Start with the fully extended unfolded glasses

Before folding, gently retract the temple pieces until completely collapsed.

Then fold the glasses at the nosebridge hinges so that the right temple goes over the left temple. The right temple must go over the left so that the glasses fold properly and fit into the case.

Fold the nose piece hinge completely, sliding the earpieces over each other. The right earpiece hinge will rest over the left earpiece hinge.

Now fold the earpieces down, flush with the glasses.

Gently slide the glasses into the case, nose pieces out. Correctly folded glasses should slip in easily. If they don't go in easily, make sure the glasses were properly folded... And with a click, the snap top case closes neatly. If it doesn't, make sure the nose pads face away from the lid before closing.