Eyedrops Episode 0
Japanese title: アイドロップス Episode 0
Alternative titles: Eye Drops Episode 0
Type: CM
Source: Original
Episodes: 1
Status: Finished Airing
Aired: Sep 5, 2016
Duration: 2 min
Rating: G - All Ages
Genres: Sci-Fi
Themes: Space

Episode 0 explains the setting: the planet EYE, light-years from Earth. The planet has the ability "to see things," but is commonly assailed by enemies. Protecting the planet from these enemies is the group of girls known as "Eyedrops." The video also explains how the human eye works. 

(Source: ANN)