Changes

HoloLens requires neither cords nor phones. It features [[optical head-mounted display]] mounted on top of a plastic ring that wraps around your head. The plastic ring has a soft foam cushion on the inside. Like other HMDs, the weight of HoloLens is front loadedand feels a bit bulky. HoloLens can be used with most prescription glasses.

The transparent dual lenses displays are made of out 3 layers of glass (red, blue and green). A light engine is mounted above the lenses displays and projects light on the lenses. The tiny corrugated grooves in each layer of glass diffract these light particles, making them bounce around and helping to trick your eyes into perceiving virtual objects at virtual distances.