The privacy filter for think pad yoga 14 utilizes the patented 3m microlouver privacy technology to prevent onlookers from viewing confidential information on your screen visual privacy is a key concern in todays high technological environment and our privacy filters are designed to block the vision of wandering eyes providing a full 120 degree security it also act as a screen protector and guards your screen from scratches and smears unlike other generic filters in the market place the len