Help protect the sensitive information on your laptop and reduce the chances of wandering eyes viewing confidential data on your screen. Limit the field of vision to +/- 30° so a person off to the side only sees a dark screen. They are easy to install, either with included frameless tab holders or double-sided tape. The reversible privacy screens also use an anti-reflective coating to reduce glare, and they filter out harmful blue light by up to 30 percent.