How about this uber-cool design by METRONOME-Eyewear? This design by Japanese artist Bisei Iwamoto was initially intended to have round rims within round rims, placing the crescent-shaped lenses on the sides, but Bisei realized that it was impossible. Being a true designer, he naturally didn’ t gave up that easy, and decided to put two different round lenses together, like a pair of double lens flip-ups. Using lenses with gradient colors for both the outside and the insides give the frame a very strong impression, toned down by its simple metal temples. Pretty unique stuff, as we are used to from Bisei!