SenseAGE Anti-Blue Light Privacy Screen Protectors Filter for Apple MacBook Pro 13.3" with Retina Display (Version of 2012-2015) [PRIVACY SHIELD] User sees the information on the display clearly but people on either side see a darkened screen. [ANTI-GLARE] Anti-reflective surface for enhanced viewing comfort and EYE PROTECTION. [IMAGE CLARITY] Designed for optical clarity when viewing from the front. Protects display from dirt, debris and scratches. [REUSABLE ADHESIVE STRIPS] Easy to put on and take off as needed. [BLUE LIGHT CUT] Blue light reduction.?P.s:before you purchase,please confirm the size.?