I own two pairs of bifocals (one spare), one pair of bifocal sunglasses, one pair of computer glasses without the bifocal reading part, one pair of glasses for the piano and one pair for watching TV in bed semi-lying down. I have reused old frames for the ancillary ones, including frames belonging to my mother, but seeing well is an expensive hobby. Myopia and astigmatism and different scripts needed for each eye complicates things; I am often stunned that I can see all the things I do.
At the library, I cannot read the titles on the lowest shelves unless I lie on the floor on my side, but then because of my total knee replacement, I cannot stand up without a derrick.