The 57-year-old French luxury eyewear brand Vuarnet relaunched in the United States in September, bringing its iconic all-weather sunglasses back into the limelight. The brand first achieved fame over five decades ago with its namesake, the 1960 downhill-skiing Olympic gold medalist Jean Vuarnet. Years later, the company reached the peak of its popularity, greeting the 1984 summer Olympics as an official sponsor. Now, after having fallen from the radar for more than a decade, Vuarnet is back and as committed t…