Osa is a small, sunglasses boutique in Fashion Island, located in that stretch of shops between Macy’s and the new Nordstrom. They have gorgeous designer shades and excellent customer service! I picked out my RayBan’s here. The salespeople were friendly, and knew a lot about the differences in lens(polarized vs. non-polarized). I went in looking to replace lost Wayfarers, but the girl there showed me the New Wayfarers and some Tom Ford shades that I liked even more. It’s a small enough shop that you’re able to get tons of one-on-one help. They polished my shades before the sale was finalized, and the guy who was working there gave me a mini bottle of Osa water while I was shopping. Overall a great sunglasses buying experience!