Who Needs Eyes When You Have Sapphire Crystal Lenses? is a collection of images from surveillance cameras and saved from the continuous stream that deletes them every 24 hours. The book presents a disturbing and dystopian imaginary of a world apparently without human beings, focused on the development of technology in relation to the growth of its potentiality through the web. One of the main problems of the so-called Internet of Things is the always reversible relationship between who observes and who is observed, because the devices we believe to use are actually able to use us and our data, making us all involved, in a certain sense, in surveillance.