasses the run off the mill ones would do the same