Optics and Design, or O&D, is a department inside of Lumon Industries located on the Severed floor.

People who work in O&D wear blue lab coats and green badges.

Until his retirement, Optics and Design was headed by Burt G.

At first, the sole function of O&D seemed to be the storage, maintenance, and rotation of the large number of paintings in the Lumon collection. It also appeared to be a very small department occupied by just two people - Burt G. and Felicia. The space occupied by them is dominated by cabinets and flat file drawers of artworks. Each has a work table where they examine and restore the paintings.

Later, it is revealed that O&D is a much larger department than had been let on. Because of this, its function is no longer so obvious. Behind a door located inside of O&D, there is a vast workspace with rows and rows of some type of machine. Almost every machine visible has a person standing and working at it, suggesting that dozens more people work in O&D. It is not clear what is happening in this area. Objects are seen being removed from the machines, such as hatchets or watering cans.

There is a long-standing but little understood enmity between O&D and Macrodata Refinement. According to Lumon mythos, one department attacked and slaughtered the other, but the identity of attacker and victim is unclear, assuming the incident occurred at all.