The book of John is a curated collection (events, interactions, and dialogue) written so that the you may believe that Jesus is the Son of God and that by believing you may have Life in His name. In John 9, the author is again curating the story so that we would more clearly see the person of Jesus. We see four refractions of Jesus as the Light of the World. Each of these refractions shed light on who Jesus is and who we are as well.
This program is already assigned to that list.