The project started with a dream of Pedro Jaén R. in 1999, caused by his fear of going to the ophthalmologist the next day, and shortly thereafter he began to write it as a novel. In late 2006 he decided to recycle the material as a film script (at first he thought as a medium-length film, and finally a short film). Although he maintained the entire basis of argument, narrative and aesthetic of dream and novel, he made some necessary changes to the format: he eliminated the characters of Andrew's friends and their subplots, he subjectively focused in the drama of Andrés (who here becomes Alex), he changed the reason for the facts, and removed the gore.
The shooting took place mainly at the Ecoplar Aravaca residence, which several years before was an old, abandoned and eerie dormitory, where X-Y (2004) was shot. It was subsequently converted into a luxury nursing home.
The team delivered a false script to get the permissions of the location (nursing home), but once achieved, the team recorded the sex scene in the bed of an old man, while the team watched the door. Before shooting the sex scene, Pedro Jaén R. was afraid and stood talking to his assistant on a balcony in another area far from the set, but when they tried to leave, they saw that they had been locked up and had to call the team to rescue them.
The eye that Alex extracted from the jar was a real cow's eye, and half the team (all women) didn't want to be present while the scene was filmed.
In 2010 Pedro Jaén R. adapted all of the original literary material as feature-length screenplay titled "The House of the Corneas".