My foldable reading glasses went useless as the limiter tab on the hinge broke off. So I made an enforcement that fits the bars, and limits the angle so the reading glasses have a good fit again.

It may be neccesary to use a a 3.5 mm drill to remove any burrs inside the hole before mounting on the bars.

Note that the enforcements for left and right sides are different.

FreeCAD file is included.