NEW YORK—A reshaping of the U.S. optical industry continued among the industry's largest retail and ECP group players last year. The 2018 VM Top 50 U.S. Optical Retailer's Report exclusively assesses 2017 calendar year sales, revealing new positioning among the Top 10 players within 2018's Top 50 ranking. Editor’s Note: due to some adjustments in the number of store locations and sales revenues for certain companies for 2017, this story has been updated as of May 15.