These Maison Martin Margiela glasses are purely decorative eyewear. The gold frames look just like a typical pair of functional glasses but they are meant to be a decorative accessory only, because they are completely lensless.
Margiela's removal of the function usually associated with glasses -- the improvement of vision -- makes this a fasionable piece of headwear. The unusual half-frame glasses are comparable to a watch without hands to tell time. Even though it is just decorative, this simple object makes for an unusual accent to add to an outfit.
The frames are quite costly and will set you back several hundred dollars, and although they will not help your vision any, these glasses will surely help others to see just how stylish you are.