Varifocals
I tried these (only need glasses for reading), and could not get on with them at all. Looking from left to right made the whole image distort - made me feel disoriented.
I have a half size pair that I sit on the end of my nose, so I can easily see over them - they have very thin "legs" that fit under the headset without allowing noise ingression, and a neck strap so that they will not get lost if removed.
I guess all glasses are a pain, but you do get used to them.