Bifocal sunglasses from Klammeraffe

Here you can see the so-called bifocal reading glasses with a small reading part at the bottom of the lens.  Of course, all glasses here have full UV400 protection.

If you are looking for sunglasses with continuous strength throughout the lens, you can find them here (and also sunglasses without strength):
Sunglasses with strength throughout the lens

Bifocal sunglasses with 
Small reading part in a glass