Lenovo privacy filters utilize privacy technology to darken the screen at specific angles so as to block the vision of wandering eyes from viewing your screen while you work. Privacy filters' key benefit for companies that work with client data and information is that they provide the first line of defense against visual hacking protecting private information from being hacked by on lookers. The privacy filters also reduce glare from bright backlight panels and overhead lights though that's not its primary function. Another function is that privacy filters guard your screen from scratches and smears, keeping your monitor screens safe from unwanted destruction.