I really want a pair of
these safety glasses for the shop, but the least power the bifocal comes in is +1.5.
My store-bought reading glasses are +1.25, and they are too strong.
My optometrist said that +1.0 are sometimes available in the store.
I once had a pair of bifocal sunglasses made for me (I'm near-sighted, and only wear my glasses for driving/riding or watching TV) so that I might easier read a map in the top of my tank bag.
That didn't work out so well. They just sit in a case somewhere gathering dust.