Patented 3m micro louvre technology makes on screen data visible only when directly in front of screen feel secure knowing that your valuable data is not being overlooked improves contrast and privacy without blurring or distorting images on the screen guards against scratches and damage to the screen reduces glare to help prevent eyestrain and headaches related to monitor use easy to remove though can be left in place while laptop is closed ever felt like someone was looking at your scre