In the world of “White Christmas”, everyone has a networked brain implant called Zed-Eyes that enables heads-up overlays onto vision, personalized audio, and modifications to environmental sounds. The control hardware is a thin metal circle around a metal click button, separated by a black rubber ring. People can buy the device with different color rings, as we see alternately see metal, blue, and black versions across the episode.

To control the implant, a person slides a finger (thumb is easiest) around the rim of a tiny touch device. Because it responds to sliding across its surface, let’s say the device must use a sensor similar to the one used in The Entire History of You (2011) or the IBM Trackpoint,

A thumb slide cycles through a carousel menu. Sliding can happen both clockwise and counterclockwise. It even works through gloves.


The button selects or executes the selected action. The complete list of carousel menu options we see in the episode are: SearchCameraMusicMailCallMagnifyBlockMapThe particular options change across scenes, so it is context-aware or customizable. We will look at some of the particular functions in later posts. For now, let’s discuss the “platform” that is Zed-eyes. Continue reading