The technological challenges are definitely hundreds, one and developing one user-friendly optical system to fix each vertigo brought on by convergence modification disputes additionally the poor quality for the visual normally on the agenda. Speed up their industrialization to micro-display technology, particularly silicon-based organic light-emitting diodes OLEDoS, micro-LEDs micro-LEDs and/or illuminated field displays, additionally advertise eye-close show high definition to low latency. Minimum energy consumption, wide viewing angle, variable depth concerning industry, slim to lighter, and so forth ... Provider.