Head-Mounted Display (HMD) is a display device that is worn on the head or worn with a helmet. They generally include one or two small display lenses and semi-transparent mirrors incorporated in the helmet. Though it is known for its usage in video games, it is not limited to only that. HMD’s are used for: human research, engineering and scientific visualization, and training and simulation to name a few.
Contact lens or bionic contact lens contains special elements such as LEDs and antennas for wireless communication. In the U.S Military, they have contact lens that are designed to function with augmented reality spectacles which allows soldiers to simultaneously focus on close-to-the-eye AR images and distant real world objects. This is without a doubt useful for soldiers who are on the