the fastening-clip on the hinge had not yet been developed, and the lenses were popped into the frame “with feeling”. at the trade-fair “euroblech” in hanover, we discovered a laser-sheet-metal-cutter, which provided us with the first cutouts from stainless steal – the basis for our first attempts at remodeling. the material held out, and the hinge sprang to action with a never before seen liveliness. the frames were still without a fastening-clip. the objections which came from opticians, such as, “you have to be able to open up the frame, if that is supposed to be a serious pair of glasses,” were taken seriously by us, and we tried to find solutions. seek, and you will find: a slit right through the side of the hinge, and a clasp to fit around it, which held both sides together. the frames were now able to be taken apart and put safely back together. the “optician-proof” ic! berlin glasses were born.
 
another important development was the s-curve. while the hinge was separated by a straight cut, the s-curve created protection against twisting or misalignment of the two halves of the joint. this s-curve was later developed into the ic! berlin logo.
 
the so-called prescription glasses collection has existed since january of 2000. these frames have a modest 6mm wide temple – the hinge also underwent significant modification under the resizing process. a more complex clasp was developed to hold the side pieces together. from a design point of view, these glasses are a bit more modest. one might describe them as being conservative and chic.