Why and when did kenneth j dunkley inveted the 3d glasses?

Kenneth J. Dunkley invented 3D glasses in 1986 to enhance the viewing experience of 3D images and films. His design utilized a unique anaglyphic method, which involved using colored lenses to filter different images for each eye, creating the illusion of depth. Dunkley's invention aimed to make 3D technology more accessible and enjoyable for consumers, ultimately contributing to the popularization of 3D media in entertainment.