Barton Perreira is an independent eyewear brand that takes time to invest in craftsmanship that produces nothing less than the finest eyewear in the world. These semi-frameless glasses are a design tour de force. Very lightweight, very luxurious. very understated. I think the design detail is most evident in the metalwork, very refined. Small frames, unisex.Mirror lenses which I purposely distorted in some photos. Adaptable titanium nosepieces. 20 46 146. An eyewear masterpiece. Pre-owned by handled gently and in very good condition.