Laptop Privacy Filter.

This type of screen protector is designed to keep the information on a computer screen private from people viewing it from an angle. A privacy filter works by using a technology called micro-louvers, which restrict the viewing angle to directly in front of the screen. The filters also often have an anti-glare coating to reduce reflections and eye strain. In addition to privacy, these filters can protect the screen from scratches and reduce blue light exposure. The packages in the image specify that the filters are for 14-inch screens, with dimensions of 310mm x 174mm.