I've tried the flip focus type and didn't like the weight on my sunglasses. Then I tried the hat brim type and lost one set, another the hinge kept getting loose and had to keep tightening the screw or it wouldn't hold its position. For the last 5-6 years I've used an extra pair of reading glasses and hang them around my neck with a Croakie.
My regular reading glasses are 1.25. For fishing, I got a pair of 3 diopter glasses, all the better to see the hook eye and those tangles. The pair I ended up with are the half height type that sit down low on the nose, so I don't take off my sunglasses, just put the reading glasses over the sunglasses, then slide them off when I'm done. This works for me.