Several types of visual prosthesis are in development or trials in humans, and one device has been approved for sale in the European market. , 16 blind people worldwide have had sight partially restored in a procedure where electrodes implanted in their brains take impulses from a camera to allow patients to see lights and outlines of objects. There is a device developed by NASA called a Joint Optical Reflective Display, or JORDY, that is presumably named for Geordi La Forge.