The Sightmaster Corporation has taken advantage of the "one-way" mirror to present a viewing screen that looks like a decorative mirror when the set is turned off. As the photograph shows, the receiver resembles a period furniture piece. When it is turned on, the cathode-ray tube transmits the image through the mirror. Since the mirror is not quite completely transparent, it is said to act as a filter, reducing glare. The manufacturer is offering custom installations with the Sightmirror as well as the standard receiver.