Privacy Filter For Widescreen Monitor For 23.8" Flat Panel Monitor, 16:9 Aspect RatioHelp protect the sensitive information on a monitor and reduce the chances of wandering eyes viewing confidential data. Limit the field of vision to + 30 so a person off to the side only sees a dark screen. They are easy to install with either the 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.