United States Eyewear Market Segmented By Product Type (Sunglasses, Spectacles, Contact Lenses, Sports Eyewear, Others (Safety & Protection Eyewear, Transparent Eyeglasses)), By End User (Women, Men and Unisex), By Sales Channel (Supermarkets/Hypermarkets, Specialty Stores, Online, and Others (Hospitals, Clinics, Make Up & Beauty Stores, etc.)), By Region, Competition, Forecast and Opportunities 2