CITY EYE is the world's first power-generating cascading-type glass solar brick. It’s using a glass micro-structure light-guiding system and absorbing sunlight through strips of silicon solar cells on the side of glass brick. After solar energy is converted to electricity, it generates light through a transparent LED light-transmitting glass plate. Its light absorption efficiency reaches 72%, and its luminosity efficiency 80%. It will draw the most media attention of eco building materials. It provides not only brightness at night but, in combination with existing glass bricks and selection of various modules, also an enriched variety to walls.