Lens
Lenses are used to focus dispersed light, used in machines with prisms as logic elements, akin to electric current.
Crafting
Lenses are formed by pummeling Chromatic Glass with a lode hatchet.
Usage
When a light source is placed near the input (concave) side of a lense, the lens will become active, and output focused light from the output (convex) side of a lens. When focused light is directed into the input side of a lens, it will turn into a glowing lens, producing regular, scattered light.