how many different kinds of bifocal eyeglasses do you have?

[mens glasses]

Do you know how many different kinds of bifocal eyeglasses do there have? If not, this tips may help you for your first shopping for bifocal glasses, there are three kinds: vaulted bifocal eyeglasses, Flat-topped bifocal eyeglasses, and one line bifocal eyeglasses.

[glasses lens]

i want to know which one is the best for me, this is my first time to choose bifocal eyeglasses, I am 48, is it available with contact bifocal eyeglasses the same as progressive eyeglasses? Thanks.