I've got a very different trippy and psychedelic animated short film called "Myosis." It's beautifully made, and this is the explanation that came along with it that inspired the short.
Myosis is the constriction of the iris which decreases the diameter of the pupil. It is an unconscious phenomenon which can be triggered by an intense light, fear, or the effect of epiphany.
The film was created by Emmanuel Asquier-Brassart, Ricky Cometa, Guillaume Dousse, Adrien Gromelle, and Thibaud Petitpas at Gobelins school of arts. I hope you enjoy it!