ChromaDepth images can be viewed comfortably and legibly without glasses, even though the 3D effect will not be perceivable without them. History ChromaDepth 3-D was invented by US researcher Richard Steenblik after he noticed that the bright colors on the screen of a TEMPEST video game seemed to lie in different depth planes. In the course of eight years of after-hours experimentation, Steenblik created plastic prisms, glass double prisms, Fresnel prisms, and liquid optics using glycerin and Chinese cinnamon oil held in wedge-shaped glass cells. These liquid glasses worked, but were not suited for mass production. Steenblik and his business partner, Dr. Frederick Lauter, were about to give up when a new optical development came to their attention. Researchers at the Massachusetts Institute of Technology (MIT) had developed binary optics; a way of making very thin diffractive optics with the efficiency of refractive optics. Optical devices use reflection, refraction, or diffraction to move light around. Optics which use refraction, such as lenses, are usually designed to reduce refraction. The binary optics found in ChromaDepth 3-D glasses, combine refraction and diffraction to make thin optics that act like thick glass prisms. After two years of development work with MIT, the ChromaDepth 3-D production solution was found. ChromaDepth lenses were first used commercially in June 1992. Usage in popular media In 1997, American cable TV network Nickelodeon distributed Chromadepth glasses at Blockbuster Video and through some Kraft products, which could be used for special 3D segments on new programming that September, terming the glasses "Nogglegoggles" and the 3D format "Nogglevision". The Rock band KISS utilized the Chromadepth process for an alternate version of the music video for their 1998 single Psycho Circus, releasing it on VHS at that time with a free pair of glasses for viewing. Chromadepth glasses were also utilized for the VH1 series I Love the '80s 3-D, with free pairs of glasses available at Best Buy locations. The 1996 computer game Stay Tooned! featured three mini-games designed for Chromadepth (named "Toonvision" in the program & manual), with new copies of the game coming with a pair of Chromadepth glasses. Chromadepth glasses have been used and distributed for some haunted house and Halloween attractions for added visual appeal, often featuring custom glasses for patrons. Numerous books, special publications, promotional giveaways, and children's toys have been released with or intended for use with Chromadepth glasses as well, notably including Crayola