EYE21 is a device which represents the environment by a set of acoustic sounds. Its main operation is to detect all obstacles around the user, using stereovision.

Before using the device as a navigation tool, the user must be trained on EYE21 laboratories with some exercises, to feel the location of objects using acoustic sounds through a headset. At the same time, the user will learn to locate those sounds and interpret them, as if they were real obstacles, learning to avoid them and creating its own navigation map.

Once the object appears in front of the user, the system sends an acoustic sound to him with its position. An example could be an object in 2 meters distant and 15 grades to the left. In this case, the system will play an acoustic event in position 2 meters distant and 15 grades to the left. However, if there is nothing in his area, the device will remain in silence. With these data the user will have the following information: the road is free and there is no object around.

Eye21 has the first glasses to allow blind people to detect obstacles, recognize people, find objects and read texts. It can work in four different modes: navigation, social connection, reading and recognition.