A dive mask having a configuration of reverse Galilean telescopes. The present invention also includes a protocol for master and slave devices to communicate on the bus and for registers in each device to differentiate each device and allow bus requests to be directed to a single or to all devices. The intermediate camera together with the hydraulic tube and the manual syringe form a hydraulic press system that allows to increase in a potential way the pressure exerted in the first syringe and to make the injection of polymethylmethacrylate at an approximate distance of 1.