One Way Vision Signs from BannerBuzz One Way Vision signs, also known as perforated window signs or one way window signs, are almost the same as having tinted windows. As the name suggests, they allow one-way vision ideally from inside to the outer views. While these seem like, people on one side of the window have a view through the sign while people who are on the other side do not. Easy and Quick Application of One Way Window Screens and Signs Our one way window screens come with a pre-glued backing. Free Download Discover Your Destiny here.  The pre-glued back helps you to have a hassle-free application on glass surfaces; there is no need to deal with a time-consuming, messy time trying to apply adhesive yourself.