Summary My step sister asked me if I could fix her glasses? Easier to print new ones! And actually, I needed a challenging desing project, and this was a good one. But the interest of this thing is not the thing itself, it's more the way I've done it: I took some pictures of the lenses, then imported them to sketchup. I used the 3 points arc to draw a polygon that has the exact same shape and erased the picture. Then, I scalled the shape to fit the real size of the lenses. I only had to spent lot of time drawing the glasses around it! I used a welding iron to glue the sides. Printed with ninjaflex, it makes unbreakable glasses!